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AN692

Title:
Using a Digital Potentiometer to Optimize a Precision Single Supply Photo Detect
Name:
AN692
Date:
03/14/2004
Author:
Bonnie C. Baker
Description:
Photodiodes bridge the gap between light and electronics. Many times precision applications such as CT scanners, blood analyzers, smoke detectors, position sensors, IR pyrometers and chromatographs utilize the basic transimpedance amplifier circuit that transforms light energy into a usable electrical voltage. In these circuits, photodiodes are used to capture the light energy and transform it to a small current. This current is proportional to the level of illumination from the light source. A preamplifier then converts the current (in amperes) from the photodiode sensor into a usable voltage level.
Keywords:
Digital Potentiometer, Photodiode, Photosensing, Photovoltaic, MCP4XXX
 
Application Notes & Source Code
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  AN692
  03/14/2004
  253KB
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