INA296x-Q1 AEC-Q100, –5 V to 110 V, Bidirectional, 1.1 MHz, 8 V/μs, Ultra-Precise

Current Sense Amplifier

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

• Wide common-mode voltage:

– Operational voltage: −5 V to +110 V

– Survival voltage: −20 V to +120 V

• Bidirectional operation

• High small signal bandwidth: 1.1 MHz (at all gains)

• Slew rate: 8 V/µs

• Step response settling time to 1%: 1 µs

• Excellent CMRR: 166 dB

• Accuracy:

– Gain error (maximum)

• Version A: ±0.01%, ±1 ppm/°C drift

• Version B: ±0.1%, ±5 ppm/°C drift

– Offset voltage (maximum)

• Version A: ±10 µV, ±0.1 µV/°C drift

• Version B: ±150 µV, ±0.5 µV/°C drift

• Available gains:

– INA296A1-Q1 : 10 V/V

– INA296A2-Q1 : 20 V/V

– INA296A3-Q1 : 50 V/V

– INA296A4-Q1 : 100 V/V

– INA296A5-Q1 : 200 V/V

• Package options: SOT23-8, VSSOP-8, SOIC-8,

VSSOP-10

2 Applications

• DC/DC converter

• Battery management systems (BMS)

• Fuel cell control unit

• Smart junction box

3 Description

The INA296x-Q1 is an ultra-precise, bidirectional

current sense amplifier than can measure voltage

drops across shunt resistors over a wide common-

mode range from –5 V to 110 V, independent

of the supply voltage. The high-precision current

measurement is achieved through a combination

of low offset voltage (±10 µV, maximum), small

gain error (±0.01%, maximum) and a high DC

CMRR (typical 166 dB). The INA296x-Q1 is not only

designed for high voltage, bidirectional DC current

measurements, but also for high-speed applications

(such as transient detection and fast overcurrent

protection) with a high signal bandwidth of 1.1 MHz

and fast settling time.

The INA296x-Q1 operates from a single 2.7 V to

20 V supply, drawing 2.5 mA of supply current. The

INA296x-Q1 is available in five gain options: 10 V/V,

20 V/V, 50 V/V, 100 V/V, and 200 V/V. Multiple

gain options allow for optimization between available

shunt resistor values and wide output dynamic range

requirements.

The

INA296x-Q1

is

specified

over

operating

temperature range of −40°C to +125°C.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

INA296A-Q1

INA296B-Q1

DDF (SOT-23, 8)

2.90 mm × 2.80 mm

DGK (VSSOP, 8)

3.00 mm × 4.90 mm

D (SOIC, 8)(3)

4.90 mm × 6.00 mm

DGS (VSSOP, 10)

(3)

3.00 mm × 4.90 mm

(1)

For all available packages, see the package option

addendum at the end of the data sheet.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

(3)

Package is preview only

R

SENSE

PWM

PWM

IN+

IN±

OUT

VS

REF1

REF2

GND

IN+

IN±

OUT

VS

REF1

REF2

GND

C

BYPASS

CBYPASS

48 V

12 V

Typical Application - DC/DC Converter

INA296A-Q1, INA296B-Q1

SBOSA32A – FEBRUARY 2023 – REVISED AUGUST 2023

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.