DRV411 - Texas Instruments

DRV411 Sensor Signal Conditioning-IC

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 differen.

Features

1
•23 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.