Accelerometers deliver advanced performance in a tiny package -

Accelerometers deliver advanced performance in a tiny package


Freescale Semiconductor has introduced new high-performance, low-power three-axis accelerometers in a 2×2 mm ultra-compact package. The pin-compatible Xtrinsic MMA8652FC 12-bit and MMA8653FC 10-bit accelerometers provide low noise and advanced motion accuracy for power- and space-constrained mobile devices, including smart phones, tablets, digital cameras, portable navigation solutions and health care applications.

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Freescale's Xtrinsic MMA8652FC and MMA8653FC micro-electromechanical system (MEMS) based accelerometers support a range of features such as gesture detection, image stability, tap to control, anti-theft, and tumble and freefall detection. The MMA865xFC accelerometers, combined with Freescale's sensor toolbox development tools, enable simpler, more efficient design cycles, decreasing developers' time-to-market and lowering costs. Utilizing the MMA865xFC family, system designers can easily integrate into their products standard functions like orientation detection and more advanced applications such as eCompass and location-based services.

The new accelerometers deliver advanced sensitivity of 1 mg per LSB and feature six user configurable sample rates that can be set over a wide range (from 1.5 to 800 samples per second). The accelerometers incorporate Freescale's MEMS transducer for improved space efficiency and an on-chip FIFO (first-in/first-out) memory buffer that allows for smarter system power management. When combined with the host processor, this can contribute to a consumption savings that can range up to 96 percent or higher depending on conditions of the microcontroller and output data rates chosen.

Summary of features

  • Low-profile 2 x 2 x 1 mm DFN package
  • 12- and 10- bit digital output
  • High sensitivity: 1 mg per LSB
  • Low noise: 156 micro g per root Hertz (independent of resolution)
  • Interrupt and IIC interface supply: 1.62 to 3.6 V
  • Supply voltage : 1.95 to 3.6 V
  • Output data rate: 1.5 to 800 Hz
  • Low-power mode: 6 micro amps
  • Two programmable interrupt pins for seven interrupt sources
  • Orientation (portrait/landscape) detection with hysteresis
  • MMA8652FC embedded motion detection features:
  • Freefall or motion detection
  • Pulse detection
  • Jolt detection
  • Automatic output data rate change for auto-wake/sleep
  • Self test
  • MMA8652FC embedded 32 sample FIFO buffer
  • High pass filtered data available per sample and through the FIFO

The Xtrinsic MMA8652FC 12-bit accelerometer and MMA8653FC 10-bit accelerometer are now available in sample quantities. Production quantities are planned for Q4 2012 from Freescale and its distribution partners at a suggested resale price of $0.77 (USD) for the MMA8652FC accelerometer and $0.66 (USD) for the MMA8653FC accelerometer in 10,000-piece quantities.

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