An on-chip smart temperature sensor based on band gap and SAR ADC

Author

Li-Peng Wu ; Meng Yu ; Fu-Le Li

Author_Institution

Inst. of Microelectron., Tsinghua Univ., Beijing, China

fYear

2012

fDate

Oct. 29 2012-Nov. 1 2012

Firstpage

1

Lastpage

3

Abstract

A new on-chip temperature structure is presented in this paper. This on-chip temperature is primarily composed of band gap and asynchronous SAR ADC. Band gap provides SAR ADC with negative temperature coefficient voltage V_BE and reference voltage which is independent of temperature. The resolution of asynchronous SAR ADC is 11 bits. The temperature sensor is implemented in CSMC 0.5um CMOS process with area of 2.04mm². Measurement results show that the accuracy of the temperature sensor is about 0.26°C by using high resolution ADC and linear calibration, SAR ADC ENOB of 9.69, band gap reference voltage of 1.28V, and total current of 1.3mA.

Keywords

CMOS integrated circuits; analogue-digital conversion; energy gap; intelligent sensors; synthetic aperture radar; temperature measurement; temperature sensors; CSMC; asynchronous SAR ADC ENOB; band gap; band gap reference voltage; current 1.3 mA; on-chip smart temperature sensor; size 0.5 mum; voltage 1.28 V; word length 11 bit; Accuracy; Capacitors; Photonic band gap; System-on-a-chip; Temperature measurement; Temperature sensors; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on

Conference_Location

Xi´an

Print_ISBN

978-1-4673-2474-8

Type

conf

DOI

10.1109/ICSICT.2012.6467731

Filename

6467731