Low Power High-Resolution Smart Temperature Sensor for Autonomous Multi-Sensor System

被引：8
|
作者：
De Venuto, Daniela [1 ,2 ]
Stikvoort, Eduard [3 ]
机构：
[1] Politecn Bari, Fac Engn, Dept Elect & Elect Engn, I-70126 Bari, Italy
[2] Natl Inst Nucl Phys, I-70125 Bari, Italy
[3] Philips Res, NL-5656 AE Einthoven, Netherlands
来源：
IEEE SENSORS JOURNAL | 2012年 / 12卷 / 12期
关键词：
Low power amplifier; low-power ADC; rail-to-rail buffer; SC preamplifier; temperature smart sensor;
D O I：
10.1109/JSEN.2012.2198915
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A low power temperature sensor followed by a switched capacitor amplifier, a buffer stage, and a 12-bit successive approximation analogue-to-digital converter (ADC) for autonomous multi-sensor systems is presented. The proposed design is accurate within 0.01 degrees C from -55 degrees C to 125 degrees C. A proportional to absolute temperature source was used as a temperature sensor. The read-out enables a differential reading of a reference and actual temperature. The subsequent ADC digitizes the output signal. The ADC has a figure-of-merit of 66 fJ/conversion-step at a bit-clock of 50 kHz. The system is implemented in an NXP CMOS 0.14-mu m technology. The die area is 0.27 mm(2), and the whole system consumes less than 16 mu W. Design and measurements are presented.
引用
收藏
页码：3384 / 3391
页数：8
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