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IC CURRENT SENSE 1 CIRCUIT 8SOIC
• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
– Device Temperature Grade 0: –40°C to
+150°C Ambient Operating Temperature
– 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
– Gain Error: 0.20% (Maximum) With 2.5 ppm/°C
– 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
• Electronic Power Steering
• Stability and Traction Control
• Motor and Actuator Control
• Solenoid and Valve Control
The INA240-Q1 device is an automotive-qualified,voltage-output, current-sense amplifier with enhancedPWM 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.
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