INA290-Q1 AEC-Q100, 2.7-V to 120-V, 1.1-MHz, Ultra-Precise Current Sense Amplifier

1 Features

• AEC-Q100 qualified for automotive applications:

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Wide common-mode voltage:

– Operational voltage: 2.7 V to 120 V

– Survival voltage: −20 V to +122 V

• Excellent CMRR:

– 160-dB DC

– 85-dB AC at 50 kHz

• Accuracy

– Gain:

• Gain error: ±0.1% (maximum)

• Gain drift: ±5 ppm/°C (maximum)

– Offset:

• Offset voltage: ±12 µV (maximum)

• Offset drift: ±0.2 µV/°C (maximum)

• Available gains:

– A1 devices: 20 V/V

– A2 devices: 50 V/V

– A3 devices: 100 V/V

– A4 devices: 200 V/V

– A5 devices: 500 V/V

• High bandwidth: 1.1 MHz

• Slew rate: 2 V/µs

• Quiescent current: 370 µA

2 Applications

• Solid-state LiDAR

• Automotive HVAC compressor module

• Automotive interior heater module

• Automotive parking heater module

• Automotive Pumps

3 Description

The INA290-Q1 is an ultra-precise current sense

amplifier that can measure voltage drops across shunt

resistors over a wide common-mode range from 2.7 V

to 120 V. It is in a highly space-efficient SC-70

package with a PCB footprint of only 2.0 mm × 2.1

mm. The ultra-precise current measurement accuracy

is achieved thanks to the combination of an ultra-low

offset voltage of ±12 µV (maximum), a small gain

error of ±0.1% (maximum), and a high DC CMRR of

160 dB (typical). The INA290-Q1 is not only designed

for DC current measurement, but also for high-speed

applications (like fast overcurrent protection, for

example) with a high bandwidth of 1.1 MHz (at gain of

20 V/V) and an 85-dB AC CMRR (at 50 kHz).

The INA290-Q1 provides the capability to make ultra-

precise current measurements by sensing the voltage

drop across a shunt resistor over a wide common-

mode range from 2.7 V to 120 V. The INA290-Q1 is

available in the SC-70 package minimizing solution

size area.

Device Information

PART NUMBER

PACKAGE(1)

BODY SIZE (NOM)

INA290-Q1

SC-70 (5)

2.00 mm × 1.25 mm

(1)

For all available packages, see the package option

addendum at the end of the data sheet.

ADC

IN+

IN±

OUT

V

BUS

+

±

Buffer

Current

Feedback

V

S

GND

RL

R1

R1

Bias

Load

R

SENSE

I

SENSE

Typical Application

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INA290-Q1

SBOS995A – OCTOBER 2019 – REVISED NOVEMBER 2020

Copyright © 2020 Texas Instruments Incorporated

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INA290-Q1

SBOS995A – OCTOBER 2019 – REVISED NOVEMBER 2020

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.