The INA12x is laser trimmed for low-offset voltage and low offset voltage drift. Most applications require no external offset adjustment. Figure 9-2 shows an optional circuit for trimming the output offset voltage. The voltage applied to the REF pin is summed with the output. The op-amp buffer provides low impedance at the REF pin to preserve good common-mode rejection.

Figure 9-2 Optional Trimming of Output Offset Voltage