27.4 A 0.8mm3 ±0.68psi single-chip wireless pressure sensor for TPMS applications

• Main Authors: Nagaraju, Manohar B., Lingley, Andrew R., Sridharan, Suresh, Jingren Gu, Ruby, Richard, Otis, Brian P.
• Format: Conference Proceeding
• Language: English
• Subjects: Film bulk acoustic resonators; Frequency measurement; Frequency shift keying; Oscillators; Sensors; Wireless communication; Wireless sensor networks
• ISSN: 0193-6530; 2376-8606
• DOI: 10.1109/ISSCC.2015.7063135

This work presents a single-chip sub-mm 3 wireless pressure sensor suitable for tire pressure monitoring. The dynamic behavior and safety of an automobile tire is closely dependent on its inflation pressure: maintaining the manufacturer-recommended pressure is essential to prevent tire failure, provide stability, improve fuel efficiency and tire-life, and to reduce C0 2 emissions [1]. Thus, Tire-Pressure Monitoring Systems (TPMS) have become an essential component in modern vehicles, as stipulated by the National Highway Traffic Safety Administration (NHTSA) in 2006. State-of-the-art TPMS systems currently require a pressure sensor, multiple ICs, several external components, and a crystal on a PCB allowing wireless transmission of tire pressure [2] [3]. In this work, we describe a sub-mm 3 fully integrated wireless pressure sensor including a pressure transducer, interface circuitry, integrated timing reference, and a wireless transmitter integrated into a single die.