26V, bi-directional, high-precision current sense amplifier

The INA21x are voltage-output, current-shunt

monitors (also called current-sense amplifiers)

that are commonly used for overcurrent protection,

precision-current measurement for system

optimization, or in closed-loop feedback circuits.

This series of devices can sense drops across

shunts at common-mode voltages from –0.3 V to 26

V, independent of the supply voltage. Six fixed

gains are available: 50 V/V, 75 V/V, 100 V/V, 200

V/V, 500 V/V, or 1000 V/V. The low offset of the

zero-drift architecture enables current sensing

with maximum drops across the shunt as low as

10-mV full-scale.

These devices operate from a single 2.7-V to 26-V

power supply, drawing a maximum of 100 µA of

supply current. All versions are specified over

the extended operating temperature range (–40°C to +125°C), and

offered in SC70 and UQFN packages.