Bridge sensor measurements often need to be made insystems operating on a single 5V power supply. An OPA1013dual op amp along with a REF200 current source, makes anexcellent bridge measurement system which features lowpower single-supply 5V operation and immunity to powersupply variations. One OPA1013 dual op amp is used as atwo-op-amp instrumentation amplifier. A second OPA1013is used with a REF200 to make two voltage references. Onevoltage reference is used to power the bridge, the other isused to offset the instrumentation amplifier.
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