Title :
A 12-bit fully differential SAR ADC with dynamic latch comparator for portable physiological monitoring applications
Author :
Yu, Li ; Zhang, Jingyong ; Wang, Lei ; Lu, Jianguo
Author_Institution :
Inst. of Biomed. Eng. & Health Technol., Shenzhen Inst. of Adv. Technol., Shenzhen, China
Abstract :
A 12-bit low-power successive approximation register analog-to-digital converter (SAR ADC) is presented using dynamic latch comparator to realize power consumption of 47.86μW under 1.8V supply voltage. Fully differential structure and hybrid 9-bit charge-redistribution capacitive and 3-bit resistor string DAC techniques are adopted to achieve balance between high precision and small area. Fabricated in SMIC 0.18-μm 1P6M mixed-signal CMOS technology, the ADC only occupies 0.39mm active area and the DNL/INL achieve 0.6LSB and 0.8LSB respectively.
Keywords :
CMOS integrated circuits; analogue-digital conversion; biomedical equipment; comparators (circuits); patient monitoring; 12-bit fully differential SAR ADC; 3-bit resistor string DAC techniques; 9-bit charge-redistribution capacitive DAC; dynamic latch comparator; mixed-signal CMOS technology; portable physiological monitoring; successive approximation register analog-to-digital converter; Approximation methods; Arrays; Biomedical monitoring; Capacitors; Clocks; Latches; Resistors;
Conference_Titel :
Biomedical Engineering and Informatics (BMEI), 2011 4th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-9351-7
DOI :
10.1109/BMEI.2011.6098230
