ADC

ENABL E

VS

OUT

REF

GND

IN+

IN±

LOA D

Microco ntr oller

Sup ply Vo ltag e

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

INA190

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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

SBOS863C – MARCH 2018 – REVISED APRIL 2019

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

Precision Current-Sense Amplifier With Enable

1

1 Features

1

•

Low power:

–

–

Low shutdown current: 100 nA (max)

–

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

•

Low input bias currents: 500 pA (typ)

(enables microamp current measurement)

•

Bidirectional current sensing capability

•

Accuracy:

–

Gain error: ±0.2% (A1 device)

–

Gain drift: 5-ppm/°C (max)

–

–

Offset drift: 0.13-μV/°C (max)

•

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

•

Gain options:

–

INA190A1: 25 V/V

–

INA190A2: 50 V/V

–

INA190A3: 100 V/V

–

INA190A4: 200 V/V

–

INA190A5: 500 V/V

•

Packages: 10-pin UQFN, 6-pin SC70

2 Applications

•

Notebook computers

•

Cell phones

•

Battery-powered devices

•

Telecom equipment

•

Power management

•

Battery chargers

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. Five fixed gain options are

available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500

V/V. The low input bias current of the INA190 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. The device is specified over the operating

temperature range of –40°C to +125°C, and offered

in UQFN and SC70 packages.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA190

SC70 (6)

2.00 mm x 1.25 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.

Simplified Schematic