The INA114 is laser trimmed for very low offset voltage and drift. Most applications require no external offset adjustment. Figure 6-2 shows an optional circuit for trimming the output offset voltage. The voltage applied to the Ref pin is summed at the output. Maintain low impedance at this node to maintain good common-mode rejection by buffering trim voltage with an op amp as shown.

Figure 6-2 Optional Trimming of Output Offset Voltage.