INA117

INA117 www.ti.com INA117 INA117 High Common-Mode Voltage DIFFERENCE AMPLIFIER FEATURES q COMMON-MODE INPUT RANGE: ±200V (VS = ±15V) q PROTECTED INPUTS: ±500V Common-Mode ±500V Differential q UNITY GAIN: 0.02% Gain Error max q NONLINEARITY: 0.001% max q CMRR: 86dB min APPLICATIONS q CURRENT MONITOR q BATTERY CELL-VOLTAGE MONITOR q GROUND BREAKER q INPUT PROTECTION q SIGNAL ACQUISITION IN NOISY ENVIRONMENTS q FACTORY AUTOMATION DESCRIPTION The INA117 is a precision unity-gain difference amplifier with very high common-mode input voltage range. It is a single monolithic IC consisting of a precision op amp and integrated thin-film resistor network. It can accurately measure small differential voltages in the presence of common-mode signals up to ±200V. The INA117 inputs are protected from momentary common-mode or differential overloads up to ±500V. In many applications, where galvanic isolation is not essential, the INA117 can replace isolation amplifiers. This can eliminate costly isolated input-side power supplies and their associated ripple, noise and quiescent current. The INA117’s 0.001% nonlinearity and 200kHz bandwidth are superior to those of conventional isolation amplifiers. The INA117 is available in 8-pin plastic mini-DIP and SO-8 surface-mount packages, specified for the –40°C to +85°C temperature range. The metal TO-99 models are available specified for the –40°C to +85°C and –55°C to +125°C temperature range. 21.11kΩ RefB 1 380kΩ –In 2 380kΩ +In 3 V– 4 380kΩ...