Overview

AK8973 is a geomagnetism detection type electronic compass IC.

The small package of AK8973 integrates magnetic sensors for detecting geomagnetism in the X-axis, Y-axis,

and Z-axis, and arithmetic circuit for processing the signal from each sensor. AK8973 outputs four data in total as 8-bit digital values respectively: 3-axis magnetic sensor measured values and temperature sensor read value. By processing the magnetic sensor measured values withan external CPU, azimuth data can be obtained.

Features

3-axis electronic compass IC

Optimal built-in electronic compass for mobile phones and handy terminals

High sensitivity Hall sensors are integrated.

Functions

• Built-in 8-bit ADC

• Built-in amplifier for sensor signal amplification

• Built-in 8-bit DAC for sensor signal offset compensation

• Built-in EEPROM for storing individual adjustment values

• Built-in temperature sensor

• 8-bit digital output

• Serial interface: I2C bus interface (supporting the low-voltage specification)

• Automatic power-down function

• Interrupt function for measurement data ready

• Built-in master clock oscillator

…Operating temperatures: -30°C to +85°C

…Operating supply voltage: +2.5V to +3.6V

…Low current consumption/measurement time:

• Power-down: 0.2μA typ.

• Magnetic sensor driving: 6.8mA/12.6ms

Package: 16-pin QFN package: 4.0mm×4.0mm×0.7mm