D3172MMA7455L Freescale Semiconductor, D3172MMA7455L Datasheet - Page 20

• Manufacturer Part Number: D3172MMA7455L
• Description: XYZ AXIS DIGITAL ACCEL
• Manufacturer: Freescale Semiconductor

Specifications of D3172MMA7455L

• Accessory Type: Accelerometer
• Acceleration: 5000 g
• Sensing Axis: Triple Axis
• Sensitivity: 70 count/g
• Output Type: Digital
• Interface Type: I2C, SPI
• Operating Voltage: 3.6 V
• Operating Current: 490 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

NOTES:
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MMA7455L
Use a 0.1 μF and a 10 μF capacitor on AV
Physical coupling distance of the accelerometer to the microcontroller should be minimal.
PCB layout of power and ground should not couple power supply noise.
Accelerometer and microcontroller should not be a high current path.
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.
Physical distance of the two GND pins (Pin 2 and Pin 5) tied together should be at the shortest distance.
Figure 16. SPI Connection to MCU
DD
to and DV
DD
to decouple the power source.
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