1 Features

? Supports Defense, Aerospace, and Medical

Applications:

– Temperature range: –55°C to +150°C, TA

– Controlled Baseline

– One Assembly/Test Site

– One Fabrication Site

– Extended Product Life Cycle

– Extended Product-Change Notification

– Product Traceability

? Low input bias currents: 500 pA (typical)

(enables microamp current measurement)

? Low power:

– Low supply voltage, VS: 1.7 V to 5.5 V

– Low quiescent current: 50 μA at 25°C (typical)

? Accuracy:

– Common-mode rejection ratio: 132 dB

(minimum)

– Gain error: ±0.2 (A1 device)

– Gain drift: 7 ppm/°C (maximum)

– Offset voltage, VOS: ±15 μV (maximum)

– Offset drift: 80 nV/°C (maximum)

? Wide common-mode voltage: –0.2 V to +40 V

? Bidirectional current sensing capability

? Gain options:

– INA190A1-EP: 25 V/V

– INA190A2-EP: 50 V/V

– INA190A3-EP: 100 V/V

– INA190A4-EP: 200 V/V

– INA190A5-EP: 500 V/V

2 Applications

? Avionics

? Radar Systems

? Ruggedized Communications

? Smart Munitions

? Thermal Imaging

3 Description

The INA190-EP is a low-power, voltage-output,

current-shunt monitor (also called a currentsense

amplifier). This device is commonly

used for overcurrent protection, precision current

measurement for system optimization, or in closedloop

feedback circuits. The INA190-EP can sense

drops across shunts at common-mode voltages from

–0.2 V to +40 V, independent of the supply voltage.

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-EP 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

–55°C to +150°C, and offered in the SOT-23 package.