INA296x –5 V to 110 V, Bidirectional, 1.1 MHz, 8 V/μs, Ultra-Precise Current Sense

Amplifier

1 Features

• 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, INA296B1 : 10 V/V

– INA296A2, INA296B2 : 20 V/V

– INA296A3, INA296B3 : 50 V/V

– INA296A4, INA296B4 : 100 V/V

– INA296A5, INA296B5 : 200 V/V

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

VSSOP-10

2 Applications

• 48-V DC/DC Converter

• 48-V battery management systems (BMS)

• Test & Measurement

• Macro remote radio unit (RRU)

• 48-V rack server

• 48-V merchant network & server power supply

(PSU)

3 Description

The INA296x 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 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 operates from a single 2.7 V to 20 V

supply, drawing 2.5 mA of supply current. The

INA296x 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 is specified over operating temperature

range of −40°C to +125°C.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

INA296A

INA296B

DDF (SOT-23, 8)

2.90 mm × 2.80 mm

DGK (VSSOP, 8)

3.00 mm × 4.90 mm

D (SOIC, 8)

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, INA296B

SBOSA04C – MARCH 2022 – REVISED OCTOBER 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.