Electronic compass

It has 3 channel analog signal input (input voltage about 50 mV).
Digital conversion with 13 bit ADC converter, offset correction and gain correction are performed,
then I / F with I 2 C to the microcomputer.
It’s physically small and perfect SOC with 0.25um process, which is equipped with ADC, DAC,
band gap reference voltage source, 2 series regulators, and OTP-ROM.