Overview
The INA240A2QDRQ1 is an automotive-qualified, voltage-output, current-sense amplifier produced by Texas Instruments. This device is part of the INA240-Q1 series and is designed to sense drops across shunt resistors over a wide common-mode voltage range from –4 V to 80 V, independent of the supply voltage. It features enhanced pulse width modulation (PWM) rejection, which is crucial for accurate current measurements in systems using PWM signals, such as motor drives and solenoid control systems. The INA240A2QDRQ1 operates from a single 2.7-V to 5.5-V power supply and is available in an 8-pin SOIC package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Gain | 50 V/V | |
| Common-Mode Voltage Range | –4 V to 80 V | |
| DC Common-Mode Rejection Ratio (CMRR) | 132 dB | |
| AC CMRR at 50 kHz | 93 dB | |
| Gain Error | 0.20% (Maximum) with 2.5 ppm/°C (Maximum Drift) | |
| Offset Voltage | ±25 µV (Maximum) with 250 nV/°C (Maximum Drift) | |
| Operating Voltage Range | 2.7 V to 5.5 V | |
| Quiescent Current | 1.8 mA to 2.4 mA | |
| Operating Temperature Range | –40°C to +125°C (Grade 1), –40°C to +150°C (Grade 0) | |
| Package Type | 8-pin SOIC |
Key Features
- AEC-Q100 Qualified for Automotive Applications
- Functional Safety-Capable
- Enhanced PWM Rejection for high levels of suppression of large common-mode transients
- Excellent Common-Mode Rejection Ratio (CMRR): 132 dB DC, 93 dB AC at 50 kHz
- Wide Common-Mode Range: –4 V to 80 V
- High Accuracy: Gain Error of 0.20% (Maximum) with 2.5 ppm/°C (Maximum Drift), Offset Voltage of ±25 µV (Maximum) with 250 nV/°C (Maximum Drift)
- Zero-Drift Architecture for low offset and high precision current sensing
- Single 2.7-V to 5.5-V Power Supply
- Low Quiescent Current: 1.8 mA to 2.4 mA
Applications
- Electronic Power Steering
- Stability and Traction Control
- Motor and Actuator Control
- Solenoid and Valve Control
- Switching Power Supplies
Q & A
- What is the common-mode voltage range of the INA240A2QDRQ1? The common-mode voltage range is from –4 V to 80 V.
- What are the available gains for the INA240-Q1 series? The available gains are 20 V/V, 50 V/V, 100 V/V, and 200 V/V.
- What is the operating temperature range for the INA240A2QDRQ1? The operating temperature range is –40°C to +125°C for Grade 1 and –40°C to +150°C for Grade 0.
- What is the power supply voltage range for this device? The power supply voltage range is 2.7 V to 5.5 V.
- What is the quiescent current of the INA240A2QDRQ1? The quiescent current is 1.8 mA to 2.4 mA.
- What is the significance of enhanced PWM rejection in the INA240A2QDRQ1? Enhanced PWM rejection provides high levels of suppression for large common-mode transients associated with PWM signals, allowing for accurate current measurements without large transients and associated recovery ripple on the output voltage.
- What are the typical applications of the INA240A2QDRQ1? Typical applications include electronic power steering, stability and traction control, motor and actuator control, and solenoid and valve control.
- What is the package type of the INA240A2QDRQ1? The package type is an 8-pin SOIC.
- Is the INA240A2QDRQ1 AEC-Q100 qualified? Yes, the INA240A2QDRQ1 is AEC-Q100 qualified for automotive applications.
- What is the bandwidth of the INA240A2QDRQ1? The bandwidth is 400 kHz.
- What is the slew rate of the INA240A2QDRQ1? The slew rate is 2 V/µs.
