All switched-capacitor realized piezoresistive pressure sensor interface chip for automotive TPMS

IEICE Electronics Express

Sibo Huang¹  Yuhua Cheng¹  Zhu Zhu¹  Jianguang Chen¹ 

[1] Shanghai Research Institute of Microelectronics, Peking University

关键词: pressure sensor;    switched-capacitor;    CDS;    low power;    TPMS;   

DOI  :  10.1587/elex.10.20120641

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(9)Cited-By(1)An all switched-capacitor structure realized piezoresistive pressure sensor interface chip for automotive tire pressure monitoring system is presented. The propose integrated circuit consists of high resolution incremental ADC, low noise switched-capacitor amplifier, high accuracy bangdap reference and low-power relaxation oscillator and other related blocks. Proposed structure was implemented in standard 0.35µm CMOS process with an area of 6.1mm2. The experimental results show that the signal conditioning method provides high accuracy of 1% of the full scale output with a battery voltage from 3.6V to 2.1V over the full military temperature range. The charge consumption results into 25mAh in 10 years, including sleep mode and junction leakage current.

【 授权许可】

Unknown