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Automotive Product Finder Magazine | STMicroelectronics new accelerometer protects fragile fobs using less power

STMicroelectronics new accelerometer protects fragile fobs using less power

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News  /   August

The STMicroelectronics, a global semiconductor leader, has recently launched, AIS2DW12, automotive accelerometer, makes passive keyless entry (PKE) radio fobs tough enough to survive the inevitable drops and scrapes in a lifetime of use. Also featuring ultra-low power consumption, the accelerometer adds practicality to the convenience and superior theft resistance that comes with motion awareness.

Ordinary PKE radio fobs listen continuously for an unlock request coming from the vehicle when it is touched. They then send a command to unlock the vehicle. Thieves can force a fob that is out of range, it could be placed on a table in the owner’s house, to send an unlock command by relaying the request via an intermediate transmitter, and hence gain access and steal the vehicle.

The new product is enhanced with an accelerometer and fobs may ignore malicious relayed transmissions by powering down the receiver when not moving and out of range. The radio wakes only when movement is detected at close range as the owner approaches the vehicle. In addition, deactivating the receiver during idle periods helps extend battery life.

The new product passes severe industry shock testing, adding greater security without taking extra care of a fragile fob, and with longer battery life as a bonus.

The dedicated internal engine is used for efficient movement and orientation detection, the operating current of just 380nA at 1.6Hz is at least twice as good as alternative devices, further enhancing battery-energy savings. The accelometer operates from 1.8V DC and can be powered from a single lithium cell, producing a digital output with full-scale range up to 4g.

The new product is AEC-Q100 certified and compliant with automotive product part approval process (PPAP) Level-3. It is available now in a 2mm x 2mm x 1mm 12-pad land-grid array (LGA) package from $1.375 for orders of 1000 pieces.

Tags Cloud
  • Stmicroelectronics
  • Semi Conductor
  • Automotive Accelerometer
  • Passive Keyless Entry
  • EC-Q100 Certified
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