Smart tire sensor
MLX91805 Melexis
The MLX91805 is a smart tire sensor integrating an 800g XZ-axis accelerometer sensing up to 10,000 samples per second, a high-accuracy pressure sensor as well as a temperature and voltage sensors.
Top features
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800 g XZ-axis accelerometer, sensing up to 10,000 samples per second
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Tiny 4 mm x 5 mm wettable flanks DFN-14 package
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Ultra-low power operation from 3.6 V down to 1.8 V
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90 nA sleep current (LFO and timer running, memory retention)
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Power efficient 315/433 MHz RF transmission up to 150 kbps data rate
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Pressure measurement ranges: 100 - 900 kPa and 100 - 1,400 kPa
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16-bit RISC MCU with coprocessor including:
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16 KB FLASH, 512 B SRAM, 64 B NVRAM
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47 B register memory (On during sleep)
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3 GPIOs
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Ultra-low power LFO and wake-up scheduler
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Built-in diagnostics and fault detection
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- 40 to 135 °C operating temperature range
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Automotive qualified
Product description
The MLX91805 is a highly integrated System in a Package (SIP) combining an 800g XZ-axis accelerometer that senses up to 10,000 samples per second and pressure sensors with an ultra-low-power sensor interface under control of 16-bits RISC MCU in a custom, pressure ported plastic DFN14 package.
Wireless communication is ensured by an embedded 315/433 MHz RF transmitter and 125 kHz LF transceiver. Together with a few external components and a battery the MLX91805 is the most optimal solution for smart tire sensor applications.
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Features and benefits
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800 g XZ-axis accelerometer, sensing up to 10,000 samples per second
-
Tiny 4 mm x 5 mm wettable flanks DFN-14 package
-
Ultra-low power operation from 3.6 V down to 1.8 V
-
90 nA sleep current (LFO and timer running, memory retention)
-
-
Power efficient 315/433 MHz RF transmission up to 150 kbps data rate
-
Pressure measurement ranges: 100 - 900 kPa and 100 - 1,400 kPa
-
16-bit RISC MCU with coprocessor including:
-
16 KB FLASH, 512 B SRAM, 64 B NVRAM
-
47 B register memory (On during sleep)
-
3 GPIOs
-
-
Ultra-low power LFO and wake-up scheduler
-
Built-in diagnostics and fault detection
-
- 40 to 135 °C operating temperature range
-
Automotive qualified
Documents and tools
Application flyer(s)
Related tech talks
Videos
The MLX91805 smart tire sensor
The MLX91805 smart tire sensor helps OEMs prepare for the forthcoming extension of mandatory tire pressure monitoring to include commercial heavy-duty vehicles, and to enable future generations of smart tires.
