Current-sense amplifier that can sense drops across shunts at common-mode voltages

The Texas Instruments’ INA21x-Q1 family of devices is a voltage-output, current-shunt monitor (also called a current-sense amplifier) that can sense drops across shunts at common-mode voltages from –0.3V to 26V, independent of the supply voltage. Five fixed gains are available: 50V/V, 75V/V, 100V/V, 200V/V, 500V/V, and 1000V/V. This family of devices is commonly used for overcurrent detection, voltage feedback control loops, or as a power monitor. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10mV full-scale. The devices operate from a single 2.7V to 26V power supply, drawing a maximum of 100µA of supply current. The devices are specified over the operating temperature range of –40C to 125C and are offered in a 6-pin SC70 package.