MMA7455L 데이터 시트보기 (PDF) - Freescale Semiconductor

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MMA7455L

±2g/±4g/±8g Three Axis Low-g Digital Output Accelerometer

Freescale Semiconductor 

Figure 16. SPI Connection to MCU

NOTES:

1. Use a 0.1 μF and a 10 μF capacitor on AVDD to and DVDD to decouple the power source.

2. Physical coupling distance of the accelerometer to the microcontroller should be minimal.

3. PCB layout of power and ground should not couple power supply noise.

4. Accelerometer and microcontroller should not be a high current path.

5. Any external power supply switching frequency should be selected such that they do not interfere with the internal

accelerometer sampling frequency (sampling frequency). This will prevent aliasing errors.

6. Physical distance of the two GND pins (Pin 2 and Pin 5) tied together should be at the shortest distance.

MMA7455L

20

Sensors

Freescale Semiconductor

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