Melexis MLX91802TPMS: Structure and Cost Analysis

  • ID: 4316320
  • Report
  • 96 pages
  • System Plus Consulting
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The Melexis MLX91802 is an absolute pressure sensor used in industrial and automotive applications for harsh environments (-40°C to 150°C), particularly in tire pressure monitoring systems (TPMS) for cars and trucks, with a pressure range of up to 1,400 KPa. The Melexis ASIC die integrates an LF transmitter at 125 KHz to facilitate the integration of the MLX91802 in a TPMS.

It is easy to use with either the factory calibration, Melexis’ firmware, or custom firmware, and is compatible with other integrated functions like the temperature sensor and battery monitoring.

This Melexis-designed MEMS pressure sensor is based on very reliable technology, with a thick membrane and a sealed cavity. Melexis’ smart packaging approach makes it easy to integrate into a system, and it is inexpensive. The absolute pressure measurement uses a soft coating rather than complex packaging with manifolds.

This report presents a detailed analysis of sensor structure and cost, as well as a characteristics comparison between Infineon’s SP37, Freescale’s FXTH87, and Melexis’ MLX91802, highlighting the different technical choices made by each company.
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