DRV411 Hall-Effect Magnetic Sensor Signal Conditioning IC for Closed-Loop Applications | TI.com

DRV411
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Hall-Effect Magnetic Sensor Signal Conditioning IC for Closed-Loop Applications

 

Description

The DRV411 is designed to condition InSb Hall elements for use in closed-loop current-sensor modules. The DRV411 provides precision excitation circuitry for the Hall-element effectively eliminating the offset and offset-drift of the Hall element. This device also provides a 250-mA H-bridge for driving the sensor compensation coil as well a precision differential amplifier to generate the output signal. The 250-mA drive capability of the H-bridge roughly doubles the current measurement range compared to conventional single-ended drive methods.

The Hall sensor front-end circuit and the differential amplifier employ proprietary offset cancelling techniques. These techniques, along with a high-accuracy voltage reference, significantly improve the accuracy of the overall current-sensor module. The output voltage is pin-selectable to support a 2.5-V output for use with a 5-V power supply, as well as 1.65-V for 3.3-V sensors.

For optimum heat dissipation, the DRV411 is available in thermally enhanced 4-mm × 4-mm QFN and TSSOP-20 with PowerPAD packages. The DRV411 is specified for operation over the full extended industrial temperature range of –40°C to +125°C.

Features

  • Optimized for Symmetric Hall-Elements
    (for example, AKM HW-322, HW-302, or similar)
  • Spinning Current Hall Sensor Excitation
    • Elimination of Hall Sensor Offset and Drift
    • Elimination of 1/f Noise
  • Extended Current Measurement Range
    • H-Bridge Drive Capability: 250 mA
  • Precision Difference Amplifier:
    • Offset and Drift: 100 µV (max), 2 µV/°C (max)
    • System Bandwidth: 200 kHz
  • Precision Reference:
    • Accuracy: 0.2% (max)
    • Drift: 50 ppm/°C (max)
    • Pin-Selectable for 2.5 V, 1.65 V, and Ratiometric Mode
  • Overrange and Error Flags
  • Supply: 2.7 V to 5.5 V
  • Packages: 4-mm × 4-mm QFN and TSSOP-20 PowerPAD™
  • Temperature Range: –40°C to +125°C

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
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    
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    
DRV421 Order now Magnetic Field Sensor     -40 to 125     3     QFN | 20     5.5     20QFN: 16 mm2: 4 x 4 (QFN | 20)     Catalog    
DRV425 Order now Magnetic Field Sensor     -40 to 125     3     QFN | 20     5.5     20QFN: 16 mm2: 4 x 4 (QFN | 20)     Catalog