ADC

ENABLE

(1)

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 …F

RSENSE

INA190

(1) The ENABLE pin is available only

in the DDF and RSW packages.

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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.

INA190

SBOS863D – MARCH 2018 – REVISED NOVEMBER 2019

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

Precision Current-Sense Amplifier With Enable

1

1 Features

1

•

Low input bias currents: 500 pA (typ)

(enables microamp current measurement)

•

Low power:

–

Low supply voltage, VS: 1.7 V to 5.5 V

–

Low shutdown current: 100 nA (max)

–

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

•

Accuracy:

–

Common-mode rejection ratio: 132 dB (min)

–

Gain error: ±0.2% (A1 device)

–

Gain drift: 7 ppm/°C (max)

–

Offset voltage, VOS: ±15 μV (max)

–

Offset drift: 80 nV/°C (max)

•

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

•

Bidirectional current sensing capability

•

Gain options:

–

INA190A1: 25 V/V

–

INA190A2: 50 V/V

–

INA190A3: 100 V/V

–

INA190A4: 200 V/V

–

INA190A5: 500 V/V

2 Applications

•

Standard notebook PC

•

Smartphone

•

Consumer battery charger

•

Baseband unit (BBU)

•

Merchant network and server PSU

•

Battery test

3 Description

The INA190 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 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 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 UQFN,

SC70, and SOT-23 packages.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA190

SC70 (6)

2.00 mm x 1.25 mm

SOT-23 (8)

1.60 mm × 2.90 mm

UQFN (10)

1.80 mm × 1.40 mm

(1) For all available packages, see the package option addendum

at the end of the datasheet.

Typical Application