+

Supply

(2.7V to 5.5V)

IN+

IN-

REF1

REF2

OUT

Time (2 µs/div)

-30

-1.5

0

-1

30

-0.5

60

0

90

0.5

120

1

150

1.5

180

2

210

2.5

240

3

270

3.5

D004

270

Y1

240

210

180

150

3.50

Y1

3

2.5

2

1.5

Common-Mode Step

INA240 OUT

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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-Q1

SBOS808A – AUGUST 2016 – REVISED DECEMBER 2016

INA240-Q1 Automotive, Wide Common-Mode Range, High- and Low-Side, Bidirectional,

Zero-Drift, Current-Sense Amplifier With Enhanced PWM Rejection

1

1 Features

1

•

Qualified for Automotive Applications

•

AEC-Q100 Qualified With the Following Results:

–

Device Temperature Grade 1: –40°C to

+125°C Ambient Operating Temperature

Range

–

Device Temperature Grade 0: –40°C to

+150°C Ambient Operating Temperature

Range

–

Device HBM ESD Classification Level H2

–

Device CDM ESD Classification Level C5

•

Enhanced PWM Rejection

•

Excellent CMRR:

–

132-dB DC CMRR

–

93-dB AC CMRR at 50 kHz

•

Wide Common-Mode Range: –4 V to 80 V

•

Accuracy:

–

Gain Error: 0.20% (Maximum) With 2.5 ppm/°C

(Maximum Drift)

–

Offset Voltage: ±25 μV (Maximum) With 250

nV/°C (Maximum Drift)

•

Available Gains:

–

INA240A1-Q1: 20 V/V

–

INA240A2-Q1: 50 V/V

–

INA240A3-Q1: 100 V/V

–

INA240A4-Q1: 200 V/V

2 Applications

•

Electronic Power Steering

•

Stability and Traction Control

•

Motor and Actuator Control

•

Solenoid and Valve Control

3 Description

The INA240-Q1 device is an automotive-qualified,

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

(ΔV/Δt) 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 2.4 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. Grade 1 versions are specified over the

extended operating temperature range (–40°C to

+125°C) and are offered in an 8-pin TSSOP and 8-

pin SOIC packages. Grade 0 versions are specified

over the extended operating temperature range

(–40°C to +150°C) and are offered in an 8-pin SOIC

package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA240-Q1

TSSOP (8) - Grade

1 only

3.00 mm × 4.40 mm

SOIC (8) - Grade 0

and 1

4.00 mm × 3.91 mm

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

the end of the data sheet.

Typical Application

Enhanced PWM Rejection