The INA2181A4QDGSRQ1 current sense amplifier is designed for a cost-optimized solution. These devices are a family of bidirectional current-sense amplifiers (also known as current-shunt monitors) that sense voltage drops across current-sense resistors at common-mode voltages ranging from –0.2V to +26V, independent of the supply voltage. The INAx181-Q1 family integrates a matched resistor gain network with four fixed-gain device options: 20V/V, 50V/V, 100V/V, or 200V/V. This matched gain resistor network minimizes gain error and reduces temperature drift.

INA2181A4QDGSRQ1 These devices operate from a single 2.7-V to 5.5-V supply. The single-channel INA181-Q1 draws a maximum of 260 µA of supply current; the dual-channel INA2181-Q1 draws a maximum of 500 µA; and the quad-channel INA4181-Q1 draws a maximum of 900 µA.

The INA2181A4QDGSRQ1 is available in a 10-pin VSSOP package. The INA4181-Q1 is available in a 20-pin TSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C.

Product parameters:

AEC-Q100 Qualified for Automotive Applications

Temperature class 1: –40°C ≤ TA ≤ +125°C

HBM ESD Classification Level 2

CDM ESD classification level C6

Common Mode Range (VCM): –0.2V to +26V

High Bandwidth: 350kHz (A1 Devices)

Offset voltage:

±150µV (Max), V = 0V

±500µV (Max), V = 12V

Output Slew Rate: 2V/µs

Bidirectional Current Sensing Capabilities

Accuracy:

±1% gain error (maximum)

1 µV/°C Temperature Drift (Maximum)

Gain options:

20V/V (A1 device)

50V/V (A2 devices)

100V/V (A3 devices)

200V/V (A4 device)

Transient Current: 260 µA Max (INA181-Q1)