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resources:eval:user-guides:circuits-from-the-lab:cn0370 [16 Sep 2015 04:33] – Ramon Glenn Amparoresources:eval:user-guides:circuits-from-the-lab:cn0370 [10 Jul 2018 20:19] – [Overview] Motoko Hunt
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 ===== Overview ===== ===== Overview =====
  
-CN0370 is a complete single supply 16-bit unbuffered voltage output DAC that maintains ±1 LSB integral and differential linearity by utilizing a CMOS DAC, which has a voltage to current conversion for precision control of current through an LED. It offers a solution for a highly linear, low noise solution for controlling current.+[[adi>CN0370]] is a complete single-supply, low noise LED current source driver controlled by a 16-bit digital-to-analog converter (DAC). The system maintains ±1 LSB integral and differential nonlinearity and has a 0.1 Hz to 10 Hz noise of less than 45 nA p-p for a full-scale output current of 20 mA.
  
-AD5542A is a single supply, 16-bit, serial input, voltage output DAC that is used to control the voltage to current conversion. ADA4500-2 is a single supply, dual low power amplifier with no zero-crossover distortion offering high linearity over the full, rail to rail common-mode input range. ADA4500-2 is used to buffer the reference voltage of the DAC and is also used in a buffer configuration to convert the voltage output of the DAC into current. ADR4525 is a high precision, low power, low noise voltage reference that is used to provide precise 2.5V reference voltage for the DAC.+[[adi>AD5542A]] is a single supply, 16-bit, serial input, voltage output DAC that is used to control the voltage to current conversion. [[adi>ADA4500-2]] is a single supply, dual low power amplifier with no zero-crossover distortion offering high linearity over the full, rail to rail common-mode input range. [[adi>ADA4500-2]] is used to buffer the reference voltage of the DAC and is also used in a buffer configuration to convert the voltage output of the DAC into current. [[adi>ADR4525]] is a high precision, low power, low noise voltage reference that is used to provide precise 2.5V reference voltage for the DAC.
  
-This user guide will discuss how to use the EVAL-SDP-CB1Z, SDP-I-PMOD and the evaluation software to be able to write and collect data from EVAL-CN070-PMDZ. The evaluation board has provisions to read the output voltage of the DAC and an option to use an external supply voltage for the LED. +This user guide will discuss how to use the [[adi>EVAL-SDP-CB1Z|EVAL-SDP-CB1Z]], [[adi>SDP-PMD-IB1Z|SDP-I-PMOD]] and the evaluation software to be able to write and collect data from [[adi>EVAL-CN0370-SDPZ|EVAL-CN070-PMDZ]]. The evaluation board has provisions to read the output voltage of the DAC and an option to use an external supply voltage for the LED. 
 {{ :resources:eval:user-guides:circuits-from-the-lab:cn0370:cn0370.jpg?direct |}} {{ :resources:eval:user-guides:circuits-from-the-lab:cn0370:cn0370.jpg?direct |}}
 ===== Required Equipment ===== ===== Required Equipment =====
  
   * PC with a USB port and Windows XP or Windows Vista   * PC with a USB port and Windows XP or Windows Vista
-32-b(it), or Windows 7 (32-bit)+    * 32-b(it), or Windows 7 (32-bit)
   * EVAL-SDP-CB1Z SDP evaluation board   * EVAL-SDP-CB1Z SDP evaluation board
   * PMD-SDP-IB1Z interposer board   * PMD-SDP-IB1Z interposer board
   * EVAL-CN0370-PMDZ circuit evaluation board   * EVAL-CN0370-PMDZ circuit evaluation board
   * CN-0370 evaluation software:   * CN-0370 evaluation software:
-ftp://ftp.analog.com/pub/cftl/CN0370/+    * ftp://ftp.analog.com/pub/cftl/CN0370/
   * Power supply: 6 V wall wart.   * Power supply: 6 V wall wart.
   * Agilent 34401A Multimeter or equivalent.   * Agilent 34401A Multimeter or equivalent.
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 ===== General Setup ===== ===== General Setup =====
  
- {{ :resources:eval:user-guides:circuits-from-the-lab:cn0370:cn0370-1.png?direct |}}+{{ :resources:eval:user-guides:circuits-from-the-lab:cn0370:cn0370-1.1.png?direct |}}
   * Connect the 120-pin connector J4 on the PMD-SDP-IB1Z interposer board to the connector marked CON A on the EVAL-SDP-CB1Z (SDP) evaluation board. Shunt on JP1 to be place on the +5.0V configuration.    * Connect the 120-pin connector J4 on the PMD-SDP-IB1Z interposer board to the connector marked CON A on the EVAL-SDP-CB1Z (SDP) evaluation board. Shunt on JP1 to be place on the +5.0V configuration. 
 {{ :resources:eval:user-guides:circuits-from-the-lab:cn0370:cn0370-2.jpg?direct |}} {{ :resources:eval:user-guides:circuits-from-the-lab:cn0370:cn0370-2.jpg?direct |}}
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 {{ :resources:eval:user-guides:circuits-from-the-lab:cn0370:cn0370-4.png?direct |}} {{ :resources:eval:user-guides:circuits-from-the-lab:cn0370:cn0370-4.png?direct |}}
   * The USB cable is used to connect EVAL-SDP-CB1Z to the PC.    * The USB cable is used to connect EVAL-SDP-CB1Z to the PC. 
-  * LED supply is shorted by a shunt to VPMOD by default.+{{ :resources:eval:user-guides:circuits-from-the-lab:cn0370:eval-cn0370-pmdz-1.jpg?direct |}} 
 +  * LED_SUPPLY is the supply for the LED. It can be taken from the PMOD supply or an external voltage supply,VEXT. It is shorted by a shunt to PMOD by default.
   * Test point VCC and AGDN are used to take voltage measurements.    * Test point VCC and AGDN are used to take voltage measurements. 
-  * JP1 on SDP-I-PMOD is shorted by a shunt on +5.0V configuration 
   * VEXT is used to supply an external voltage to the LED supply (Input range: +20max).   * VEXT is used to supply an external voltage to the LED supply (Input range: +20max).
  
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 ==== Main Tab ==== ==== Main Tab ====
 {{ :resources:eval:user-guides:circuits-from-the-lab:cn0370:sw-gui.png?direct |}} {{ :resources:eval:user-guides:circuits-from-the-lab:cn0370:sw-gui.png?direct |}}
-  *   Write data- 1 +  - Write data 
-  * *   This button is used to write the data into the DAC +     * This button is used to write the data into the DAC 
-  *   Input Mode- 2 +  - Input Mode 
-  *   External Resistor- 3 +    * This is a selector where the user can choose the input mode of changing the amount of current or changing the actual DAC code being written 
-  *   Iout- 4 +    * Input Current Mode- the amount of current desired for the LED is adjusted and by pushing the Write Data button writes the data into the board. 
-  *   R_limit- 5+    * Input Code Mode- the exact code is written on the Code box, and the amount of current output is automatically adjusted by pushing the Write Data button. 
 +  - External Resistor 
 +    * Enable the external resistor if the resistor on R_LIMIT has been changed 
 +  - Iout 
 +    * This control will enable the user to change the amount of current flowing through the LED 
 +  - R_limit 
 +    * This is the value of the resistor that limits the amount of current  through the LED, it is set to a default value of 124Ω
  
 ==== Writing data ==== ==== Writing data ====
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   - Write the exact code to be written in the Code text box.   - Write the exact code to be written in the Code text box.
   - Push the Write Data button to write the code to the board.   - Push the Write Data button to write the code to the board.
 +
 +===== Schematic, PCB Layout, Bill of Materials =====
 +
 +<WRAP round 80% download>
 +[[http://www.analog.com/media/en/reference-design-documentation/design-integration-files/CN0370-DesignSupport.zip|EVAL-CN0370-PMDZ Design & Integration Files]]
 +  * Schematics 
 +  * PCB Layout 
 +  * Bill of Materials 
 +  * Allegro Layout Files
 +</WRAP>
 +
 +//End of Document//
resources/eval/user-guides/circuits-from-the-lab/cn0370.txt · Last modified: 29 Jul 2021 07:56 by Harvey John De Chavez

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