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This version (21 Sep 2017 18:36) was approved by Brandon.The Previously approved version (20 Sep 2017 05:17) is available.Diff

CN0202 Evaluation Board Guide

Overview

CN0202 is a full function, flexible, programmable analog output solution that meets most requirements for programmable logic controller (PLC) and distributed control system (DCS) applications. It provides all the typical voltage and current output ranges with 16-bit resolution and no missing codes, 0.05% linearity, and less than 0.2% total output error. The circuit also contains key features for industrial applications, such as on-chip output fault detection and protection (short circuit, under voltage output, open circuit current output, and over temperature), CRC checking to prevent packet error (PEC), and flexible power-up options, making it an ideal choice for robust industrial control systems.

The AD5750 is a single-channel, low cost, precision voltage/current output driver developed to meet the requirements of industrial process control applications. The voltage output range can be programmed for the standard output ranges for PLC and DCS applications: 0 V to 5 V, 0 V to 10 V, −5 V to +5 V, and −10 V to +10 V with a 20% overrange setting provided for the standard ranges. The current output, which is provided on a separate pin, can be programmed for the ranges of 4 mA to 20 mA, 0 mA to 20 mA, −20 mA to +20 mA, 0 mA to 24 mA, and −24 mA to +24 mA. The unipolar ranges have a 2% overrange setting.

The AD5662 is a single channel, low cost, low power (0.75 mW @ 5 V), rail-to-rail voltage buffered output nanoDAC® device. It guarantees ±1 LSB DNL under a wide range of reference voltages that can vary from 0.75 V to the VDD supply so that it can operate with AD5750 from a common reference source of 4.096 V, provided by the ADR444. The ADR444 low drift (3 ppm/°C maximum for B-grade ), high initial accuracy (0.04% maximum for B-grade), and low noise (1.8 µV p-p typical, 0.1 Hz to 10 Hz) provides the reference voltage for both the AD5750 and AD5662 and guarantees ultralow noise, high accuracy, and low temperature drift for the circuit.

The EVAL-CN0202-SDPZ board connects to ADI’s System Demonstration Platform (SDP) and is powered by a triple output DC power supply of +15 V, -15 V and 6 V.


Required Equipment

  • EVAL-SDP-CB1Z Controller Board (SDP-B Board)
  • Triple Output DC Power Supply (6 V, +15 V and -15 V)
    • Agilent E3631A 0 V to 6 V/5 A; ±25 V/1 A Triple Output DC Power Supply
  • Digital Multimeter for Verification (Optional)
    • Agilent 34401A 6.5 Digital Multimeter
  • PC with the following Minimum Requirements
    • Windows 7 or higher
    • USB interface

General Setup

Block assignments


  • The EVAL-CN0202-SDPZ (CN-0202 Board) connects to the EVAL-SDP-CB1Z (SDP-B Board) via the 120-Pin connector
  • The EVAL-SDP-CB1Z (SDP-B Board) connects to the PC via the USB cable.
  • Terminal block CN1 is the +/- 15 V power supply input
  • Terminal block CN2 is the +6 V power supply input
  • Terminal block CN3 is for the voltage output measurement
    • Optionally, if JP3 and JP4 are open, the AD5750 output voltage feedback can be configured by connecting VSENSE+ and VSENSE- across a selected branch in the load circuit. VSENSE- should be within +/- 3.0 V of the GND
  • Terminal block CN4 is for the current output measurement


Power on the (EVAL-CN0202-SDPZ) through the triple output power supply and the (SDP-B Board) through the PC separately before connecting the two boards together.

Jumper settings

See the table in the image below for the jumper settings. Values in red are the default settings for the EVAL-CN0202-SDPZ.


Installing the Evaluation Software

  1. Extract the file CN0202_Evaluation_Software.zip and open the file setup.exe.

    NOTE: It is recommended that you install the CN0202 Evaluation Software to the default directory path C:\Program Files (x86)\Analog Devices\CN0202\ and all National Instruments products to C:\Program Files\National Instruments\

  2. Click Next to view the installation review page



  3. Click Next to start the installation



  4. Upon completion of the installation of the CN-0202 Evaluation Software, the installer for the ADI SDP Drivers will execute.

    NOTE: It is recommended that you close all other applications before clicking “Next”. This will make it possible to update relevant system files without having to reboot your computer.





  5. Press “Next” to set the installation location for the SDP Drivers.

    It is recommended that you install the drivers to the default directory path
    C:\Program Files\Analog Devices\SDP\Drivers





  6. Press “Next” to install the SDP Drivers and complete the installation of all software. Click “Finish” when done.


Using the Evaluation Software

Main Tab


  • System Configuration (Highlighted Red)
    • Connector
      • Selects which 120-pin connection of the SDP-B Board to use
    • SLCK
      • Sets the SPI clock frequency used by the evaluation board
  • AD5750-1 Configuration (Highlighted Green)
    • JP1 Configuration
      • Sets the SPI address of the AD5750-1 based on the position of JP1
    • Range Select
      • Sets the voltage/current output range
    • Toggle CLEAR
      • Sets the outputs to the zero/midscale voltage value or the minimum value of the selected current range
  • AD5750-1 Error Indicator (Highlighted Blue)
    • Vout Fault
      • There is a short circuit on the VOUT pin
    • Iout Fault
      • There is an open circuit on the IOUT pin
    • Over Temp
      • The AD5750-1 core temperature exceeds 150 °C
    • PEC Error
      • CRC-8 error checking detected an interface error
  • Output Setting (Highlighted Violet)
    • Write AD5660-1
      • Writes the hexadecimal value in the left field to the AD5660-1 output voltage
    • Reset AD5750-1
      • Resets the AD5750-1 to its power-on state
  • Quit
    • Exits the software application


Running the System

  1. Open the CN0202.exe application from the default installation location.
  2. Set the correct connector and SCLK settings for the board in the System Configuration section.
  3. Click the Connect Button
  4. Upon successful connection, select the desired range of output on the Range Select drop-down menu.
  5. Input a hex value equivalent of the desired output level in the Output Setting section.
  6. Click Write AD5662
  7. Click Disconnect Button if finished.

Schematic, PCB Layout, Bill of Materials

EVAL-CN0202-SDPZ Design & Integration Files

  • Schematics
  • PCB Layout
  • Bill of Materials
  • PADS project
resources/eval/user-guides/circuits-from-the-lab/cn0202.txt · Last modified: 21 Sep 2017 18:36 by Brandon