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SLAU525-June 2013-Revised June 2013 Bipolar +/-10V Analog Output from a Unipolar Voltage Output DAC 1
Copyright © 2013, Texas Instruments Incorporated
Kevin Duke
TI Precision Designs: Verified Design
Bipolar +/-10V Analog Output from a Unipolar Voltage
Output DAC
TI Precision Designs Circuit Description
TI Precision Designs are analog solutions created by
TI’s analog experts. Verified Designs offer the theory,
component selection, simulation, complete PCB
schematic & layout, bill of materials, and measured
performance of useful circuits. Circuit modifications
that help to meet alternate design goals are also
discussed.
This unipolar to bipolar signal conditioning circuit uses
an op amp with negative feedback and three resistors
in a modified summing amplifier configuration to
generate high-voltage bipolar outputs from a generic
single supply unipolar digital-to-analog converter
(DAC). This design will take consideration for
generating voltage outputs commonly used in
industrial process control applications and for driving
reactive loads such as long cables also common in
industrial applications. The fundamentals of the
design can be extended to condition any unipolar
DAC to any bipolar range of operation.
Design Resources
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DAC
+
R
FB
R
G1
R
G2
V
REF
V
OUT
