INA190-Q1 AEC-Q100, 40-V, Bidirectional, Ultra-Precise Current Sense Amplifier With

picoamp IB and ENABLE

1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: –40°C to +125°C, TA

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• 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 shutdown current: 100 nA (maximum)

– 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 with

survivability up to 42 V

• Bidirectional current sensing capability

• Gain options:

– INA190A1-Q1: 25 V/V

– INA190A2-Q1: 50 V/V

– INA190A3-Q1: 100 V/V

– INA190A4-Q1: 200 V/V

– INA190A5-Q1: 500 V/V

2 Applications

• Body control module (BCM)

• Telematics control unit

• Emergency call (eCall)

• Battery management system (BMS)

• Automotive head unit

3 Description

The INA190-Q1 is an automotive, low-power, voltage-

output, current-shunt monitor (also called a current-

sense amplifier). This device is commonly used

for monitoring systems directly connected to an

automotive 12-V battery. The INA190-Q1 can sense

drops across shunts at common-mode voltages from

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

In addition, the input pins have an absolute maximum

voltage of 42 V.

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-Q1 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 SC70 and SOT-23

packages.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA190-Q1

SC70 (6)

2.00 mm x 1.25 mm

SOT-23 (8)

1.60 mm × 2.90 mm

(1)

For all available packages, see the package option

addendum at the end of the datasheet.

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-Q1

CBYPASS

(1) The ENABLE pin is available

only in the DDF package.

Typical Application

INA190-Q1

SBOS871A – MAY 2019 – REVISED MARCH 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.