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.
