OUT

IN+

IN-

Load

Supply

(0V to 36V)

+

GND

ALERT1

LATCH1

LIMIT1

+

ALERT2

LATCH2

LIMIT2

+

DELAY

INA302

+2.7V to 5.5V

10k

0.1 PF

Reference

Voltage

GPIO

GPIO

ADC

Microcontroller

GPIO

GPIO

-

( )

-

( )

+

(INA303)

COMP1

COMP2

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

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. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

INA302, INA303

SBOS775 – SEPTEMBER 2016

INA30x 36-V, Overcurrent Protection, High-Speed Precision, Current-Sense Amplifier With

Dual Integrated Comparators

1

1 Features

1

•

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

•

Amplifier and Dual Comparator Outputs:

–

INA302: Two Overlimit Alerts

–

INA303: Window Comparator

–

Threshold Levels Set Individually

–

Comparator 1 Alert Response: 1 µs

–

Comparator 2 Adjustable Delay: 3 µs to 10 s

–

Open-Drain Outputs With Independent Latch

Control Modes

•

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:

–

INA302A1, INA303A1: 20 V/V

–

INA302A2, INA303A2: 50 V/V

–

INA302A3, INA303A3: 100 V/V

2 Applications

•

Overcurrent Protection

•

Motor Controls

•

Power-Supply Protection

•

Computers and Servers

•

Telecom Equipment

3 Description

The INA302 and INA303 include a high common-

mode, bidirectional current-sensing amplifier and two

high-speed comparators. The INA302 comparators

are configured to detect and respond to overcurrent

conditions. The INA303 comparators are configured

to respond to both over- and undercurrent conditions.

The device features an adjustable limit threshold

range for each comparator set using an 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.

The open-drain alert outputs can be configured to

operate in either a transparent mode (output status

follows the input state) or in a latched mode (alert

output is cleared when the latch is reset). The alert

response time for comparator 1 is under 1 µs and the

alert response for comparator 2 is set through an

external capacitor ranging from 3 µs to 10 s.

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

supply, drawing a maximum supply current of 950 μA.

The device is specified over the extended operating

temperature

range

(–40°C

to

+125°C),

and

is

available in a 14-pin TSSOP package.

Device Information

PART NUMBER

PACKAGE

BODY SIZE

INA30x

TSSOP (14)

4.40 mm × 5.00 mm

Typical Application