Wiki

Analog Devices Wiki

English
English
简体中文
简体中文
日本語
日本語
Руccкий
Руccкий

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
Next revisionBoth sides next revision
resources:eval:user-guides:adar2001-evalz [26 Mar 2019 20:27] – Move figure 6 Weston Sapiaresources:eval:user-guides:adar2001-evalz [04 May 2020 22:57] – Make ADAR2001 references links to product page and add datasheet link Weston Sapia
Line 1: Line 1:
 ====== EVALUATING THE ADAR2001 4-CHANNEL 4x FREQUENCY MULTIPLIER/FILTER ====== ====== EVALUATING THE ADAR2001 4-CHANNEL 4x FREQUENCY MULTIPLIER/FILTER ======
 ====== GENERAL DESCRIPTION ====== ====== GENERAL DESCRIPTION ======
-The ADAR2001-EVALZ evaluation board is designed for testing the performance of the ADAR2001. The ADAR2001 is a 4-channel 4x Frequency Multiplier/Filter designed for mmWave security imaging applications. All RF input/outputs are brought out to 2.92mm (K) coaxial connectors. On-board logic level translators convert between the external logic level and the on-chip level of 1.8V.+The ADAR2001-EVALZ evaluation board is designed for testing the performance of the [[adi>adar2001|ADAR2001]]. The [[adi>adar2001|ADAR2001]] is a 4-channel 4x Frequency Multiplier/Filter designed for mmWave security imaging applications. All RF input/outputs are brought out to 2.92mm (K) coaxial connectors. On-board logic level translators convert between the external logic level and the on-chip level of 1.8V.
  
 There is an [[adi>SDP|Analog Devices System Demonstration Platform (SDP)]] connector which can be used in conjunction with an [[adi>SDP|SDP]] controller board to manipulate the internal registers as well as cycle through the programmed modes of the two internal state machines. There is an [[adi>SDP|Analog Devices System Demonstration Platform (SDP)]] connector which can be used in conjunction with an [[adi>SDP|SDP]] controller board to manipulate the internal registers as well as cycle through the programmed modes of the two internal state machines.
  
-The ADAR2001 has two integrated state machines, one for the Multiplier section and another for the Transmitter section. The sequencers are configured through the SPI, and can be used to quickly cycle through pre-programmed states. These sequencers can be exercised in one of two ways:+The [[adi>adar2001|ADAR2001]] has two integrated state machines, one for the Multiplier section and another for the Transmitter section. The sequencers are configured through the SPI, and can be used to quickly cycle through pre-programmed states. These sequencers can be exercised in one of two ways:
   - External Advance and Reset Pins:   - External Advance and Reset Pins:
       * TxADV - Transmitter Advance (Pin 8)       * TxADV - Transmitter Advance (Pin 8)
Line 27: Line 27:
   * Power Supply: 2.5V, ≥ 1A   * Power Supply: 2.5V, ≥ 1A
 ===== Documents ===== ===== Documents =====
-  * ADAR2001 Datasheet+  * [[adi>media/en/technical-documentation/data-sheets/ADAR2001.pdf|ADAR2001 Datasheet]]
 ===== Software ===== ===== Software =====
   * [[adi>ace|Analog Devices, Inc., Analysis | Control | Evaluation (ACE)]]   * [[adi>ace|Analog Devices, Inc., Analysis | Control | Evaluation (ACE)]]
Line 40: Line 40:
 The ADAR2001-EVALZ board must be powered from an external power supply with a voltage level of 2.5V. This power supply must have a current capability of at least 1A. The ADAR2001-EVALZ board must be powered from an external power supply with a voltage level of 2.5V. This power supply must have a current capability of at least 1A.
  
-There is an on-board LDO (U105) which generates the 1.8V required to safely drive the digital pins of the ADAR2001. This supply has an associated jumper, JP1, which can be used to enable and disable the 1.8V supply.+There is an on-board LDO (U105) which generates the 1.8V required to safely drive the digital pins of the [[adi>adar2001|ADAR2001]]. This supply has an associated jumper, JP1, which can be used to enable and disable the 1.8V supply.
  
 ===== RF Input and Output Signals ===== ===== RF Input and Output Signals =====
Line 59: Line 59:
  
 ===== Digital Signals ===== ===== Digital Signals =====
-The [[adi>sdp|SDP]] board operates with logic levels of 3.3V, while the ADAR2001 requires logic levels of 1.8V. To protect the ADAR2001, level translators (U102, U103, U104) have been included between the [[adi>sdp|SDP]] connector and the rest of the board. If digital signals are applied using any method below other than the [[adi>sdp|SDP]] connector, the applied logic levels must be set to 1.8V. Violating this could stress the ADAR2001 beyond it’s designed limits and could result in permanent damage to the part. +The [[adi>sdp|SDP]] board operates with logic levels of 3.3V, while the [[adi>adar2001|ADAR2001]] requires logic levels of 1.8V. To protect the [[adi>adar2001|ADAR2001]], level translators (U102, U103, U104) have been included between the [[adi>sdp|SDP]] connector and the rest of the board. If digital signals are applied using any method below other than the [[adi>sdp|SDP]] connector, the applied logic levels must be set to 1.8V. Violating this could stress the [[adi>adar2001|ADAR2001]] beyond it’s designed limits and could result in permanent damage to the part. 
-The level translator ICs have two separate supply voltages, one per side, which are used to set the logic level for that side of the translator. The [[adi>sdp|SDP]] side voltage level is 3.3V and is taken directly from the [[adi>sdp|SDP]] interface board. The ADAR2001 side voltage level is 1.8V and is taken from the on-board LDO, U105. To use this [[adi>sdp|SDP]] interface, the 1.8V rail must be enabled using jumper JP1.+The level translator ICs have two separate supply voltages, one per side, which are used to set the logic level for that side of the translator. The [[adi>sdp|SDP]] side voltage level is 3.3V and is taken directly from the [[adi>sdp|SDP]] interface board. The [[adi>adar2001|ADAR2001]] side voltage level is 1.8V and is taken from the on-board LDO, U105. To use this [[adi>sdp|SDP]] interface, the 1.8V rail must be enabled using jumper JP1.
  
 ==== SPI Control ==== ==== SPI Control ====
 The ADAR2001-EVALZ board SPI interface is meant to be driven using the [[adi>sdp|SDP]] connector, P101, however, test points are also provided as an alternative. The test points are labelled with the SPI signal names (SCLK, SDIO, CSB, SDO). The ADAR2001-EVALZ board SPI interface is meant to be driven using the [[adi>sdp|SDP]] connector, P101, however, test points are also provided as an alternative. The test points are labelled with the SPI signal names (SCLK, SDIO, CSB, SDO).
  
-The test point signals are not routed through level translators to protect the ADAR2001 in case of an overvoltage scenario. Therefore, if these test points are used to drive the SPI, the input logic level must be set to 1.8V. This was done to provide a simple interface which isn’t limited in speed by the translator devices.+The test point signals are not routed through level translators to protect the [[adi>adar2001|ADAR2001]] in case of an overvoltage scenario. Therefore, if these test points are used to drive the SPI, the input logic level must be set to 1.8V. This was done to provide a simple interface which isn’t limited in speed by the translator devices.
  
 ==== State Machine Control ==== ==== State Machine Control ====
-The ADAR2001-EVALZ board has multiple interfaces for driving the ADAR2001’s internal state machines. The [[adi>sdp|SDP]] controller board can activate these lines both through the SPI interface, or through the GPIO pins on the [[adi>sdp|SDP]] connector, P101. Test points are also provided as an alternative and are labelled with the signal names (MRST, TxRST, MADV, TxADV). The reset lines (MRST, TxRST) also have pushbuttons (S1, S2) that can be used to reset the sequencers by hand. The advance lines (MADV, TxADV) also have surface mount SMA connectors (J11, J12) to provide the highest speed interface for cycling through the sequencer states.+The ADAR2001-EVALZ board has multiple interfaces for driving the [[adi>adar2001|ADAR2001]]’s internal state machines. The [[adi>sdp|SDP]] controller board can activate these lines both through the SPI interface, or through the GPIO pins on the [[adi>sdp|SDP]] connector, P101. Test points are also provided as an alternative and are labelled with the signal names (MRST, TxRST, MADV, TxADV). The reset lines (MRST, TxRST) also have pushbuttons (S1, S2) that can be used to reset the sequencers by hand. The advance lines (MADV, TxADV) also have surface mount SMA connectors (J11, J12) to provide the highest speed interface for cycling through the sequencer states.
  
 Only the signals in/out of the [[adi>sdp|SDP]] connector are routed through the level translation circuitry. Therefore, if either the test points or SMA connectors are used to drive the sequencer control lines, the input logic level must be set to 1.8V. Only the signals in/out of the [[adi>sdp|SDP]] connector are routed through the level translation circuitry. Therefore, if either the test points or SMA connectors are used to drive the sequencer control lines, the input logic level must be set to 1.8V.
Line 83: Line 83:
   - Connect the power supply to J10. Leave the supply disabled.   - Connect the power supply to J10. Leave the supply disabled.
   - Connect the RF signal generator to J9. Leave the generator output disabled.   - Connect the RF signal generator to J9. Leave the generator output disabled.
-  - Connect the spectrum analyzer to any RF output connector (J1-J8). Note that it is best practice to differentially test the ADAR2001 using a balun or hybrid coupler, but it isn't required. If testing single-ended, be sure to terminate the unused output in 50Ω.+  - Connect the spectrum analyzer to any RF output connector (J1-J8). Note that it is best practice to differentially test the [[adi>adar2001|ADAR2001]] using a balun or hybrid coupler, but it isn't required. If testing single-ended, be sure to terminate the unused output in 50Ω.
   - Set the power supply to deliver a 2.5V rail with a current limit of 500mA.   - Set the power supply to deliver a 2.5V rail with a current limit of 500mA.
   - Check that JP1 is in position to enable the 1.8V digital supply voltage.   - Check that JP1 is in position to enable the 1.8V digital supply voltage.
Line 96: Line 96:
 ===== Software Initialization ===== ===== Software Initialization =====
 <WRAP centeralign>PLACEHOLDER</WRAP> <WRAP centeralign>PLACEHOLDER</WRAP>
-**//<WRAP centeralign>Figure 4: Access the ADAR2001 Plugin from ACE</WRAP>//**+**//<WRAP centeralign>Figure 4: Access the [[adi>adar2001|ADAR2001]] Plugin from ACE</WRAP>//**
  
   - Download and install [[adi>ace|ACE]] by following the instructions in the [[http://swdownloads.analog.com/ACE/ACE_User_Manual_rev3.pdf|ACE user manual]].   - Download and install [[adi>ace|ACE]] by following the instructions in the [[http://swdownloads.analog.com/ACE/ACE_User_Manual_rev3.pdf|ACE user manual]].
   - Connect the [[adi>sdp|SDP]] controller board to both the PC and the ADAR2001-EVALZ.   - Connect the [[adi>sdp|SDP]] controller board to both the PC and the ADAR2001-EVALZ.
-  - Open [[adi>ace|ACE]] and connect to the board by double-clicking on the "ADAR2001 Board" plugin in the "Attached Hardware" section of the Start page. See Figure 4.+  - Open [[adi>ace|ACE]] and connect to the board by double-clicking on the "[[adi>adar2001|ADAR2001]] Board" plugin in the "Attached Hardware" section of the Start page. See Figure 4.
  
 {{ :resources:eval:user-guides:adar2001:5_adar2001_main_gui_overview.png?direct |}} {{ :resources:eval:user-guides:adar2001:5_adar2001_main_gui_overview.png?direct |}}
-**//<WRAP centeralign>Figure 5: ADAR2001 Main GUI Overview</WRAP>//**+**//<WRAP centeralign>Figure 5: [[adi>adar2001|ADAR2001]] Main GUI Overview</WRAP>//**
  
 ===== Mutliplier Block Setup ===== ===== Mutliplier Block Setup =====
Line 119: Line 119:
  
 Follow the below steps to configure the Multiplier block for an input signal of 4.75GHz (Tx signal of 19GHz): Follow the below steps to configure the Multiplier block for an input signal of 4.75GHz (Tx signal of 19GHz):
-  - Choose bias points from the dropdowns for the RF input buffer stages and click on the amplifier itself to enable the buffer. The buffer will change from grey to blue. +  - If the recommended bias conditions aren't sufficient, choose bias points from the dropdowns for the RF input buffer stages. Click on the amplifier itself to enable the buffer. The buffer will change from grey to blue. 
-  - Choose a bias point from the dropdown for the Mid-Band multiplier/amplifier and check the “Active” box next to the multiplier/amplifier. This will enable the circuit and change the input/output switches to the middle setting. The “Ready” checkbox should automatically be checked as well. The Mid-Band amplifier will change from grey to blue.+  - If the recommended bias condition isn't sufficient, choose a bias point from the dropdown for the Mid-Band multiplier/amplifier. Check the “Active” box next to the multiplier/amplifier. This will enable the circuit and change the input/output switches to the middle setting. The “Ready” checkbox should automatically be checked as well. The Mid-Band amplifier will change from grey to blue.
   - Be sure that the box setting the bandpass filters to their low corners is **//not//** checked.   - Be sure that the box setting the bandpass filters to their low corners is **//not//** checked.
   - Check the box enabling the notch filters after the Tx Power Amplifiers.   - Check the box enabling the notch filters after the Tx Power Amplifiers.
Line 130: Line 130:
  
 Follow the below steps to configure the Transmitter block to output the 19GHz signal from the Multiplier block on Channel 3: Follow the below steps to configure the Transmitter block to output the 19GHz signal from the Multiplier block on Channel 3:
-  - Choose a bias point for the first active splitter and click on the splitter to enable it. The splitter will change from grey to blue. +  - If the recommended bias condition isn't sufficient, choose a bias point for the first active splitter. Click on the splitter to enable it. The splitter will change from grey to blue. 
-  - Choose a bias point for the second set of active splitters and click on the splitter leading to Channels 3 and 4 to enable it. The splitter will change from grey to blue.  +  - If the recommended bias condition isn't sufficient, choose a bias point for the second set of active splitters. Click on the splitter leading to Channels 3 and 4 to enable it. The splitter will change from grey to blue.  
-  - Choose a bias point for the PAs and check the “Active” box next to Channel 3. This PA will change from grey to blue and the “Ready” checkbox will be enabled as well.+  - If the recommended bias condition isn't sufficient, choose a bias point for the PAs. Check the “Active” box next to Channel 3. This PA will change from grey to blue and the “Ready” checkbox will be enabled as well.
   - Click “Apply Changes” at the top-left of the page to send the new settings to the chip.   - Click “Apply Changes” at the top-left of the page to send the new settings to the chip.
  
 ===== Sequencer Programming ===== ===== Sequencer Programming =====
-The two built-in state machines can be used to quickly change the operating state of the ADAR2001 without having to perform multiple fast SPI writes.+The two built-in state machines can be used to quickly change the operating state of the [[adi>adar2001|ADAR2001]] without having to perform multiple fast SPI writes.
  
-There are default modes already written to the control registers to facilitate easy testing of the ADAR2001’s functions, but the modes and states are fully configurable to allow for any valid conditions to be tested.+There are default modes already written to the control registers to facilitate easy testing of the [[adi>adar2001|ADAR2001]]’s functions, but the modes and states are fully configurable to allow for any valid conditions to be tested.
  
-“Modes” refer to the configuration of the ADAR2001, while “States” refer to the order in which the modes will be cycled through when using the two state machines.+“Modes” refer to the configuration of the [[adi>adar2001|ADAR2001]], while “States” refer to the order in which the modes will be cycled through when using the two state machines.
  
 To view the current Mode or State settings, first go to a sequencer programming tab at the top of the screen the two sub-blocks are labelled “Multiplier Block” and “Tx Block”. Choose a view type from the “Current View” box. The top checkbox will show the settings for the Modes. The middle checkbox will show the settings for the States. The bottom checkbox will show the settings from the current configuration. With the sequencer disabled, the “manual” settings will be shown. These are loaded from the SPI mode registers (0x45-0x48) With the sequencer enabled, the settings from the current index in the state machine will be shown. See “VIEW TYPE” in Figure 6 and Figure 8. To view the current Mode or State settings, first go to a sequencer programming tab at the top of the screen the two sub-blocks are labelled “Multiplier Block” and “Tx Block”. Choose a view type from the “Current View” box. The top checkbox will show the settings for the Modes. The middle checkbox will show the settings for the States. The bottom checkbox will show the settings from the current configuration. With the sequencer disabled, the “manual” settings will be shown. These are loaded from the SPI mode registers (0x45-0x48) With the sequencer enabled, the settings from the current index in the state machine will be shown. See “VIEW TYPE” in Figure 6 and Figure 8.
  
 +==== Multiplier/Filter Mode Settings ====
 {{ :resources:eval:user-guides:adar2001:6_multiplier_sequencer_configuration.png?direct |}} {{ :resources:eval:user-guides:adar2001:6_multiplier_sequencer_configuration.png?direct |}}
 **//<WRAP centeralign>Figure 6: Multiplier/Filter sequencer configuration page</WRAP>//** **//<WRAP centeralign>Figure 6: Multiplier/Filter sequencer configuration page</WRAP>//**
  
-==== Multiplier/Filter Mode Settings ==== 
 To change any of the pre-programmed Multiplier/Filter Sequencer modes, follow the below steps: To change any of the pre-programmed Multiplier/Filter Sequencer modes, follow the below steps:
   - Switch the view to the tab named "Multiplier Block."   - Switch the view to the tab named "Multiplier Block."
Line 186: Line 186:
  
 ==== Sequencer Control ==== ==== Sequencer Control ====
-The Multiplier/Filter and Transmitter sequencers must be enabled before they can control the configuration of the associated ADAR2001 blocks. To enable the state machines, the checkboxes in the “STATE MACHINE CONTROL” section of the main page must be checked. See Figure 5. These checkboxes are also available in the "STATE MACHINE CONTROL" sections of the individual sequencer tabs. See Figure 6 and Figure 8.+The Multiplier/Filter and Transmitter sequencers must be enabled before they can control the configuration of the associated [[adi>adar2001|ADAR2001]] blocks. To enable the state machines, the checkboxes in the “STATE MACHINE CONTROL” section of the main page must be checked. See Figure 5. These checkboxes are also available in the "STATE MACHINE CONTROL" sections of the individual sequencer tabs. See Figure 6 and Figure 8.
  
 When the state machines are enabled, the lights at the top of the control box will show in green. Also, the top-left section of each sequencer block on the main page will change to show that the state machine is controlling the block, rather than the SPI. When the state machines are enabled, the lights at the top of the control box will show in green. Also, the top-left section of each sequencer block on the main page will change to show that the state machine is controlling the block, rather than the SPI.
Line 192: Line 192:
 Once the state machines are enabled, the latching style must be selected. By default, when a pin is pulsed, the upcoming state is loaded into memory on the rising edge of the pulse and is latched out to the individual blocks as quickly as possible. This is necessary to allow direct SPI control of the blocks, but may require special consideration for timing. See the datasheet for details. If latching is enabled, the commands aren't sent out to the blocks until the falling edge of the pulse. This helps to align all the chip changes so that they happen at once.  Once the state machines are enabled, the latching style must be selected. By default, when a pin is pulsed, the upcoming state is loaded into memory on the rising edge of the pulse and is latched out to the individual blocks as quickly as possible. This is necessary to allow direct SPI control of the blocks, but may require special consideration for timing. See the datasheet for details. If latching is enabled, the commands aren't sent out to the blocks until the falling edge of the pulse. This helps to align all the chip changes so that they happen at once. 
  
-Because the latch is the last check before the data is sent to the various internal blocks, when using the ADAR2001 in “manual” or SPI mode, the latching must be disabled for both sequencers. If this isn’t done, the blocks will never receive the new instructions unless the external sequencer pins are pulsed. This would be uncommon since the sequencers are disabled in this mode of operation.+Because the latch is the last check before the data is sent to the various internal blocks, when using the [[adi>adar2001|ADAR2001]] in “manual” or SPI mode, the latching must be disabled for both sequencers. If this isn’t done, the blocks will never receive the new instructions unless the external sequencer pins are pulsed. This would be uncommon since the sequencers are disabled in this mode of operation.
  
-When the sequencers are enabled, the state machine pointers can be moved using the buttons at the bottom of the State Machine Control section. The labelled MADV, MRST, TxADV, TxRST will directly pulse the associated pin on the ADAR2001. If necessary, it’s possible to advance or reset both sequencers simultaneously by using the respectively labelled buttons.+When the sequencers are enabled, the state machine pointers can be moved using the buttons at the bottom of the State Machine Control section. The labelled MADV, MRST, TxADV, TxRST will directly pulse the associated pin on the [[adi>adar2001|ADAR2001]]. If necessary, it’s possible to advance or reset both sequencers simultaneously by using the respectively labelled buttons.
  
 When enabled, the State Machine Control section will also reflect the current State and Mode for each sequencer. When enabled, the State Machine Control section will also reflect the current State and Mode for each sequencer.
  
 ===== ADC Block ===== ===== ADC Block =====
-The ADAR2001 has an 8 bit on-chip ADC with a 5-position multiplexer at the input. The multiplexer is used to direct the desired signal to the ADC for measurement. The multiplexer connects to the output of 4 power detectors (one for each RF output channel) as well as a temperature diode. Follow the below steps to enable the ADC for reading:+The [[adi>adar2001|ADAR2001]] has an 8 bit on-chip ADC with a 5-position multiplexer at the input. The multiplexer is used to direct the desired signal to the ADC for measurement. The multiplexer connects to the output of 4 power detectors (one for each RF output channel) as well as a temperature diode. Follow the below steps to enable the ADC for reading:
   - Be sure that the chip’s power bit is enabled at the top left of the main page.   - Be sure that the chip’s power bit is enabled at the top left of the main page.
   - Turn on the ADC’s power bit by clicking it. The ADC will change color from grey to blue.   - Turn on the ADC’s power bit by clicking it. The ADC will change color from grey to blue.
Line 214: Line 214:
  
 ==== Temperature Sensor ==== ==== Temperature Sensor ====
-Once the ADC section has been enabled and configured, the on-chip temperature sensor can be used to determine the junction temperature of the ADAR2001. Follow the below steps:+Once the ADC section has been enabled and configured, the on-chip temperature sensor can be used to determine the junction temperature of the [[adi>adar2001|ADAR2001]]. Follow the below steps:
   - Click the switch to change the selected input to the temperature sensor (position 0).   - Click the switch to change the selected input to the temperature sensor (position 0).
   - Click “Apply Changes” at the top-left of the page to send the new settings to the chip.   - Click “Apply Changes” at the top-left of the page to send the new settings to the chip.
   - Click the “Measure ADC” button. A temperature reading will appear in the box below the button.   - Click the “Measure ADC” button. A temperature reading will appear in the box below the button.
  
resources/eval/user-guides/adar2001-evalz.txt · Last modified: 16 Jul 2020 17:35 by Weston Sapia

Page Tools