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AN737
Title: | Using Digital Potentiometers to Design Low Pass Adjustable Filters
Name: | AN737
Date: | 2/24/04
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

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AN737 |