DRV425 Fully-integrated fluxgate magnetic sensor for open-loop applications | TI.com

DRV425
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Fully-integrated fluxgate magnetic sensor for open-loop applications

Fully-integrated fluxgate magnetic sensor for open-loop applications - DRV425
Datasheet
 

Description

The 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 (Typ)
  • Sensor Range: ±2 mT (Max)
    • Range and Gain Adjustable with External Resistor
  • Selectable Bandwidth: 47 kHz or 32 kHz
  • 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
  • Supply Voltage Range: 3.0 V to 5.5 V

Parametrics

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Part number Order Features Operating temperature range (C) Vs (Min) (V) Package Group Vs (Max) (V) Package size: mm2:W x L (PKG) Rating
DRV425 Order now Magnetic Field Sensor     -40 to 125     3     QFN | 20     5.5     20QFN: 16 mm2: 4 x 4 (QFN | 20)     Catalog    
DRV401 Order now AFE for Magnetic Current Sensing     -40 to 125     4.5     SO PowerPAD | 20
VQFN | 20    
5.5     20SO PowerPAD: 133 mm2: 10.405000000000001 x 12.825 (SO PowerPAD | 20)
20VQFN: 25 mm2: 5 x 5 (VQFN | 20)    
Catalog    
DRV401-EP Samples not available AFE for Magnetic Current Sensing     -55 to 125     4.5     SO PowerPAD | 20     5.5     20SO PowerPAD: 133 mm2: 10.405000000000001 x 12.825 (SO PowerPAD | 20)     HiRel Enhanced Product    
DRV401-Q1 Order now AFE for Magnetic Current Sensing     -40 to 125     4.5     VQFN | 20     5.5     20VQFN: 25 mm2: 5 x 5 (VQFN | 20)     Automotive    
DRV411 Order now AFE for Magnetic Current Sensing     -40 to 125     2.7     HTSSOP | 20
QFN | 20    
5.5     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)
20QFN: 16 mm2: 4 x 4 (QFN | 20)    
Catalog    
DRV421 Order now Magnetic Field Sensor     -40 to 125     3     QFN | 20     5.5     20QFN: 16 mm2: 4 x 4 (QFN | 20)     Catalog