Title :
A 10-bit 500-KS/s low power SAR ADC with splitting comparator for bio-medical applications
Author :
Pang, Wen-Yi ; Wang, Chao-Shiun ; Chang, You-Kuang ; Chou, Nai-Kuan ; Wang, Chorng-Kuang
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
This paper presents a successive approximation register analog-to-digital converter (SAR ADC) design for bio-medical applications. Splitting comparator and energy saving capacitor array are proposed to achieve low power consumption. The average switching energy of the capacitor array can be reduced by 69% compared to a conventional switching method. The measured signal-to-noise-and-distortion ratios of the ADC is 58.4 dB at 500 KS/s sampling rate with an ultra-low power consumption of 42-¿W from a 1-V supply voltage. The ADC is fabricated in a 0.18-¿m CMOS technology.
Keywords :
CMOS digital integrated circuits; analogue-digital conversion; biomedical electronics; capacitors; comparators (circuits); CMOS technology; analog-digital converter; average switching energy; biomedical applications; energy saving capacitor array; low power SAR ADC; low power consumption; power 42 muW; splitting comparator; successive approximation register ADC; voltage 1 V; CMOS technology; Capacitors; Energy consumption; Energy resolution; Fault location; Hysteresis; Power dissipation; Sampling methods; Voltage; Wireless sensor networks; Successive approximation register analog-to-digital converter (SAR ADC); bio-medical application; low power; splitting comparator;
Conference_Titel :
Solid-State Circuits Conference, 2009. A-SSCC 2009. IEEE Asian
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-4433-5
Electronic_ISBN :
978-1-4244-4434-2
DOI :
10.1109/ASSCC.2009.5357200
