Overview
The DRV425-Q1, produced by Texas Instruments, is an automotive-grade, fully integrated fluxgate magnetic sensor designed for high-precision single-axis magnetic field sensing. This device is AEC-Q100 qualified, ensuring its suitability for automotive applications with a temperature range of –40°C to +125°C. It features an integrated fluxgate sensor (IFG) with an internal compensation coil, enabling precise dc- and ac-field measurements. The DRV425-Q1 is particularly useful in applications requiring high sensitivity and accuracy, such as traction inverters, battery-management systems, and motor diagnostic systems.
Key Specifications
| Parameter | Value |
|---|---|
| Temperature Range | –40°C to +125°C |
| Sensor Range | ±2 mT (max) |
| Offset | ±8 µT (max) |
| Offset Drift | ±5 nT/°C (typ) |
| Gain Error | 0.04% (typ) |
| Gain Drift | ±7 ppm/°C (typ) |
| Linearity | ±0.1% |
| Noise | 1.5 nT/√Hz (typ) |
| Bandwidth | 47 kHz or 32 kHz (selectable) |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Package Type | WQFN (RTJ), 20 pins |
Key Features
- High-precision, integrated fluxgate sensor with internal compensation coil.
- Range and gain adjustable with external resistor.
- Selectable bandwidth: 47 kHz or 32 kHz.
- Precision reference with accuracy of 2% (max) and drift of 50 ppm/°C (max).
- Pin-selectable voltage: 2.5 V or 1.65 V.
- Selectable ratiometric mode: VDD / 2.
- Diagnostic features: Overrange and error flags.
- Internal difference amplifier and on-chip precision reference.
- Thermally-enhanced, nonmagnetic, thin WQFN package with thermal pad for optimized heat dissipation.
Applications
- High-current busbar applications, such as traction inverters or battery-management systems.
- Torque sensor or motor diagnostic systems.
- Automotive applications requiring precise magnetic field measurements.
Q & A
- What is the DRV425-Q1 used for? The DRV425-Q1 is used for high-precision single-axis magnetic field sensing in automotive and other applications requiring accurate dc- and ac-field measurements.
- What is the temperature range of the DRV425-Q1? The DRV425-Q1 operates over a temperature range of –40°C to +125°C.
- What is the sensor range of the DRV425-Q1? The sensor range is ±2 mT (max).
- Can the gain and range be adjusted on the DRV425-Q1? Yes, the gain and range can be adjusted using an external resistor.
- What are the selectable bandwidth options for the DRV425-Q1? The bandwidth can be selected between 47 kHz and 32 kHz.
- Does the DRV425-Q1 have diagnostic features? Yes, it includes overrange and error flags as diagnostic features.
- What is the supply voltage range for the DRV425-Q1? The supply voltage range is 3.0 V to 5.5 V.
- What package type is the DRV425-Q1 available in? The DRV425-Q1 is available in a thermally-enhanced, nonmagnetic, thin WQFN package with 20 pins.
- Is the DRV425-Q1 suitable for automotive applications? Yes, it is AEC-Q100 qualified for automotive applications.
- What are some common applications of the DRV425-Q1? Common applications include high-current busbar applications, torque sensors, and motor diagnostic systems.
