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CMOS Single-Chip Electronic Compass with Microcontroller

  • Christian Schott
  • Robert Racz
  • Samuel Huber
  • Angelo Manco
  • Markus Gloor
  • Nicolas Simonne

We present a CMOS single-chip electronic compass sensor including the complete digital signal processing for accurate heading calculation, which is the continuation of a work presented at the International Solid State Circuits Conference (ISSCC) 2007 in San Francisco/USA [1]. The device’s analog part consists of Hall based three-axis magnetic field transducer with integrated magnetic concentrator that operates as passive magnetic amplifier. The analog amplification chain features a gain of up to 20’000. A true-12-bit extended counting ADC converts the amplified magnetic field signals into the digital domain where a 16-Bit microcontroller calculates the heading information and outputs it via an SPI interface.

The compass sensor is realized in 0.35um low voltage CMOS technology plus a simple batch processing step for deposition of a metal layer. The compact die size of 2.3 mm × 2.8 mm allows for packaging into a standard 4mm × 5mm × 1mm surface mount plastic package.

The heading resolution is better than 0.5 degrees and the accuracy better than +/-2 degrees.

Keywords

Metal Layer Spinning Current Flux Line Hall Voltage Plastic Package 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science + Business Media B.V 2008

Authors and Affiliations

  • Christian Schott
  • Robert Racz
  • Samuel Huber
  • Angelo Manco
  • Markus Gloor
  • Nicolas Simonne

There are no affiliations available

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