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 °C from −55 °C to 125 °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-μm technology. The die area is 0.27 mm2, and the whole system consumes less than 16 μW. Design and measurements are presented.
Low Power High-Resolution Smart Temperature Sensor for Autonomous Multi-Sensor System / DE VENUTO, Daniela; Stikvoort, E.. - In: IEEE SENSORS JOURNAL. - ISSN 1530-437X. - 12:12(2012), pp. 3384-3391. [10.1109/JSEN.2012.2198915]
Low Power High-Resolution Smart Temperature Sensor for Autonomous Multi-Sensor System
DE VENUTO, Daniela;
2012-01-01
Abstract
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 °C from −55 °C to 125 °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-μm technology. The die area is 0.27 mm2, and the whole system consumes less than 16 μW. Design and measurements are presented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
