Overview
The INA240A1QDRQ1 is an automotive-qualified, voltage-output, current-sense amplifier produced by Texas Instruments. This device is part of the INA240-Q1 family 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 INA240A1QDRQ1 operates from a single 2.7-V to 5.5-V power supply and is available in 8-pin TSSOP and SOIC packages.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.7 to 5.5 | V |
| Quiescent Current | 1.8 to 2.4 | mA |
| Operating Temperature Range (Grade 1) | –40 to +125 | °C |
| Operating Temperature Range (Grade 0) | –40 to +150 | °C |
| Common-Mode Range | –4 to 80 | V |
| Gain Error (Maximum) | 0.20% | |
| Gain Drift (Maximum) | 2.5 ppm/°C | |
| Offset Voltage (Maximum) | ±25 μV | |
| Offset Drift (Maximum) | 250 nV/°C | |
| Available Gain (INA240A1QDRQ1) | 20 V/V | |
| Bandwidth (–3-dB) | 400 kHz | |
| Slew Rate | 2 V/μs | |
| Voltage Noise Density | 40 nV/√Hz |
Key Features
- AEC-Q100 Qualified for Automotive Applications: Ensures the device meets stringent automotive standards.
- Enhanced PWM Rejection: Reduces the effect of large common-mode transients associated with PWM signals.
- Excellent CMRR: 132-dB DC CMRR and 93-dB AC CMRR at 50 kHz.
- Wide Common-Mode Range: –4 V to 80 V, allowing operation below ground for solenoid applications.
- High Accuracy: Low gain error (0.20% maximum) and offset voltage (±25 μV maximum).
- Functional Safety-Capable: Documentation available to aid in functional safety system design.
- Zero-Drift Topology: Enables precise current sensing with minimal drift.
Applications
- Electronic Power Steering
- Stability and Traction Control
- Motor and Actuator Control
- Solenoid and Valve Control
- Power Management
- Actuator Controls
- Pressure Regulators
- Telecom Equipment
Q & A
- What is the operating voltage range of the INA240A1QDRQ1?
The INA240A1QDRQ1 operates from a single 2.7-V to 5.5-V power supply.
- What is the maximum quiescent current of the INA240A1QDRQ1?
The maximum quiescent current is 2.4 mA.
- What is the common-mode range of the INA240A1QDRQ1?
The common-mode range is from –4 V to 80 V.
- What are the available gains for the INA240-Q1 family?
The available gains are 20 V/V, 50 V/V, 100 V/V, and 200 V/V.
- What is the bandwidth of the INA240A1QDRQ1?
The bandwidth is 400 kHz (–3-dB).
- What is the slew rate of the INA240A1QDRQ1?
The slew rate is 2 V/μs.
- Is the INA240A1QDRQ1 qualified for automotive applications?
Yes, it is AEC-Q100 qualified for automotive applications.
- What is the temperature range for the INA240A1QDRQ1 (Grade 1)?
The operating temperature range for Grade 1 is –40°C to +125°C.
- What is the significance of enhanced PWM rejection in the INA240A1QDRQ1?
Enhanced PWM rejection reduces the effect of large common-mode transients associated with PWM signals, ensuring accurate current measurements.
- In what packages is the INA240A1QDRQ1 available?
The device is available in 8-pin TSSOP and SOIC packages.
