VS

GND

OUT

ALERT

IN+

IN±

Load

Supply

(0 V to 36 V)

2.7 V to 5.5 V

10 k

RESET

+

INA301-Q1

0.1 F

LIMIT

GPIO

GPIO

ADC

DAC

Microcontroller

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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.

INA301-Q1

SBOS786A – APRIL 2016 – REVISED JUNE 2016

INA301-Q1 36-V, Automotive, High-Speed, Zero-Drift, Voltage-Output

Current-Shunt Monitor With High-Speed, Overcurrent Protection Comparator

1

1 Features

1

•

Qualified for Automotive Applications

•

AEC-Q100 Qualified With the Following Results:

–

Device Temperature Grade 1: –40°C to

+125°C Ambient Operating Temperature

–

Device HBM ESD Classification Level 2

–

Device CDM ESD Classification Level C6

•

Wide Common-Mode Input Range: 0 V to 36 V

•

Dual Output: Amplifier and Comparator Output

•

High Accuracy Amplifier:

–

Offset Voltage: 35 µV (Max)

–

Offset Voltage Drift: 0.5 µV/°C (Max)

–

Gain Error: 0.1% (Max)

–

Gain Error Drift: 10 ppm/°C

•

Available Amplifier Gains:

–

INA301A1-Q1: 20 V/V

–

INA301A2-Q1: 50 V/V

–

INA301A3-Q1: 100 V/V

•

Programmable Alert Threshold Set Through a

Single Resistor

•

Total Alert Response Time: 1 µs

•

Open-Drain Output With Both Transparent and

Latching Modes

•

Package: VSSOP-8

2 Applications

•

Solenoid Control

•

Low-Side Motor Monitoring

•

Electronic Power Steering

•

Power Seats

•

Power Windows

•

Body Control Modules

•

Electronic Control Units

•

Overcurrent Protection

•

eFuses

3 Description

The INA301-Q1 includes both a high common-mode,

current-sensing

amplifier

and

a

high-speed

comparator

configured

to

provide

overcurrent

protection

by

measuring

the

voltage

developed

across a current-sensing or current-shunt resistor and

comparing that voltage to a defined threshold limit.

This device features an adjustable limit-threshold

range that is set using a single external limit-setting

resistor.

This

current-shunt

monitor

measures

differential voltage signals on common-mode voltages

that can vary from 0 V up to 36 V, independent of the

supply voltage.

The open-drain alert output can be configured to

operate in either a transparent mode, where the

output status follows the input state, or in a latched

mode, where the alert output is cleared when the

latch is reset. The device alert response time is under

1 µs, allowing for quick detection of overcurrent

events.

This device operates from a single 2.7-V to 5.5-V

supply, drawing a maximum supply current of 700 µA.

The device is specified over the extended operating

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

available in an 8-pin VSSOP package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA301-Q1

VSSOP (8)

3.00 mm × 3.00 mm

(1) For all available packages, see the package option addendum

at the end of the data sheet.

Typical Application