A1

A2

Single-PoleFilter

Capacitor

+2.7Vto+18V

5kW

5kW

96kW

R

L

PREOUT

BUFIN

GND

OUT

IN-

IN+

V+

Load

-16Vto+80V

Supply

R

S

INA270

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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.

INA270, INA271

SBOS381E – FEBRUARY 2007 – REVISED JANUARY 2018

INA27x Voltage Output, Unidirectional Measurement Current-Shunt Monitor

1

1 Features

1

•

Wide Common-Mode Range: –16 V to +80 V

•

CMRR: 120 dB

•

Accuracy:

±0.5-mV Offset (typ)

±0.2% Gain Error (typ)

2.5 μV/°C Offset Drift (typ)

50 ppm/°C Gain Drift (max)

•

Bandwidth: Up to 130 kHz

•

Two Gain Options Available:

14 V/V (INA270)

20 V/V (INA271)

•

Quiescent Current: 700 μA (typ)

•

Power Supply: +2.7 V to +18 V

•

Provision for Filtering

2 Applications

•

Power Management

•

Automotive

•

Telecom Equipment

•

Notebook Computers

•

Battery Chargers

•

Cell Phones

•

Welding Equipment

3 Description

The INA270 and INA271 family of voltage-output,

current-sense amplifiers can sense drops across

shunt resistors at common-mode voltages from –16 V

to +80 V, independent of the supply voltage. The

INA270 and INA271 pinouts readily enable filtering.

The INA270 and INA271 are available with two gain

options: 14 V/V and 20 V/V. The 130-kHz bandwidth

simplifies use in current-control loops.

The INA270 and INA271 operate from a single +2.7-V

to +18-V supply, drawing 700 μA (typical) of supply

current. The devices are specified over the extended

operating temperature range of –40°C to +125°C and

are offered in an SOIC-8 package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA27x

SOIC (8)

4.90 mm × 3.91 mm

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

the end of the datasheet.

Simplified Schematic