SBOS914F October 2018 – April 2021 INA592
PRODUCTION DATA
The INA592 is production trimmed for low offset voltage and drift. Most applications require no external offset adjustment. Figure 9-2 shows an optional circuit for trimming the output offset voltage. The output is referred to the output reference terminal (pin 1), which is normally grounded. A voltage applied to the REF pin is summed with the output signal. This summing operation can be used to null offset voltage. To maintain good common-mode rejection, the source impedance of a signal applied to the REF pin must be less than 8 Ω. For low impedance at the REF pin, the trim voltage can be buffered with an op amp, such as the OPA177.