VS

GND

OUT

ALERT

IN+

IN-

Load

Supply

(0 V to 36 V)

2.7 V to 5.5 V

RPULL-UP

10 k

RLIMIT

RESET

+

INA301

CBYPASS

0.1 PF

LIMIT

GPIO

GPIO

ADC

DAC

Microcontroller

Product

Folder

Sample &

Buy

Technical

Documents

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Software

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Community

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

SBOS713A – SEPTEMBER 2015 – REVISED FEBRUARY 2016

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

Current-Shunt Monitor with High-Speed, Overcurrent Comparator

1

1 Features

1

•

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: 20 V/V

–

INA301A2: 50 V/V

–

INA301A3: 100 V/V

•

Programmable Alert Threshold Set Through a

Single Resistor

•

Total Alert Response Time: 1 µs

•

Open-Drain Output With Latching Mode

•

Package: VSSOP-8

2 Applications

•

Overcurrent Protection

•

Power-Supply Protection

•

Circuit Breakers

•

Computers and Servers

•

Telecom Equipment

•

Battery Management

3 Description

The INA301 includes both a high common-mode,

current-sensing

amplifier

and

a

high-speed

comparator

configured

to

detect

overcurrent

conditions through measuring the voltage developed

across a current-sensing or current-shunt resistor and

comparing that voltage to a defined threshold limit.

The device features an adjustable limit threshold

range that is set using a single external limit-setting

resistor. This current-shunt monitor can measure

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

(–40°C

to

+125°C),

and

is

available in an 8-pin VSSOP package.

Device Information

PART NUMBER

PACKAGE

BODY SIZE

INA301

VSSOP (8)

3.00 mm × 3.00 mm

Typical Application