INA240A2QPWRQ1

1 Features

• 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 HBM ESD Classification Level H2

– Device CDM ESD Classification Level C5

• 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 

• Gain Error: 0.25% (Maximum) With 10 ppm/°C Maximum Drift

• Offset Voltage: ±100 μV With 0.3 μV/°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

• Quiescent Current: 2.5 mA (Maximum)

2 Applications

• Electronic Power Steering

• Stability Control

• Traction Control

• Motor and Actuator Control

• Solenoid and Valve Control

3 Description

The INA240-Q1 device is a automotive-qualified, voltage-output, current-sense amplifier family 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.

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