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This version is outdated by a newer approved version.DiffThis version (20 Nov 2012 21:18) is a draft.
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Table of Contents

CN0272 Software User Guide

Overview

CN0272 is a high-speed photodiode signal conditioning circuit with dark current compensation. The system converts current from a high-speed silicon PIN photodiode and drives the inputs of a 20 MSPS ADC. This combination of parts offers spectral sensitivity from 400 nm to 1050 nm with 49 nA of photocurrent sensitivity, a dynamic range of 91 dB and 2 MHz of bandwidth. The signal conditioning circuitry of the system consumes only 40 mA of current from the ±5 V supplies making this configuration suitable for portable high-speed high-resolution light intensity applications such as pulse oximetry.

Other suitable applications for this circuit would be as an analog opto-isolator. It can also be adapted to applications that require larger bandwidth and less resolution such as adaptive speed control systems.

This user guide will discuss how to use the evaluation software to collect data from the EVAL-CN0272-SDPZ Daughter Board

Required Equipment

  • EVAL-SDP-CB1Z Evaluation Board (SDP-B Board)
  • EVAL-CN0272-SDPZ Daughter Board (CN0272 Board)
  • EVAL-CFTL-6V-PWRZ Power Supply or equivalent +6V power supply
  • CN0272 SDP Evaluation Software
    • (supplied with provided CD in kit)
  • PC with the following Minimum Requirements
    • Windows XP Service Pack 2 (32-bit)
    • USB type A Port
    • Processor rated at 1GHz or faster
    • 512 MB RAM and 500 MB available hard disk space
  • USB type A to USB type mini-B cable
  • Light source between 400nm to 1050nm (not included in kit)

General Setup

Installing the Software

  1. Extract the file CN0272 SDP Eval Software.zip and open the file setup.exe.<html><br><br></html>

    NOTE: It is recommended that you install the CN0272 SDP Evaluation Software to the default directory path C:\Program Files\Analog Devices\CN0272\ and all National Instruments products to C:\Program Files\National Instruments\

    <html><br><br><br><br><br></html>

  2. Click Next to view the installation review page<html><br><br></html><html><br><br></html>
  3. Click Next to start the installation<html><br><br></html><html><br><br></html>
  4. Upon completion of the installation of the CN0272 SDP Eval Software, the installer for the ADI SDP Drivers will execute.<html><br><br></html>

    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.

    <html><br><br></html><html><br><br></html>

  5. Press “Next” to set the installation location for the SDP Drivers.<html><br><br></html>

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

    <html><br><br></html>

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

Connecting the Hardware

  1. Place two batteries into the connector on the bottom of the EVAL-CN0272-SDPZ board, ensure the batteries are size triple A and are the correct polarity.
  2. Connect the EVAL-SDP-CB1Z and the EVAL-CN0272-SDPZ PCB’s using the 120 pin male and female connectors found on the respective boards.
  3. Plug the mini end of the USB cable into connector J2 of the EVAL-SDP-CB1Z. And connect the other end of the USB cable into the Laptop or PC.

Using the Evaluation Software

  1. Launch the executable found at C:\Program Files\Analog Devices\CN0272 and press the “Connect“ button.
  2. After pressing the “Connect” button, a prompt will appear informing the user if the accelerometer was properly configured. Press “Ok” and the software is ready to use. If the accelerometer is not configured properly, disconnect the entire setup and start over.
resources/eval/user-guides/circuits-from-the-lab/cn0272.1353442702.txt.gz · Last modified: 20 Nov 2012 21:18 by James Fitzgerald

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