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
Additional Resources
- Application Note: Hysteresis Offset Error In Hall-Effect Current Sensors Using Soft Ferromagnetic Concentrator Cores
- Application Note: Material Selection and Geometry Considerations for High Current Sensing Magnetic Flux Concentrator Designs
- Application Note: Understanding Linearity Error for the ACS70310 Above 2000 G
- Selection Guide
- Technical Article: Common Driver Platform for 12V and 48V Systems Simplifies EV Starter Generator Designs
- FAQ
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Published: 2023-05-16
| Updated: 2023-05-22