MMA7456L(2009) Просмотр технического описания (PDF) - Freescale Semiconductor

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MMA7456L
(Rev.:2009)

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

Freescale Semiconductor 

AVDD

DVDD

R1

DVDD

R2

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.

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Freescale Semiconductor

MMA7456L

20

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