INA597 e-trim™ Difference Amplifiers Texas Instruments INA597 e-trim™ Difference Amplifiers are low-power, wide-bandwidth, and ideal for cost-sensitive applications. The INA597 consists of a precision operational amplifier (op amp) and a precision resistor network. Gain accuracy and common-mode rejection over temperature is maintained using tracking of the resistors. The common-mode range of the internal op amp extends to the negative supply, and enables the device to operate in single-supply applications. The device operates on single (4.5V to 36V) or dual supplies (±2.25V to ±18V).