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MCP40D17 Datasheet(PDF) 52 Page - Microchip Technology

Part # MCP40D17
Description  7-Bit Single I2C??(with Command Code) Digital POT with Volatile Memory in SC70
PDF  66 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP40D17 Datasheet(HTML) 52 Page - Microchip Technology

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MCP40D17/18/19
DS22152B-page 52
© 2009 Microchip Technology Inc.
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.
FIGURE 8-7:
Wheatstone Bridge
Trimming.
VDD
VOUT
5k
Ω
50 k
Ω
50 k
Ω
MCP40D17
MCP40D17
MCP40D17



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