The INA145 is a precision, unity-gain differenceamplifier consisting of a precision op amp and on-chip precision resistor network. Two external resistorsset the gain from 1V/V to 1000V/V. The input com-mon-mode voltage range extends beyond the positiveand negative rails.On-chip precision resistors are laser-trimmed to achieveaccurate gain and high common-mode rejection. Ex-cellent TCR tracking of these resistors assures contin-ued high precision over temperature.The INA145 is available in the SO-8 surface-mountpackage specified for the extended industrial tempera-ture range, –40°C to +85°C.