Time(uS)

-1

0

1

2

3

4

5

6

7

8

9

-40

-5.6

-20

-4.8

0

-4

20

-3.2

40

-2.4

60

-1.6

80

-0.8

100

0

120

0.8

140

1.6

160

2.4

180

3.2

200

4

220

4.8

240

5.6

260

6.4

280

7.2

300

8

Common Mode Step

INA240 Vout

+

Supply

(2.7V to 5.5V)

IN+

IN-

REF1

REF2

OUT

Product

Folder

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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. PRODUCT PREVIEW Information. Product in design phase of

development. Subject to change or discontinuance without notice.

INA240

SBOS662 – JULY 2016

INA240 Wide Common-Mode Range, Voltage Output,

High- or Low-Side Bidirectional, Zero-Drift, Current-Shunt Monitor

1

1 Features

1

•

Enhanced PWM Rejection

•

Excellent CMRR

–

> 120-dB DC CMRR

–

93-dB AC CMRR at 50 kHz

•

Wide Common-Mode Range: –4 V to 80 V

•

Accuracy:

–

Gain:

–

Gain Error: 0.25% (max)

–

Gain Drift: 10 ppm/°C (max)

–

Offset:

–

Offset Voltage: ±100 μV

–

Offset Drift: 0.3 μV/°C (max)

•

Available Gains:

–

INA240A1: 20 V/V

–

INA240A2: 50 V/V

–

INA240A3: 100 V/V

–

INA240A4: 200 V/V

•

Quiescent Current: 2.5 mA (max)

2 Applications

•

Motor Controls

•

Solenoid and Valve Controls

•

Power Management

•

Actuator Controls

•

Pressure Regulators

•

Telecom Equipment

3 Description

The

INA240

is

a

voltage-output,

current-sense

amplifier with enhanced PWM rejection that can

sense drops across shunt resistors over a wide

common-mode voltage range from –4 V to 80 V,

independent of the supply voltage. The negative

common-mode voltage allows the device to operate

below ground, accommodating the flyback period of

typical

solenoid

applications.

Enhanced

PWM

rejection provides high levels of suppression for large

common-mode transients (dV/dt) in systems that use

pulse width modulation (PWM) signals (such as motor

drives and solenoid control systems). This feature

allows for accurate current measurements without

large transients and associated recovery ripple on the

output voltage.

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

power supply, drawing a maximum of 2.5 mA of

supply current. Four fixed gains are available: 20 V/V,

50 V/V, 100 V/V, and 200 V/V. The low offset of the

zero-drift architecture enables current sensing with

maximum drops across the shunt as low as 10-mV

full-scale. All versions are specified over the extended

operating temperature range (–40°C to +125°C), and

are offered in an 8-pin TSSOP package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA240

TSSOP (8)

3.00 mm × 4.40 mm

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

the end of the data sheet.

Typical Application

Enhanced PWM Rejection