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DRV425 Fluxgate Magnetic-Field Sensor

Texas Instruments offers its DRV425 fully integrated precision fluxgate magnetic-field sensor and readout

Image of Texas Instruments' DRV425 Fluxgate Magnetic-Field SensorTexas Instruments' DRV425 is designed for single-axis magnetic-field sensing applications and enables electrically isolated, high-sensitivity, and precise DC- and AC-field measurements. The device provides the unique and proprietary, integrated fluxgate sensor (IFG) with an internal compensation coil to support a high-accuracy sensing range of ±2 mT with a measurement bandwidth of up to 47 kHz. The low offset, offset drift, and noise of the sensor, combined with 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 is an analog signal proportional to the sensed magnetic field.

The DRV425 offers a complete set of features, including an internal difference amplifier, on-chip precision reference, and diagnostic functions to minimize component count and system-level cost.

The DRV425 is available in a thermally enhanced, non-magnetic, thin WQFN package with a PowerPAD™ for optimized heat dissipation, and is specified for operation over the extended industrial temperature range of -40°C to 125°C.

Features
  • High-precision, integrated fluxgate sensor:
    • 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 (typical)
  • Selectable bandwidth: 47 kHz or 32 kHz
  • Supply voltage range: 3 V to 5.5 V
  • Sensor range: ±2 mT (max)
    • Range and gain adjustable with external resistor
  • Precision reference:
    • Accuracy: 2% (max), drift: 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
Applications
  • Linear position sensing
  • Current sensing in busbars
  • Over-the-trace current sensing
  • General-purpose magnetic-field sensors

DRV425 Fluxgate Magnetic-Field Sensor

ImageManufacturer Part NumberDescriptionTechnologyAxisAvailable QuantityView Details
SENSOR FLUXGATE ANALOG 20QFNDRV425RTJTSENSOR FLUXGATE ANALOG 20QFNFluxgateSingle1302 - ImmediateView Details

DRV425 Evaluation Module

ImageManufacturer Part NumberDescriptionPart StatusSensor TypeSensing RangeAvailable QuantityView Details
DRV425 EVALUATION MODULEDRV425EVMDRV425 EVALUATION MODULEActiveCurrent Sensor±2mT6 - Factory StockView Details
Published: 2016-01-13

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