Automotive acoustic knock sensor interface

3rd August 2018
Posted By : Anna Flockett
Automotive acoustic knock sensor interface

This TIDA-00152 reference design utilises a dual-channel, signal processing IC for detection of premature detonation in combustion (gasoline) engines. The heart of this design is the TPIC8101that serves as an interface between acoustical sensors or accelerometers and automobile engine management systems. 

Programmable features on this device include the selection of engine knock detection sensitivity, engine resonance frequency, and sampling rate control of on-board ADC and DAC in signal processing chain. These features allow the TPIC8101 to be a flexible interface that can adapt to cost and/or processing time constraints of the customer.

Features include:
  • 2 channel device (cars usually have two knock sensors)
  • Programmable features (gain, bpf center freq, input freq pre-scalar)
  • Broad uC selection (nine selectable external clock frequencies)
  • Full SoC (can be used for general analog signal processing)
  • Xtal-less solution (providing there is a clock from the MCU)
  • AEC-Q100.

To find out more click here.

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