Allegro MicroSystems ACS70310 & ACS70311 Linear Hall-Effect Sensor ICs

Allegro MicroSystems ACS70310 and ACS70311 Linear Hall-Effect Sensor ICs incorporate a Hall element with BiCMOS integrated circuitry, providing a fully monolithic linear current sensor IC. These ICs are designed to be used in conjunction with a ferromagnetic core, providing highly accurate current sensing. ACS70310 and ACS70311 ICs have a high operating bandwidth ranging from DC to 240kHz, a fast 2µs response time, and are ideal for use in high-frequency automotive inverters and DC-DC converters where fast switching is required. The ACS70311 includes all the features of the ACS70310 with the addition of undervoltage protection (UVD) and low-voltage programming that eliminates the need for voltages greater than VCC during user programming. The ACS70311 is backward-compatible to the ACS70310, making it a drop-in replacement. Allegro MicroSystems ACS70310 and ACS70311 Linear Hall-Effect Sensor ICs are available in an extremely thin case of 1mm thick and operate in the -40°C to +150°C temperature range.

Features

  • Onboard supply regulator with reverse-battery protection provides high immunity to electrical overstress (EOS)
  • Customer-programmable, high-resolution offset, and sensitivity trim
  • Extremely low noise and high resolution achieved via proprietary Hall element and low-noise amplifier circuits
  • Open circuit detection on the GND pin (broken wire)
  • Patented circuits suppress IC output spiking during fast current step inputs
  • Customer-programmable output voltage clamps provide short-circuit diagnostic capabilities
  • UVD and low-voltage programming (ACS70311 only)
  • Immune to mechanical stress

Specifications

  • Factory-programmed segmented linear temperature compensation (TC) provides ultra-low thermal drift
    • Sensitivity error ±1%
    • Offset error ±5mV
  • 2µs response time
  • DC to 240kHz bandwidth range
  • 0.5mV/G and 11.5mV/G selectable sensitivity range
  • AEC-Q100 Grade 0, automotive qualified
  • 1mm case thickness
  • –40°C to +150°C ambient temperature range

Functional Block Diagram

Allegro MicroSystems ACS70310 & ACS70311 Linear Hall-Effect Sensor ICs

Allegro MicroSystems ACS70310 & ACS70311 Linear Hall-Effect Sensor ICs