Title :
A 0.9V l00nW Rail-to-Rail SAR ADC for Biomedical Applications
Author :
Roy, Tan Kuo Hwi ; Teo, T. Hui
Author_Institution :
Inst. of Microelectron., Singapore
Abstract :
This paper describes the design of a 12-bit successive approximation register (SAR) analog-to-digital converter (ADC) designed and fabricated using 0.18 mum CMOS process. The ADC operates with a supply voltage from 0.9V to 1.4 V and up to 20 kS/s sampling rate. Using charge-scaling technique and a modified dynamic comparator structure, the ADC consumes only 100 nW at Vdd = 0.9 V and 1 kS/s sampling rate. The ADC was tested and verified for phonocardiography and heart-rate counting.
Keywords :
CMOS integrated circuits; analogue-digital conversion; comparators (circuits); 0.18 mum CMOS process; analog-to-digital converter; biomedical application; charge-scaling technique; heart-rate counting; modified dynamic comparator; phonocardiography; power 100 nW; rail-to-rail SAR ADC design; size 0.18 mum; successive approximation register; voltage 0.9 V; word length 12 bit; Analog-digital conversion; CMOS process; Capacitance; Capacitors; Circuits; Energy consumption; Latches; Microelectronics; Sampling methods; Voltage;
Conference_Titel :
Integrated Circuits, 2007. ISIC '07. International Symposium on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-0797-2
Electronic_ISBN :
978-1-4244-0797-2
DOI :
10.1109/ISICIR.2007.4441903
