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AN737

Title:
Using Digital Potentiometers to Design Low Pass Adjustable Filters
Name:
AN737
Date:
02/24/2004
Author:
Bonnie C. Baker
Description:
The most common filter found in a data acquisition system signal path is a low pass filter. This type of filter is usually used to reduce A/D converter aliasing errors. If there is more than one signal that is applied to the A/D converter through a multiplexer, each signal source may have its own set of filter requirements, i.e. settling time, fast transition region, etc. Consequently, a variety of filters may be required in the circuit prior to the multiplexer. Usually these filters are implemented with operational amplifiers, combined with fixed resistors and capacitors.
Keywords:
Digital Potentiometers, Low Pass Adjustable Filters, MCP41XXX, MCP42XXX
 
Application Notes & Source Code
 Last Updated
Size
 
  AN737
  03/14/2004
  277KB
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