原创 AK8975C

       AK8975C是AKM公司推出的一款三轴电子罗盘IC，AK8975C中集成了多个磁传感器分别用于检测X轴、Y轴和Z轴的磁感以及用于处理信号的运算电路。该电子罗盘主要应用于便携式设备（PDA或手机）的GPS功能模块上。

AK8975C的采购信息如下：

1、Si-monolithic 3-axis geomagnetic sensor LSI

2、Measurement range：± 1200 T

3、Functions

- Time-sharing sequencer controls automatic measurement of 3-axis magnetism

- Built-in ADC for magnetometer data output

- 13-bit digital output (resolution: 0.3 T)

- Individual adjustment data, already stored before shipment at AKM, such as sensitivity of sensor

- Serial interfaces (separated from main power supply, low voltage is acceptable)

· I²C-bus interface (can be operated at Standard- or Fast-mode)

· 4-wire SPI

- Operation modes: Power-down, Single measurement and ROM access

- Magnetic sensor overflow monitor function

- Power on reset circuit

- Interrupt function for measurement data ready

- No clock input required (built-in oscillator)

- Automatic power-down function

4、Operating temperature range: -30°C to +85°C

5、Operating supply voltage range: Vdd = +2.4V to +3.6V, Vid = +1.65V to Vdd

6、Current consumption

- 3-axis magnetism measurement (ave.)： 350 A (typ.) at 8 Hz repetition rate

- Power-down：                      3 A (typ.)

7、Packages

- AK8975：     16-pin QFN          (4.0 4.0 0.75 mm)

- AK8975B/C：  14-pin WL-CSP, BGA  (2.0 2.0 0.6 mm)

AK8975C的功能框图如下：

AK8975C的管脚图如下：