MCP4562 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

MCP4562

7-Bit Single I²C™ Digital POT with Volatile Memory in SC70

Microchip Technology 

MCP4017/18/19

8.4 Wheatstone Bridge Trimming

Another common configuration to “excite” a sensor

(such as a strain gauge, pressure sensor or thermistor)

is the wheatstone bridge configuration. The

wheatstone bridge provides a differential output

instead of a single-ended output. Figure 8-7 illustrates

a wheatstone bridge utilizing one to three digital

potentiometers. The digital potentiometers in this

example are used to trim the offset and gain of the

wheatstone bridge.

VDD

5 kΩ

MCP4017

VOUT

MCP4017

50 kΩ

MCP4017

50 kΩ

FIGURE 8-7:

Trimming.

Wheatstone Bridge

DS22147A-page 52

© 2009 Microchip Technology Inc.

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