AEC-Q100, 40V, bi-directional, ultra-precise current sense amplifier w/picoamp IB & ENABLE

The INA190-Q1 is an automotive, low-power, voltage-output,

current-shunt monitor (also called a current-sense amplifier).

This device is commonly used for monitoring

systems directly connected to an automotive 12-V battery. The INA190-Q1 can sense drops across shunts at common-mode voltages from

–0.2 V to +40 V, independent of the supply voltage. In addition, the input pins have an absolute

maximum voltage of 42 V.

The low input bias current of the

device permits the use of larger current-sense resistors, thus providing accurate

current measurements in the microamp range. The low offset voltage of the zero-drift

architecture extends the dynamic range of the current measurement. This feature

allows for smaller sense resistors with lower power loss, while still providing

accurate current measurements.

The INA190-Q1 operates

from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply

current when enabled; only

0.1 µA when disabled. Five fixed gain options are available: 25 V/V, 50

V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating

temperature range of –40°C to

+125°C, and offered in

SC70 and SOT-23 packages.