Texas Instruments INA240-Q1 Handleiding

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INA240-Q1 AEC-Q100, –4-V to 80-V, Bidirectional, Ultra-Precise Current Sense

Amplifier With Enhanced PWM Rejection

1 Features

•AEC-Q100 Qualified for Automotive Applications

–Temperature Grade 1: –40°C to +125°C

Ambient Operating Temperature Range

–Temperature Grade 0: –40°C to +150°C

Ambient Operating Temperature Range

–HBM ESD Classification Level H2

–CDM ESD Classification Level C5

•Functional Safety-Capable

–Documentation available to aid functional safety

system design

•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

SPACER

+

Supply

(2.7V to 5.5V)

IN+

IN-

REF1

REF2

OUT

Typical Application

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 NUMBERPACKAGEBODY SIZE (NOM)

INA240-Q1

TSSOP (8)3.00 mm × 4.40 mm

SOIC (8)4.90 mm × 3.91 mm

(1)For all available packages, see the package option

addendum at the end of the data sheet.

Time (2 µs/div)

Common-Mode StepDDDDDDDDDDDDD

DDDDDDDDDDDDD

INA240 Output

-30-1.5

0-1

30-0.5

600

900.5

1201

1501.5

1802

2102.5

2403

2703.5

D004

270

Y1

240

210

180

150

3.50

Y1

3

2.5

2

1.5

Common-Mode Step

INA240 OUT

Enhanced PWM Rejection

INA240-Q1

SBOS808E – AUGUST 2016 – REVISED DECEMBER 2021

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.

Product specificaties