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(0 V to 36 V)

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(2.7 V to 36 V)

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Reference

Design

INA250A1, INA250A2, INA250A3, INA250A4

SBOS511B – APRIL 2015 – REVISED DECEMBER 2015

INA250 36-V, Low- or High-Side, Bidirectional, Zero-Drift

Current-Shunt Monitor with Precision Integrated Shunt Resistor

1 Features

3 Description

The INA250 is a voltage-output, current-sensing

1

•

Precision Integrated Shunt Resistor:

amplifier family that integrates an internal shunt

–

Shunt Resistor: 2 m

Ω

resistor

to

enable

high-accuracy

current

–

Shunt Resistor Tolerance: 0.1% (Max)

measurements at common-mode voltages that can

vary from 0 V to 36 V, independent of the supply

–

15 A Continuous from –40°C to 85°C

voltage. The device is a bidirectional, low- or high-

–

0°C to 125°C Temperature Coefficient:

side current-shunt monitor that allows an external

10 ppm/°C

reference to be used to measure current flowing in

•

High Accuracy:

both directions through the internal current-sensing

resistor sensor. The integration of the precision

–

Gain Error (Shunt and Amplifier): 0.3% (Max)

current-sensing

resistor

provides

calibration

–

Offset Current: 50 mA (Max, INA250A2)

equivalent

measurement

accuracy

with

ultra-low

•

Four Available Gains:

temperature

drift

performance

and

ensures

an

optimized Kelvin layout for the sensing resistor is

–

INA250A1: 200 mV/A

always obtained.

–

INA250A2: 500 mV/A

The INA250 family is available in four output voltage

–

INA250A3: 800 mV/A

scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A.

–

INA250A4: 2 V/A

This

device

is

fully

tested

and

specified

for

•

Wide Common-Mode Range: –0.1 V to 36 V

continuous currents up to 10 amps at the maximum

temperature of 125°C. The INA250 operates from a

•

Specified Operating Temperature: –40°C to 125°C

single 2.7-V to 36-V supply and draws a maximum of

300 µA of supply current. All INA250 gain versions

2 Applications

are

specified

over

the

extended

operating

•

Test Equipment

temperature

range

(–40°C

to

125°C),

and

are

available in a TSSOP-16 package.

•

Power Supplies

•

Servers

Device Information(1)

•

Telecom Equipment

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Automotive

INA250A1

•

Solar Inverters

INA250A2

TSSOP (16)

5.00 mm × 4.40 mm

•

Power Management

INA250A3

INA250A4

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simplified Schematic

1

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.