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Using LF receivers for tyre pressure monitoring

Posted: 04 Jul 2014  Print Version  Bookmark and Share

Keywords:FXTH87  LF  Tyre Pressure Monitoring Systems  TPMS  dequeuing 

The aim of this document is to present best practices when using the FXTH87 family of LF receivers for Tyre Pressure Monitoring Systems (TPMS) application.

Here are the recommendations to avoid losing frames around dequeuing activation threshold:
 • Use a long CW preamble in order to ensure that dequeuing function will be activated during preamble if needed and not during data frame.
 • Use dequeuing function only in application with LF input levels much higher or really lower than 100 mVpp. If used in those conditions, frames cannot be lost due to the unexpected activation of the dequeuing function.
 • Do not use dequeuing function if your application does not need more than 66 dB range, which correspond to an LF input signal maximum with 70% modulation depth around 1.2 Vpp.

View the PDF document for more information.

Originally published by Freescale Semiconductor at www.freescale.com as "Using the FXTH87 Family of LF Receivers for TPMS Application".





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