MMA7341LCR1 datasheet by Freescale Semiconductor

MMA7341LCR1 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of MMA7341LCR1?
  A good PCB layout for MMA7341LCR1 involves keeping the accelerometer's sensitive axes (X, Y, Z) perpendicular to the PCB, using a solid ground plane, and minimizing noise coupling by keeping digital and analog traces separate.
• How do I calibrate the MMA7341LCR1 accelerometer?
  Calibration involves applying known accelerations to the device and measuring the output. A simple calibration method is to rotate the device through 360° in each axis, recording the output at each 90° increment, and then calculating the sensitivity and offset for each axis.
• What is the maximum acceleration range that MMA7341LCR1 can measure?
  The MMA7341LCR1 can measure accelerations up to ±11g, but it's recommended to operate within the ±8g range for optimal performance and accuracy.
• How do I interface MMA7341LCR1 with a microcontroller?
  The MMA7341LCR1 communicates through a 3-wire SPI interface. Connect VDD to the microcontroller's power supply, GND to ground, and SCL, SDA, and CS to the microcontroller's SPI pins. Use a level shifter if the microcontroller's voltage is different from the accelerometer's.
• What is the power consumption of MMA7341LCR1?
  The MMA7341LCR1 has a typical current consumption of 400 μA at 2.5 V supply voltage, but this can vary depending on the sampling rate and operating mode. Refer to the datasheet for detailed power consumption information.