Skip to Main Content
The design of a 5 V fully integrated magnetic sensor able to operate up to 270°C is presented. Fabricated in a Partially Depleted (PD) 1 μm SOI process, this monolithic sensor comprises a resistive Hall plate, an amplifier stage and an A/D converter delivering a temperature stabilized 8-bit digital readout of the magnetic field. This circuit uses analog techniques for continuous compensation of temperature. Design issues inherent to partially depleted SOI, as well as constraints due to high temperature, are discussed.