Fully integrated magnetic Hall sensor ASIC with 0.4uT/LSB sensitivity
One of our strengths is integrating sensor interfaces for a.o magnetic sensors. As an example, our engineers developed a highly-accurate and fully integrated Hall sensor magnetic ASIC. Starting, we contributed to the development of the Hall sensor itself, trading-off parameters such as area, structure and sensitivity on system level. To reduce the inherent offset, we have implemented a quad layout of 4 Hall plates with 90° current direction and current spinning. The signal conditioning chain consists of low-offset, low-noise amplifiers and V/I conversion. The ADC is a 15-bit extended counting delta-sigma with an equivalent LSB current of 1.4nA LSB.
Features:
- Quad Hall sensor integration with 90° current direction
- Current spinning
- Low-offset, low-noise instrumentation
- 15-bit extended counting delta sigma ADC
- Sensitivity of 0.4uT/LSB
- Offset < 6mT
- RMS noise of less than 0.5uTrms for a current of a few 100uA
- 0.18um CMOS technology
- Temperature range: -40°C to 85°C