MCP40D17 Microchip Technology Inc., MCP40D17 Datasheet - Page 52

• Manufacturer Part Number: MCP40D17
• Description: 7-bit Single I 2 C? With Command Code Digital Pot With Volatile Memory In Sc70
• Manufacturer: Microchip Technology Inc.

MCP40D17/18/19
8.4
Another common configuration to “excite” a sensor
(such as a strain gauge, pressure sensor or thermistor)
is
wheatstone bridge provides a differential output
instead of a single-ended output.
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:
Trimming.
DS22152B-page 52
the
MCP40D17
Wheatstone Bridge Trimming
wheatstone
50 kΩ
Wheatstone Bridge
bridge
V
V
OUT
DD
MCP40D17
5 kΩ
Figure 8-7
configuration.
50 kΩ
MCP40D17
illustrates
The
© 2009 Microchip Technology Inc.