Most applications require no external offset adjustment. However, if necessary, adjustments can be made by applying a voltage to the REF pin. Figure 8-2 shows an optional circuit for trimming the output offset voltage. The voltage applied to REF pin is summed at the output. The operational amplifier buffer provides low impedance at the REF pin to preserve good common-mode rejection.

Figure 8-2 Optional Trimming of Output Offset Voltage