Title :
A 0.3mm2 60μW 11.2b ENOB signal acquisition ASIC for resistive bridge sensors
Author :
Pun, Alan ; Wong, Johnson ; Chan, Gordon ; Wong, Wing Kee ; Kwong, David ; Wang, K.C.
Author_Institution :
Hong Kong Appl. Sci. & Technol. Res. Inst., Hong Kong, China
Abstract :
A signal acquisition IC for 3-input resistive bridge sensors has been realized in 0.18um CMOS. It features a low noise programmable amplifier which achieved 1.8μVrms input referred noise and 120dB CMRR, a SAR ADC with 11.2 bits ENOB, an embedded temperature sensor and configurable oscillator. The active area of the chip is 0.3mm2 which consumes 60μW and 18μW at 1.8V supply with output data rate (ODR) of 400Hz and 100Hz respectively.
Keywords :
CMOS integrated circuits; analogue-digital conversion; application specific integrated circuits; intelligent sensors; low noise amplifiers; oscillators; signal detection; temperature sensors; 3-input resistive bridge sensors; CMRR; ENOB signal acquisition ASIC; ODR; SAR ADC; configurable oscillator; embedded temperature sensor; frequency 100 Hz; frequency 400 Hz; input referred noise; low noise programmable amplifier; output data rate; power 18 muW; power 60 muW; voltage 1.8 V; voltage 1.8 muV; word length 11.2 bit; Choppers (circuits); Noise; Oscillators; Sensitivity; Temperature measurement; Temperature sensors;
Conference_Titel :
Circuits and Systems (ISCAS), 2013 IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-5760-9
DOI :
10.1109/ISCAS.2013.6572142
