Automotive Hall-sensor output driver for wide-range loading-conditions

Automotive Hall-sensor output driver for wide-range loading-conditions

The output driver includes a D/A converter, an output buffer, open-circuit detection circuits and bi-directional data transfer circuits. The main challenges in this development were accuracy and settling requirements in combination with the wide range of capacitive loading and leakage at high temperatures.

FEATURES

  • 12 bit resolution / 13 bit accuracy
  • Load resistor/load capacitor: >5kΩ/330pF –600nF
  • Step response time (10% to 90%): < 200μs
  • dynamic element matching techniques
  • class AB operation with current boosting
  • Ratiometric 4.5V -16V
  • Designed for EMC
  • -40 – 170 ºC
  • 0.45um CMOS