MEMS accelerometer provides digital output for extra space savings

The latest-generation MEMS 3-axis accelerometer from Freescale Semiconductor maximises space saving by providing digital outputs to eliminate the need for a dedicated DAC.

The MMA7455L communicates over I²C or SPI buses, enabling direct connection to the digital system and also allowing convenient communication with multiple devices. Further integrated features include signal conditioning, a low-pass filter, temperature compensation and self-test for z-axis as well as threshold and pulse detection for quick motion recognition.

This extra integration fits in a 1mm-high LGA package with a 5mm x 3mm footprint while surviving shocks up to 10,000g and operating over a temperature range of -40°C to 85°C.

By also supporting the flexible g-select feature, the MMA7455L allows engineers to optimise sensitivity for applications requiring g-force detection in 2g, 4g or 8g ranges.

The MMA7455L can also be configured for 0g detection with factory-set 0g-offset and sensitivity saving additional external components.

A reduced-power standby mode is also implemented, ensuring maximum energy efficiency for handheld battery-powered devices.

 

FEATURES LGA-14 package Operating temperature range: -40°C to 85°C Supply voltage range: 2.4V to 3.6V 400µA current consumption 64LSB/g sensitivity

APPLICATIONS Tilt and motion sensors Image stability systems Freefall detection Anti-theft mechanisms Tap-activated user interfaces

 

Freescale Semiconductor/MMA7455L