FEATURES DESCRIPTION 2 The INA149 is a precision unity-gain difference • Common-Mode Voltage Range: ±275 V amplifier with a very high input common-mode • Minimum CMRR: 90 dB from –40°C to +125°C voltage range. It is a single, monolithic device that • DC Specifications: consists of a precision op amp and an integrated thin- – Maximum Offset Voltage: 1100 μV film resistor network. The INA149 can accurately measure small differential voltages in the presence of – Maximum Offset Voltage Drift: 15 μV/°C common-mode signals up to ±275 V. The INA149 – Maximum Gain Error: 0.02% inputs are protected from momentary common-mode – Maximum Gain Error Drift: 10 ppm/°C or differential overloads of up to 500 V. – Maximum Gain Nonlinearity: 0.001% FSR In many applications, where galvanic isolation in not required, the INA149 can replace isolation amplifiers. • AC Performance: This ability can eliminate costly isolated input side – Bandwidth: 500 kHz power supplies and the associated ripple, noise, and – Typical Slew Rate: 5 V/μs quiescent current. The excellent 0.0005% nonlinearity • Wide Supply Range: ±2.0 V to ±18 V and 500-kHz bandwidth of the INA149 are superior to those of conventional isolation amplifiers. – Maximum Quiescent Current: 900 μA – Output Swing on ±15-V Supplies: ±13.5 V The INA149 is pin-compatible with the INA117 and INA148 type high common-mode voltage amplifiers • Input Protection: and offers improved performance over both devices. – Common-Mode: ±500 V The INA149 is available in the SOIC-8 package with – Differential: ±500 V operation specified over the extended industrial temperature range of –40°C to +125°C. APPLICATIONS • High-Voltage Current Sensing • Battery Cell Voltage Monitoring • Power-Supply Current Monitoring • Motor Controls • Replacement for Isolation Circuits