The most prevalent TI E2E™ Community forum question concerning instrumentation amplifiers (IAs) revolves around common-mode voltage (Vcm) vs. output-voltage (Vout) plots. There are typically only a few of these plots in a data sheet based on commonly used power supply and reference voltage configurations. The issue is that the plots depend on the device’s supply voltage, gain and reference voltage. Therefore, if the final application uses power supplies, gain or a reference voltage that differ from those used to characterize the device, the plot will change.

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