INA190-EP Bidirectional, Low-Power, Zero-Drift, Wide Dynamic Range, Precision

Current Sense Amp With Enable

1 Features

• Supports Defense, Aerospace, and Medical

Applications:

– 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 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 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

current-

sense

amplifier).

This

device

is

commonly

used for overcurrent protection, precision current

measurement for system optimization, or in closed-

loop 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.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA190-EP

SOT-23 (8)

1.60 mm × 2.90 mm

(1)

For all available packages, see the package option

addendum at the end of the data sheet.

ADC

ENABLE

VS

OUT

REF

GND

IN+

IN–

LOAD

Microcontroller

Supply Voltage

1.7 V to 5.5 V

Bus Voltage

–0.2 V to +40 V

0.5 nA

(typ)

0.5 nA

(typ)

0.1 μF

INA190-EP

Typical Application

INA190-EP

SBOSA74 – MAY 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.