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Home » NEWEST Products » New by Manufacturer » Texas Instruments » DRV411 Sensor Signal Conditioning IC - TI
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Texas Instruments DRV411 Sensor Signal Conditioning IC

Texas Instruments DRV411
Sensor Signal Conditioning IC

Texas Instruments DRV411 Sensor Signal Conditioning IC 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 250mA H-bridge for driving the sensor compensation coil as well a precision differential amplifier to generate the output signal. The 250mA 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 2.5V output for use with a 5V power supply, as well as 1.65V for 3.3V sensors. For optimum heat dissipation, the DRV411 is available in thermally enhanced 4mm × 4mm QFN and TSSOP-20 with PowerPAD packages.

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: 100μV (max), 2μV/°C (max)
    • System Bandwidth: 200kHz
  • Precision Reference:
    • Accuracy: 0.2% (max)
    • Drift: 50ppm/°C (max)
    • Pin-Selectable for 2.5V, 1.65V, and Ratiometric Mode

  • Overrange and Error Flags
  • Supply: 2.7V to 5.5V
  • Packages: 4mm × 4mm QFN and TSSOP-20 PowerPAD™
  • Temperature Range: –40°C to +125°C
Applications
  • Closed-Loop Current-Sensor Modules
  • DC and AC Current Measurement
Block Diagram
Block Diagram
  • Texas Instruments | Amplifiers & Linear