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

SBOS863B – MARCH 2018 – REVISED SEPTEMBER 2018

INA190 Low-Supply, High-Accuracy, Low- and High-Side Current-Shunt Monitor With

Picoamp Bias Current and Enable

1

1 Features

1

•

•

Wide Common-Mode Voltage: –0.2 V to +40 V

•

Low Shutdown Current: 100 nA (Max)

•

Low Input Bias Currents: 500 pA (Typ)

(Enables Microamp Current Measurement)

•

•

Accuracy:

–

Gain Error: ±0.2% (A1 Devices)

–

Offset Drift: 0.13-μV/°C (Max)

–

Gain Drift: 5-ppm/°C (Max)

•

Gain Options:

–

INA190A1: 25 V/V

–

INA190A2: 50 V/V

–

INA190A3: 100 V/V

–

INA190A4: 200 V/V

–

INA190A5: 500 V/V

•

Quiescent Current: 50 μA at 25°C (Typ)

•

Package: 1.8-mm x 1.4-mm UQFN-10

2 Applications

•

Notebook Computers

•

Cell Phones

•

Battery-Powered Devices

•

Telecom Equipment

•

Power Management

•

Battery Chargers

3 Description

The INA190 series of devices are voltage-output,

current-shunt monitors (also called current-sense

amplifiers). These devices are commonly used for

overcurrent

protection,

precision

current

measurement for system optimization, or in closed-

loop feedback circuits. This series of devices can

sense

drops

across

shunts

at

common-mode

voltages from –0.2 V to +40 V, independent of the

supply voltage. Five fixed gains 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.

These devices operate from a single 1.7-V to 5.5-V

power supply, and draw a maximum of 65 µA of

supply current when enabled; only 0.1 µA when

disabled. All versions are specified over the extended

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

offered in a UQFN package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA190

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