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resources:eval:eval-ad7944_85_86edz [24 Apr 2012 12:43]
CatherineR c
resources:eval:eval-ad7944_85_86edz [26 Sep 2013 22:30] (current)
awalshe [Jumpers, Solder Pads and test points]
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 ======General Description====== ======General Description======
-The EVAL-AD79XXEDZ is an evaluation board for the 20-lead [[adi>​AD7944]] (14-bit), [[adi>​AD7985]] (16-bit), and [[adi>​AD7986]](18-bit) PulSAR® analog-to-digital converters (ADCs).  +The EVAL-AD79XXEDZ is an evaluation board for the 20-lead [[adi>​AD7944]] (14-bit), [[adi>​AD7985]] (16-bit), and [[adi>​AD7986]] (18-bit) PulSAR® analog-to-digital converters (ADCs).  
-On-board components include a high precision, buffered band gap 5.0 V reference ([[adi>​ADR435]]),​ reference buffers ([[adi>​AD8032]]),​ a signal conditioning circuit with two op-amps ([[adi>​AD8021]]),​ and an FPGA for deserializing the serial conversion results. ​+On-board components include a high precision, buffered band gap 5.0 V reference ([[adi>​ADR435]]),​ reference buffers ([[adi>​AD8032]]),​ a signal conditioning circuit with two op amps ([[adi>​AD8021]]),​ and an FPGA for deserializing the serial conversion results. ​
 The evaluation board interfaces to the CED capture board by using a 96-pin DIN connector. In addition, SMB connectors, J1 and J2, are provided for the low noise analog signal source. The evaluation board interfaces to the CED capture board by using a 96-pin DIN connector. In addition, SMB connectors, J1 and J2, are provided for the low noise analog signal source.
  
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   - Connect the EVAL-CED1Z board to the PC via the USB cable. ​   - Connect the EVAL-CED1Z board to the PC via the USB cable. ​
     - Choose to automatically search for the drivers for the [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] board if prompted by the operating system. ​     - Choose to automatically search for the drivers for the [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] board if prompted by the operating system. ​
-    - For Windows ​XP you may need to search for the [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] drivers. +    - For Windows® ​XPyou may need to search for the [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] drivers. 
-  - Launch the EVAL-AD7944/​AD7985/​AD7986EDZ software from the Analog Devices subfolder in the Programs menu. +  - Launch the EVAL-AD7944/​AD7985/​AD7986EDZ software from the **Analog Devices** subfolder in the **Programs** menu. 
-  - Select the appropriate device from the drop down menu [[adi>​AD7944]],​ [[adi>​AD7985]],​ or [[adi>​AD7986]]. ​+  - Select the appropriate device from the drop-down menu [[adi>​AD7944]],​ [[adi>​AD7985]],​ or [[adi>​AD7986]]. ​
   - Apply a signal source to the AIN+/AIN− SMB inputs on the evaluation board. ​   - Apply a signal source to the AIN+/AIN− SMB inputs on the evaluation board. ​
   - Configure the signal source for the appropriate signal applied to the input of the device. ​   - Configure the signal source for the appropriate signal applied to the input of the device. ​
-  - Capture data by initiating a single capture (F3) or a continuous capture (F4).+  - Capture data by initiating a single capture ​**(F3)** or a continuous capture ​**(F4)**.
   - See details on configuring the software in the Running the ADC Analysis Software section.   - See details on configuring the software in the Running the ADC Analysis Software section.
 Note that the measurements made by Analog Devices use the Audio Precision SYS-2522. Note that the measurements made by Analog Devices use the Audio Precision SYS-2522.
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 ====== Evaluation Board Hardware ====== ====== Evaluation Board Hardware ======
  
-The low power, [[adi>​AD7944]]/​[[adi>​AD7985]]/​[[adi>​AD7986]] ADCs offer very high performance of up to 2.0 MSPS ([[adi>​AD7986]]) and 2.5 MSPS ([[adi>​AD7944]]and [[adi>​AD7985]]) throughput rates using a flexible parallel interface on the 96-pin interface to the [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] board.  +The low power, [[adi>​AD7944]]/​[[adi>​AD7985]]/​[[adi>​AD7986]] ADCs offer very high performance of up to 2.0 MSPS ([[adi>​AD7986]]) and 2.5 MSPS ([[adi>​AD7944]] and [[adi>​AD7985]]) throughput rates using a flexible parallel interface on the 96-pin interface to the [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] board.\\  
-The evaluation board is designed to demonstrate the performance of the ADC and to provide an easy-to-understand interface for a variety of system applications.  + 
-The evaluation board is ideal for use with the Analog Devices Converter and Evaluation Development EVAL-CED1Z (CED). The design offers the flexibility of applying external control signals and is capable of generating conversion results on parallel 16-bit wide buffered outputs.  +The evaluation board is designed to demonstrate the performance of the ADC and to provide an easy-to-understand interface for a variety of system applications. ​\\ 
-The figure above shows the EVAL-AD7944/​AD7985/​AD7986EBZ evaluation board. The on-board FPGA, U3, provides the necessary control signals for conversion and deserializes the serial data as the [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] board uses a parallel interface. The evaluation board is a flexible design that enables the user to choose among many different board configurations,​ analog signal conditioning,​ reference, and different modes of conversion data.  + 
-This evaluation board is a 6-layer board carefully laid out and tested to demonstrate the specific high accuracy performance of the [[adi>​AD7944]],​ [[adi>​AD7985]],​ and [[adi>​AD7986]]. ​Figure 23 to Figure 28 show the schematics of the evaluation ​board.+The evaluation board is ideal for use with the Analog Devices Converter and Evaluation Development EVAL-CED1Z (CED). The design offers the flexibility of applying external control signals and is capable of generating conversion results on parallel 16-bit wide buffered outputs.\\  
 + 
 +Figure 2 shows the EVAL-AD7944/​AD7985/​AD7986EBZ evaluation board. The on-board FPGA, U3, provides the necessary control signals for conversion and deserializes the serial data as the [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] board uses a parallel interface. The evaluation board is a flexible design that enables the user to choose among many different board configurations,​ analog signal conditioning,​ reference, and different modes of conversion data.\\  
 + 
 +This evaluation board is a 6-layer board carefully laid out and tested to demonstrate the specific high accuracy performance of the [[adi>​AD7944]],​ [[adi>​AD7985]],​ and [[adi>​AD7986]]. ​See the Design Support Package section for the board schematic and layout.\\
  
 ===== Device Description ===== ===== Device Description =====
-The [[adi>​AD7944]] is a 14-bit, 2.5 MSPS successive approximation analog-to-digital converter (SAR ADC), whereas the [[adi>​AD7985]] is a 16-bit version of the SAR ADC. The [[adi>​AD7986]]is an 18-bit 2 MSPS SAR ADC.  +The [[adi>​AD7944]] is a 14-bit, 2.5 MSPS successive approximation analog-to-digital converter (SAR ADC), whereas the [[adi>​AD7985]] is a 16-bit version of the SAR ADC. The [[adi>​AD7986]] is an 18-bit,  ​2 MSPS SAR ADC. \\ 
-These ADCs are low power and high speed and include an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On the rising edge of CNV, the ADC samples an analog input, IN+, between 0 V and REF with respect to the ground sense, IN−. The ADCs feature a very high sampling rate turbo mode (TURBO is high) and a reduced power normal mode (TURBO is low) for low power applications where the power is scaled with the throughput. A full description of these products is available in their respective data sheets and should be consulted when using this evaluation board.+ 
 +These ADCs are low power and high speed and include an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On the rising edge of CNV, the ADC samples an analog input, IN+, between 0 V and REF with respect to the ground sense, IN−. The ADCs feature a very high sampling rate turbo mode (TURBO is high) and a reduced power normal mode (TURBO is low) for low power applications where the power is scaled with the throughput. A full description of these products is available in their respective data sheets and should be consulted when using this evaluation board.\\
  
 ===== Power Supplies ===== ===== Power Supplies =====
-Power is supplied to the board through ​P3 when used with the [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]]. Each supply is decoupled at the point where it enters the board and again at each device. A single ground plane on this board minimizes the effect of high frequency noise interference. ​+Power is supplied to the board through ​P1 when used with the [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]]. Each supply is decoupled at the point where it enters the board and again at each device. A single ground plane on this board minimizes the effect of high frequency noise interference. ​
  
 ===== Standalone Operation ===== ===== Standalone Operation =====
-The evaluation board can be used in standalone mode without the CED controller board. In this case, power supplies need to be applied to the board at P4 or at the relevant test points. At a minimum, the board requires ±5 V, +12 V, +7 V, or + 2.5 V. See Figure 23 for details regarding power supply connections.+The evaluation board can be used in standalone mode without the CED controller board. In this case, power supplies need to be applied to the board at P4 or at the relevant test points. At a minimum, the board requires ±5 V, +12 V, +7 V, or + 2.5 V. See the Design Support Package section ​for details regarding power supply connections.
  
 ===== Grounding ===== ===== Grounding =====
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 ===== Conversion Control ===== ===== Conversion Control =====
-The on-board FPGA performs a number of digital functions, one of them being the deserialization of the serial conversion results as the CED data capture ​boards ​uses a 16-bit parallel interface. If desired, the deserialized data can be monitored on the 96-pin edge connecter, P1, BD[15:0]. The CED uses a buffered busy signal, BBUSY, as the general interrupt for data. +The on-board FPGA performs a number of digital functions, one of them being the deserialization of the serial conversion results as the CED data capture ​board uses a 16-bit parallel interface. If desired, the deserialized data can be monitored on the 96-pin edge connecter, P1, BD[15:0]. The CED uses a buffered busy signal, BBUSY, as the general interrupt for data. 
  
 ===== Analog Inputs===== ===== Analog Inputs=====
-The analog inputs to the evaluation board are J1, J2, and SMB (push on). These inputs are buffered with dedicated amplifier circuitry (A2, A3, and discretes) to allow configuration changes such as positive or negative gain, input range scaling, filtering, addition of a dc component, and use of different op-amps and supplies. The analog input amplifiers are set as unity-gain buffers at the factory. The supplies are selectable with solder pads and are set for the +7 V to −5 V ranges.  +The analog inputs to the evaluation board are J1, J2, and SMB (push on). These inputs are buffered with dedicated amplifier circuitry (A2, A3, and discretes) to allow configuration changes such as positive or negative gain, input range scaling, filtering, addition of a dc component, and use of different op amps and supplies. The analog input amplifiers are set as unity-gain buffers at the factory. The supplies are selectable with solder pads and are set for the +7 V to −5 V ranges.\\ 
-The default configuration sets both A2 and A3 at midscale generated from either a buffered reference voltage divider or the internal reference of the ADC.  +  
-The evaluation board is factory configured for providing either a single-ended path or a fully differential path. Because the AD7986 is differential,​ both inputs and amplifier circuits are used to buffer the IN+ and IN- inputs of the ADCs. For the AD7944 and AD7985 evaluation boards, only the J2, A3, and associated circuitry is used in the path.  +The default configuration sets both A2 and A3 at midscale generated from either a buffered reference voltage divider or the internal reference of the ADC. \\ 
-For dynamic performance,​ an FFT test can be executed by applying a very low distortion ac source. For low frequency testing, an audio precision source can be used directly because the outputs on these are isolated. Set the audio precision outputs for balanced and floating. Although different sources can be used, most are single ended and use a fixed output resistance. ​+ 
 +The evaluation board is factory configured for providing either a single-ended path or a fully differential path. Because the AD7986 is differential,​ both inputs and amplifier circuits are used to buffer the IN+ and IN- inputs of the ADCs. For the AD7944 and AD7985 evaluation boards, only the J2, A3, and associated circuitry is used in the path. \\ 
 + 
 +For dynamic performance,​ an FFT test can be executed by applying a very low distortion ac source. For low frequency testing, an audio precision source can be used directly because the outputs on these are isolated. Set the audio precision outputs for balanced and floating. Although different sources can be used, most are single ended and use a fixed output resistance. ​\\ 
 Because the evaluation board uses the amplifiers in unity gain, the noninverting input has a common-mode input with a 590 Ω series resistor, which needs to be taken into account when directly connecting a source (voltage divider). Because the evaluation board uses the amplifiers in unity gain, the noninverting input has a common-mode input with a 590 Ω series resistor, which needs to be taken into account when directly connecting a source (voltage divider).
  
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 |DVDD |+2.5 V |ADC DVDD (digital core) supply: selection of 2.5 V or 5 V on the board or externally. To prevent permanent damage to the ADC, do not solder to 5 V or connect this supply to > 2.5 V.| |DVDD |+2.5 V |ADC DVDD (digital core) supply: selection of 2.5 V or 5 V on the board or externally. To prevent permanent damage to the ADC, do not solder to 5 V or connect this supply to > 2.5 V.|
 |BVDD |+5 V |ADC BVDD 5 V supply: selection of 5 V on the board or externally. For an external reference, the best performance is obtained when the reference source that is connected to the REF pins and BVDD are the same. See the External Reference: Factory Configuration section for details.| |BVDD |+5 V |ADC BVDD 5 V supply: selection of 5 V on the board or externally. For an external reference, the best performance is obtained when the reference source that is connected to the REF pins and BVDD are the same. See the External Reference: Factory Configuration section for details.|
-|VIO |+2.5 V |ADC digital input/​output supply voltage: selection of 2.5 V or 3.3 V {on board?}or externally. |+|VIO |+2.5 V |ADC digital input/​output supply voltage. |
 Solder pads are factory configured for the device being evaluated. Solder pads are factory configured for the device being evaluated.
  
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 ==== External Reference: Factory Configuration ==== ==== External Reference: Factory Configuration ====
-The evaluation board includes the ADR435 which is a 5 V precision voltage reference. This reference can drive the ADCs and the REF pin directly or it can be buffered with the AD8032; both of which serve as the factory default setting. The best attainable SNR is achieved by using the maximum reference voltage of 5 V (see the appropriate ADC datasheet for details). ​+The evaluation board includes the [[adi>ADR435]] which is a 5 V precision voltage reference. This reference can drive the ADCs and the REF pin directly or it can be buffered with the [[adi>AD8032]]; both of which serve as the factory default setting. The best attainable SNR is achieved by using the maximum reference voltage of 5 V (see the appropriate ADC datasheet for details). ​
  
 == Table 3. Factory Reference Jumper Configuration == == Table 3. Factory Reference Jumper Configuration ==
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 |BVDD |5 V (factory default)| |BVDD |5 V (factory default)|
  
-The second method is to use the U2 op amp to voltage divide down the 5 V output of the ADR435 to 1.2 V by using R2/R4 = 1 kΩ/316 Ω. To use this method, replace R4 and set the jumpers to the settings listed in Table 6.+The second method is to use the U2 op amp to voltage divide down the 5 V output of the [[adi>ADR435]] to 1.2 V by using R2/R4 = 1 kΩ/316 Ω. To use this method, replace R4 and set the jumpers to the settings listed in Table 6.
 == Table 6. Fully External Reference Buffer Jumper Configuration:​ Divide Down Method == == Table 6. Fully External Reference Buffer Jumper Configuration:​ Divide Down Method ==
  
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 |P9 |REFS to VREF| |P9 |REFS to VREF|
 |P10 |BUF to middle| |P10 |BUF to middle|
-|P11 |REFIN to pin 1|+|P11 |REFIN to Pin 1|
 |P12 |PDREF to VIO| |P12 |PDREF to VIO|
 |BVDD |5 V (factory default)| |BVDD |5 V (factory default)|
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 ==== Software Installation ==== ==== Software Installation ====
-It is recommended to close all Windows© ​applications prior to installing the software.  +It is recommended to close all Windows® ​applications prior to installing the software.  
-The evaluation board comes with a CD as part of the evaluation kit. The latest software versions are always available from the Analog Devices product page, visit www.analog.com. Note that the user must accept the license agreement during the installation process.+The evaluation board comes with a CD as part of the evaluation kit. The latest software versions are always available from the Analog Devices product page, visit [[www.analog.com]]. Note that the user must accept the license agreement during the installation process.\\
  
 {{ :​resources:​eval:​10387-003.jpg?​300 |}} {{ :​resources:​eval:​10387-003.jpg?​300 |}}
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 After downloading the software, it is recommended to use the WinZip extract function to extract all of the necessary components rather than immediately selecting **setup.exe** from within the zipped file.  After downloading the software, it is recommended to use the WinZip extract function to extract all of the necessary components rather than immediately selecting **setup.exe** from within the zipped file. 
-After extracting the software, click **setup.exe** in the folder created during the extraction process and follow the instructions on the screen.  +After extracting the software, click **setup.exe** in the folder created during the extraction process and follow the instructions on the screen. ​\\ 
-If another version of the software already exists on the computer, it may be necessary to remove it. To remove prior versions of the software, click the Windows **Start** button, select **Control Panel**, and then select **Add or Remove Programs**. When the list populates, navigate to **Analog Devices High Resolution sampling ADC’s Evaluation Software** or **PulSAR Evaluation Software** and select Remove. ​+ 
 +If another version of the software already exists on the computer, it may be necessary to remove it. To remove prior versions of the software, click the Windows **Start** button, select **Control Panel**, and then select **Add or Remove Programs**. When the list populates, navigate to **Analog Devices High Resolution sampling ADC’s Evaluation Software** or **PulSAR Evaluation Software** and select ​**Remove**\\
  
 === Typical Install Process === === Typical Install Process ===
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 ==== USB Drivers ==== ==== USB Drivers ====
-The software also installs the necessary USB drivers through a separate installation process. When the software installation completes the drivers installation wizard displays: click Install to install the drivers automatically,​ as shown in Figure 8 and Figure 9.+The software also installs the necessary USB drivers through a separate installation process. When the software installation completes the drivers installation wizard displays: click **Install** to install the drivers automatically,​ as shown in Figure 8 and Figure 9.
  
  {{ :​resources:​eval:​10387-008.jpg?​300 |}}  {{ :​resources:​eval:​10387-008.jpg?​300 |}}
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 **//Figure 9. Install Complete//​** **//Figure 9. Install Complete//​**
  
-After installing the software and drivers, power the CED board and connect it to the PC USB 2.0 port, at which time the Welcome to the Found New Hardware Wizard initiates. ​+After installing the software and drivers, power the CED board and connect it to the PC USB 2.0 port, at which time the **Welcome to the Found New Hardware Wizard** initiates. ​
  {{ :​resources:​eval:​10387-010.jpg?​300 |}}  {{ :​resources:​eval:​10387-010.jpg?​300 |}}
 **//Figure 10. Found New Hardware//​** **//Figure 10. Found New Hardware//​**
  
-When installed properly, the hardware wizard displays the following message shown in Figure 11 signaling that the evaluation board software is setup and ready to use.+When installed properly, the hardware wizard displays the following messageshown in Figure 11signaling that the evaluation board software is setup and ready to use.
 {{ :​resources:​eval:​10387-011.jpg?​300 |}} {{ :​resources:​eval:​10387-011.jpg?​300 |}}
 **//Figure 11. Evaluation Board Software Installation Complete//​** **//Figure 11. Evaluation Board Software Installation Complete//​**
  
-On some PCs, the Found New hardware Wizard may show up again and, if so, follow the same procedure to install it properly. ​The Device Manager, shown in Figure 12, can be used to verify that the driver was installed correctly.+On some PCs, the **Found New hardware Wizard** may show up again and, if so, follow the same procedure to install it properly. ​Use the **Device Manager**, shown in Figure 12, to verify that the driver was installed correctly.
 {{ :​resources:​eval:​10387-012.jpg?​300 |}} {{ :​resources:​eval:​10387-012.jpg?​300 |}}
 **//Figure 12. Device Manager Verification//​** **//Figure 12. Device Manager Verification//​**
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 === Troubleshooting the Installation === === Troubleshooting the Installation ===
  
-If the driver was not installed properly, Windows does not recognize the CEDIZ board and the Device Manager menu displays a question mark for Other devices. ​+If the driver was not installed properly, Windows does not recognize the CEDIZ board and the Device Manager menu displays a question mark for **Other devices**
 {{ :​resources:​eval:​10387-013.jpg?​300 |}} {{ :​resources:​eval:​10387-013.jpg?​300 |}}
 **//Figure 13. Device Manager Menu Displaying Unrecognized Device//** **//Figure 13. Device Manager Menu Displaying Unrecognized Device//**
  
-The USB Device ​can be opened to view its uninstalled properties, as shown in Figure 14. +The USB device ​can be opened to view its uninstalled properties, as shown in Figure 14. 
 {{ :​resources:​eval:​10387-014.jpg?​300 |}} {{ :​resources:​eval:​10387-014.jpg?​300 |}}
 //**Figure 14. USB Device Uninstalled Properties**//​ //**Figure 14. USB Device Uninstalled Properties**//​
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-==== Running the evaluation software ​====+==== Running the Evaluation Software ​====
  
-The evaluation board includes software for analyzing the AD7944, AD7985, and AD7986. The [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] is required when using the software. Use the software to perform the following tests: +The evaluation board includes software for analyzing the AD7944, AD7985, and AD7986. The [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] is required when using the software. Use the software to perform the following tests:\\ 
-  * Histogram for determining code transition noise (dc). + 
-  * Fast Fourier transforms (FFT) for signal-to-noise ratio (SNR), SNR and signal-to-noise-and-distortion (SINAD), total harmonic distortion (THD), and spurious free dynamic range (SFDR). +  * Histogram for determining code transition noise (dc).\\ 
-  * Decimation (digital filtering). +  * Fast Fourier transforms (FFT) for signal-to-noise ratio (SNR), SNR and signal-to-noise-and-distortion (SINAD), total harmonic distortion (THD), and spurious free dynamic range (SFDR).\\ 
-The software is located at <​local_drive>:​\Program Files\Analog Devices\PulSAR ADC Evaluation Software\Eval PulSAR CED.exe. A shortcut is also added to the Windows Start menu under Analog Devices PulSAR Evaluation Software, Eval PulSAR CED. +  * Decimation (digital filtering).\\ 
 +  *  
 +The software is located at <​local_drive>:​\Program Files\Analog Devices\PulSAR ADC Evaluation Software\Eval PulSAR CED.exe. A shortcut is also added to the Windows ​**Start** menu under **Analog Devices PulSAR Evaluation Software, Eval PulSAR CED**
 To run the software, select the program from either location. To run the software, select the program from either location.
  
 ==== Running the ADC Analysis Software ==== ==== Running the ADC Analysis Software ====
-The evaluation board includes software for analyzing the AD7944, AD7985, and AD7986 ADCs. The [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] is required when using the ADC analysis software. Use the software to perform the following tests:+The evaluation board includes software for analyzing the [[adi>AD7944]][[adi>AD7985]], and [[adi>AD7986]] ADCs. The [[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]] is required when using the ADC analysis software. Use the software to perform the following tests:\\ 
   * Histogram for determining code transition noise (dc).   * Histogram for determining code transition noise (dc).
-  * FFT for SNR, SNR and SINAD, THD, and SFDR. +  * FFT for SNR, SNR and SINAD, THD, and SFDR.\\ 
-Refer to Figure 15 to Figure 20 for additional details and features of the software.  +  *  
-The ADC analysis software is located at C:\Program Files\Analog Devices\ PulSAR ADC Evaluation Software\Eval PulSAR CED.exe. +Refer to Figure 15 to Figure 20 for additional details and features of the software.\\ 
-A shortcut is also added to the Windows Start menu under Analog Devices PulSAR ADC Evaluation Software, Eval PulSAR CED.  +  
-To run the software, select the program from either location.+The ADC analysis software is located at C:\Program Files\Analog Devices\ PulSAR ADC Evaluation Software\Eval PulSAR CED.exe. A shortcut is also added to the Windows ​**Start** menu under **Analog Devices PulSAR ADC Evaluation Software, Eval PulSAR CED.** To run the software, select the program from either location.
  
 ===== Software Operation ===== ===== Software Operation =====
 The following steps detail the operation of the software located in the default directory: The following steps detail the operation of the software located in the default directory:
-<​local_drive>:​\Program Files\Analog Devices\PulSAR ADC Evaluation Software\Eval PulSAR CED.exe, which opens the Raw Data Capture window.+<​local_drive>:​\Program Files\Analog Devices\PulSAR ADC Evaluation Software\Eval PulSAR CED.exe, which opens the **Raw Data Capture** window.
  
 {{ :​resources:​eval:​10387-015.jpg?​700 |}} {{ :​resources:​eval:​10387-015.jpg?​700 |}}
 //**Figure 15. Setup Screen**// //**Figure 15. Setup Screen**//
  
-  - To start the software, click the arrow   (see the area in Figure 15 marked with the Number 1). +  - To start the software, click the arrow in the upper left corner of the screen. When running, the arrow icon is displayed as shown in the area in Figure 15 marked with the Number 1.    ​
-    - When running, the following arrow icon is displayed:  ​+
   - Select the device to be evaluated (see the area in Figure 15 marked with the Number 2).   - Select the device to be evaluated (see the area in Figure 15 marked with the Number 2).
   - Set the controls (see the area in Figure 15 marked with the Number 3) for the following:   - Set the controls (see the area in Figure 15 marked with the Number 3) for the following:
-    - Sample Frequency: Enter the sample rate in kHz. Units can be used such as 10k (case sensitive) for 10,000,000 Hz or 10 MSPS. +    - **Sample Frequency:** Enter the sample rate in kHz. Units can be used such as 10k (case sensitive) for 10,000,000 Hz or 10 MSPS. 
-    - Input Range: Because the ADCs have a variable input range depending on the reference voltage, select the correct one (4.096 V or 5 V) {the screen shot in Figure 15 shows this to be ±5V, which is correct?​} ​to display the correct LSB size. +    - **Input Range:** Because the ADCs have a variable input range depending on the reference voltage, select the correct one (4.096 V or 5 V) to display the correct LSB size. 
-    - Interface Mode: Options for using or not using the busy mode. In busy mode, the SDO can be monitored to see the actual conversion time (BUSY {is this a pin?} high to low transition). +    - **Interface Mode:** Options for using or not using the busy mode. In busy mode, the SDO can be monitored to see the actual conversion time (BUSY high to low transition). 
-    - Turbo CTRL: Select the fastest mode, turbo mode, or normal mode. Note that the throughput must be manually changed when changing modes. ​The  +    - **Turbo CTRL:** Select the fastest mode, turbo mode, or normal mode. Note that the throughput must be manually changed when changing modes. ​  
-    - CNV Mode: Selects between continuous (Cont. ​Cnv) or burst conversion ​({Burst Cnv?​}) ​modes. In continuous mode, the ADC is continuously converting. In burst mode, the ADC does not continuously convert. +    - **CNV Mode:** Selects between continuous (Cont.) or burst conversion modes. In continuous mode, the ADC is continuously converting. In burst mode, the ADC does not continuously convert. 
-    - Coding: For the AD7986, 2 compl must be selected in the Coding field because the ADC result is always twos complement. For the AD7985 and AD7944, binary ​{is this how the binary selection displays in the Coding box, or is it an abbreviation like 2 compl?​} ​is set because the ADC output is straight binary.  +    - **Coding:** For the AD7986, ​**2 compl** must be selected in the **Coding** field because the ADC result is always twos complement. For the AD7985 and AD7944, binary is set because the ADC output is straight binary.  
-  - Use the controls shown in the area of Figure 15 marked with the Number 4 for functions such saving, printing, help, and so forth. These functions are also accessible from the File menu. +  - Use the controls shown in the area of Figure 15 marked with the Number 4 for functions such saving, printing, help, and so forth. These functions are also accessible from the **File** menu. 
-    - Save (F5): In the Save (F5) pull-down menu, there are several options as follows: +    - **Save (F5):** In the **Save** **(F5)** pull-down menu, there are several options as follows: 
-      - LV Config: selects the LabView ​configuration,​ which allows the current configuration to be saved to a filename.dat file. This option is useful when changing many of the default controls. To load the saved configuration,​ click the Load Previous Configuration located above Save (F5). +      - **LV Config:** selects the LabVIEW® ​configuration,​ which allows the current configuration to be saved to a filename.dat file. This option is useful when changing many of the default controls. To load the saved configuration,​ click **Load Previous Configuration** located above **Save (F5)**
-      - Html: saves the current screen shot to an html file. +      - **Html:** saves the current screen shot to an html file. 
-      - Spreadsheet:​ saves the current data displayed in the chart in a tab delimited spreadsheet. Raw ADC data includes time domain (in V or code), FFT, or decimated (in dB).  +      - **Spreadsheet:​** saves the current data displayed in the chart in a tab delimited spreadsheet. Raw ADC data includes time domain (in V or code), FFT, or decimated (in dB).  
-    - Stop (F10): Click Stop (F10) to stop running the software. Likewise, clicking the stop sign icon,   ​on the top menu bar also stops the software.  +    - **Stop (F10):** Click **Stop (F10)** to stop running the software. Likewise, clicking the stop sign icon, on the top menu bar also stops the software.  
-    - RESET: click RESET to reset the CED capture board.+    - **RESET:** click **RESET** to reset the CED capture board.
  
 ===== Context Help ===== ===== Context Help =====
 ==== On-Screen Help ==== ==== On-Screen Help ====
-To use the on-screen help. Select Help, Show Context Help or click Help (F1).These function areas on the screen are indicated by Number 1 in Figure 16. Hovering the cursor over most screen items displays useful information for the particular control or displayed unit.+To use the on-screen help. Select ​**Help****Show Context Help** or click **Help (F1)**. These function areas on the screen are indicated by Number 1 in Figure 16. Hovering the cursor over most screen items displays useful information for the particular control or displayed unit.\\
  
 {{ :​resources:​eval:​10387-016.jpg?​700 |}} {{ :​resources:​eval:​10387-016.jpg?​700 |}}
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 === Histogram Controls === === Histogram Controls ===
-The histogram controls, shown in the area indicated by Number 2 in Figure 16, are used for axes and zooming panning, as follows:+The histogram controls, shown in the area indicated by Number 2 in Figure 16, are used for axes and zooming panning, as follows:\\ 
 == Graph Axis Lock == == Graph Axis Lock ==
-Locks the graph axis to automatically fit the data. +Locks the graph axis to automatically fit the data.\\ 
   ​   ​
 == Axis Rescaling == == Axis Rescaling ==
-Uses the last axis set by the user. These allow user to rescale the x- and y-axis, respectively,​ to the automatic values.+Uses the last axis set by the user. These allow the user to rescale the x- and y-axis, respectively,​ to the automatic values.\\
   ​   ​
 == Axis Properties == == Axis Properties ==
-These are used to set the x- and y-axis properties, such as format, precision, color, and so forth.+These are used to set the x- and y-axis properties, such as format, precision, color, and so forth.\\
  
 == Cursor Display == == Cursor Display ==
-Displays the cursor.+Displays the cursor.\\
   ​   ​
 == Zooming == == Zooming ==
-Is used for zooming ​in and out.+Zooms in and out.\\
  
 == Panning == == Panning ==
-Is used for panning.+Use to pan.\\
  
 == Graph Properties == == Graph Properties ==
-Is used to set various graph properties such as graph type, colors, lines, and so forth.+Sets various graph properties such as graph type, colors, lines, and so forth.
   ​   ​
 ==== Histogram and Oscilloscope Charts ==== ==== Histogram and Oscilloscope Charts ====
  
-The areas of the Raw Data Capture window that pertain to working with histogram or oscilloscope charts are demarcated by the sections numbered 1, 2, and 3 in Figure 17. +The areas of the **Raw Data Capture** window that pertain to working with histogram or oscilloscope charts are demarcated by the sections numbered 1, 2, and 3 in Figure 17. \\ 
 {{ :​resources:​eval:​10387-017.jpg?​700 |}}  {{ :​resources:​eval:​10387-017.jpg?​700 |}} 
 **//Figure 17. Histogram Data Window//** **//Figure 17. Histogram Data Window//**
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 ==== Single or Continuous Capture ==== ==== Single or Continuous Capture ====
  
-Use the buttons shown in Section 1 in Figure 17 to perform either a single capture or continuous capture of data. Enter the number of samples that are required in the # of Samples (k) field (located to the left of the Single Capture (F3) button). The statistics for the x- and y-axes are displayed in the Histogram Data section of the window, shown as the Number 2 and Number 3 areas within Figure 17. +Use the buttons shown in Section 1 in Figure 17 to perform either a single capture or continuous capture of data. Enter the number of samples that are required in the **# of Samples (k)** field (located to the left of the **Single Capture (F3)** button). The statistics for the x- and y-axes are displayed in the **Histogram Data** section of the window, shown as the Number 2 and Number 3 areas within Figure 17.\\ 
-The graphic results are displayed in the chart area of the window. Note that the results can be displayed as either a histogram (see Figure 18) or an oscilloscope (see Figure 19) by selecting the relevant tab, Oscilloscope,​ above the chart display (shown as Number 1 in Figure 20). Time domain data can also be viewed by using the Oscilloscope tab. In addition, the charts can be displayed together when the Summary tab is selected (see Figure 21).+ 
 +The graphic results are displayed in the chart area of the window. Note that the results can be displayed as either a histogram (see Figure 18) or an oscilloscope (see Figure 19) by selecting the relevant tab, **Oscilloscope**, above the chart display (shown as Number 1 in Figure 20). \\ 
 + 
 +Time domain data can also be viewed by using the **Oscilloscope** tab. In addition, the charts can be displayed together when the **Summary** tab is selected (see Figure 21).\\ 
 {{ :​resources:​eval:​10387-018.jpg?​400 |}} {{ :​resources:​eval:​10387-018.jpg?​400 |}}
-**//Figure 18. Histogram Chart Display//**+**//Figure 18. Histogram Chart Display//**\\ 
  
 {{ :​resources:​eval:​10387-019.jpg?​400 |}} {{ :​resources:​eval:​10387-019.jpg?​400 |}}
-//**Figure 19. Oscilloscope Chart Display (Time Domain)**//+//**Figure 19. Oscilloscope Chart Display (Time Domain)**//\\ 
 {{ :​resources:​eval:​10387-020.jpg?​700 |}} {{ :​resources:​eval:​10387-020.jpg?​700 |}}
-**//Figure 20. Oscilloscope//​**+**//Figure 20. Oscilloscope//​**\\
  
 {{ :​resources:​eval:​10387-021.jpg?​700 |}} {{ :​resources:​eval:​10387-021.jpg?​700 |}}
-//**Figure 21. Summary Tab**//+//**Figure 21. Summary Tab**//\\ 
  
 == FFT Spectrum Data == == FFT Spectrum Data ==
-To review the FFT spectrum data, select the Spectrum tab in the Raw Data Capture window. Figure 22 shows the FFT spectrum window and sections numbered 1, 2, and 3 of this window are described as follows:+To review the FFT spectrum data, select the **Spectrum** tab in the **Raw Data Capture** window. Figure 22 shows the FFT spectrum window and sections numbered 1, 2, and 3 of this window are described as follows:\\ 
 == Displaying the FFT == == Displaying the FFT ==
  
-From the Raw Data Capture window, in the section of Figure 22 labeled with Number 1, select the Spectrum tab to display the FFT when the spectrum chart is selected.+From the **Raw Data Capture** window, in the section of Figure 22 labeled with Number 1, select the **Spectrum** tab to display the FFT when the spectrum chart is selected.\\ 
 == Displaying the Spectrum Data == == Displaying the Spectrum Data ==
  
-The Spectrum Data section (numbered ​2 and 3 in Figure 22), is located beneath the spectrum chart. These areas of the Spectrum Data section display the data for the x-axis (shown in the area labeled as 2) and y-axis, (shown in the area labeled as 3).+The **Spectrum Data** section (Number ​2 and Number ​3 in Figure 22), is located beneath the spectrum chart. These areas of the **Spectrum Data** section display the data for the x-axis (shown in the area labeled as Number ​2) and y-axis, (shown in the area labeled as Number ​3).\\
  
 {{ :​resources:​eval:​10387-022.jpg?​700 |}} {{ :​resources:​eval:​10387-022.jpg?​700 |}}
 **//Figure 22. FFT Spectrum//​** **//Figure 22. FFT Spectrum//​**
 +\\
 ====== Troubleshooting ====== ====== Troubleshooting ======
    
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   * Always install the software from the CD or the Analog Devices website prior to connecting hardware to the PC.    * Always install the software from the CD or the Analog Devices website prior to connecting hardware to the PC. 
-  * Always allow the install ​to fully complete (the software is a two part install: the ADC software and the drivers). The install ​may require a restart of the PC. +  * Always allow the installation ​to fully complete (the software is a two part installation: the ADC software and the drivers). The installation ​may require a restart of the PC. 
-  * When you first plug in the board via the USB cable, allow the New Found Hardware Wizard to run completely. Though this may take some time, it is required prior to starting the software.  +  * When you first plug in the board via the USB cable, allow the **New Found Hardware Wizard** to run completely. Though this may take some time, it is required prior to starting the software.  
-  * Where the board does not appear to be functioning,​ ensure the following: that the ADC evaluation board is connected to the CED board, the daughter card is connected, and the board is being recognized in the Device Manager, as described in the Troubleshooting the Install section.+  * Where the board does not appear to be functioning,​ ensure the following: that the ADC evaluation board is connected to the CED board, the daughter card is connected, and the board is being recognized in the **Device Manager**, as described in the Troubleshooting the Install section.
  
 ===== Hardware Tips ===== ===== Hardware Tips =====
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 If there are issues getting SNR performance,​ note the following: If there are issues getting SNR performance,​ note the following:
   * Some signal sources may require a filter in series to achieve performance. The SNR measurements for this board were tested with the AP-2322 signal source. This is a high performance audio analyzer and source. ​   * Some signal sources may require a filter in series to achieve performance. The SNR measurements for this board were tested with the AP-2322 signal source. This is a high performance audio analyzer and source. ​
-  * To achieve best SNR performance,​ ensure that the signal amplitude is sufficient to deliver a full-scale input range to the ADC. Monitor the maximum and minimum amplitude or fundamental amplitude in the Spectrum tab. Ideally, the fundamental should provide a full-scale swing; therefore, adjust the signal source output to cover the full-scale range.+  * To achieve best SNR performance,​ ensure that the signal amplitude is sufficient to deliver a full-scale input range to the ADC. Monitor the maximum and minimum amplitude or fundamental amplitude in the **Spectrum** tab. Ideally, the fundamental should provide a full-scale swing; therefore, adjust the signal source output to cover the full-scale range.
  
 ====== Design Support Package ====== ====== Design Support Package ======
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 ^Resource ^Description^ ^Resource ^Description^
-|[[adi>​AD7944]]| Product Page, AD7944, 14-bit 2.5 MSPS ADC with internal reference | +|[[adi>​AD7944]]| Product Page, AD7944, 14-bit2.5 MSPS ADC with internal reference | 
-|[[adi>​AD7985]]|Product Page, AD7985, 16-bit 2.5 MSPS ADC with internal reference | +|[[adi>​AD7985]]|Product Page, AD7985, 16-bit2.5 MSPS ADC with internal reference | 
-|[[adi>​AD7986]]|Product Page, AD7986, 18-bit 2 MSPS differential input ADC with internal reference |+|[[adi>​AD7986]]|Product Page, AD7986, 18-bit2 MSPS differential input ADC with internal reference |
 |[[adi>​AD8021]]|Product Page, AD8021, low noise, high speed amplifier| |[[adi>​AD8021]]|Product Page, AD8021, low noise, high speed amplifier|
 |[[adi>​AD8032]]|Product Page, AD8031/32, low power, low noise amplifier | |[[adi>​AD8032]]|Product Page, AD8031/32, low power, low noise amplifier |
 |[[adi>​ADA4899-1]]|Product Page, ADA4899-1, low noise, high speed amplifier | |[[adi>​ADA4899-1]]|Product Page, ADA4899-1, low noise, high speed amplifier |
-|[[adi>​ADR435]]|Product Page, ADR435, unity-gain stable, ultralow ​distortion 1 nV/√Hz, high speed op-amp|+|[[adi>​ADR435]]|Product Page, ADR435, ultralow ​noise XFET voltage reference with current sink and source capability|
 |[[adi>​ADP1715]]|Product Page, high accuracy low IQ, 500 mA, ANYCAP®, adjustable low dropout regulator | |[[adi>​ADP1715]]|Product Page, high accuracy low IQ, 500 mA, ANYCAP®, adjustable low dropout regulator |
 |[[adi>​ADP3334]]|Product Page, ADP3334, 500 mA low dropout CMOS linear regulator with soft start| |[[adi>​ADP3334]]|Product Page, ADP3334, 500 mA low dropout CMOS linear regulator with soft start|
 |[[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]]|Product Page, converter and evaluation development board| |[[adi>​en/​analog-to-digital-converters/​ad-converters/​eval-ced/​products/​product.html|EVAL-CED1Z]]|Product Page, converter and evaluation development board|
-|AN-931|Application Note, understanding ​PulSAR ADC support circuitry+|[[adi>AN-931]]|Application Note, //​Understanding ​PulSAR ADC Support Circuitry//
-|AN-932|Application Note, power supply sequencing|+|[[adi>AN-932]]|Application Note, //Power Supply Sequencing//​|
resources/eval/eval-ad7944_85_86edz.1335264193.txt.gz · Last modified: 24 Apr 2012 12:43 (external edit)