Texas Instruments DRV425/DRV425-Q1 Fluxgate Magnetic Field Sensor
Texas Instruments DRV425/DRV425-Q1 Precision Fluxgate Magnetic Field Sensor is designed for single-axis, magnetic-field sensing applications. This sensor enables electrically isolated, high-sensitivity, and precise DC- and AC-field measurements. The device provides an integrated fluxgate sensor (IFG) with an internal compensation coil to support a high-accuracy sensing range of ±2mT. It also has a measurement bandwidth of up to 47kHz. This sensor provides a low offset, offset drift, and noise of the sensor. The precise gain, low gain drift, and very low nonlinearity provided by the internal compensation coil result in unrivaled magnetic-field measurement precision. The output of the DRV425/DRV425-Q1 is an analog signal proportional to the sensed magnetic field. The DRV425-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- High-precision, integrated fluxgate sensor:
- Offset: ±8µT (max)
- Offset Drift: ±5nT/°C (Typ)
- Gain Error: 0.04% (Typ)
- Gain Drift: ±7ppm/°C (Typ)
- Linearity: ±0.1%
- Noise: 1.5nT/√Hz (Typ)
- Sensor range:
- ±2mT (max) range and gain adjustable with external resistor
- Selectable bandwidth: 47kHz or 32kHz
- Precision reference:
- Accuracy: 2% (max), Drift: 50ppm/°C (max)
- Pin-selectable voltage: 2.5V or 1.65V
- Selectable ratiometric mode: VDD / 2
- Diagnostic features: overrange and error flags
- Supply voltage range: 3.0V to 5.5V
Applications
- Linear position sensing
- Current sensing in busbars
- Over-the-trace current sensing
- General-purpose magnetic-field sensors
Datasheets
Additional Resources
Associated Development Tools
Texas Instruments DRV425EVM Evaluation Module (EVM)
Platform allows the user to explore the features of the DRV425, a fluxgate magnetic sensor.
Texas Instruments DRV425-BUSBAR-EVM Evaluation Bus Bar Assembly
Provides a non-invasive (isolated) current measurement solution.
Functional Block Diagram
Opublikowano: 2015-12-02
| Zaktualizowano: 2023-10-27