An Ultra-Low Power Charge Redistribution Successive Approximation Register A/D Converter for Biomedical Applications.
An Ultra-Low Power Charge Redistribution Successive Approximation Register A/D Converter for Biomedical Applications.
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用于生物医学应用的超低功耗电荷再分配逐次逼近寄存器 A/D 转换器。
DOI：
10.1166/jolpe.2016.1452
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发表时间：
2016
影响因子：
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通讯作者：
John,Eugene
中科院分区：
文献类型：
--
作者：
Koppa,Santosh;Mohandesi,Manouchehr;John,Eugene
功耗是生物医学设备（例如起搏器）的关键设计约束之一，起搏器在其整个寿命期间由小型不可充电电池供电。在这些系统中，模数转换器（ADC）用作模拟世界和数字域之间的接口，发挥着关键作用。本文介绍了一种基于标准TSMC 0.18 μm CMOS工艺的8位电荷再分配逐次逼近寄存器（CR-SAR）模数转换器的设计，该转换器适用于心脏起搏器等低功耗、低数据速率器件。8位优化CRSAR ADC实现了低于250 nW的低功耗和1 KB/s的转换速率。与INL和DNL误差小于0.5 LSB的标准要求相比，该ADC的积分非线性（INL）和差分非线性（DNL）分别小于0.22 LSB和0.04 LSB。所设计的ADC工作在1 V电源电压下，转换输入范围为0 V至250 mV。
Power consumption is one of the key design constraints in biomedical devices such as pacemakers that are powered by small non rechargeable batteries over their entire life time. In these systems, Analog to Digital Converters (ADCs) are used as interface between analog world and digital domain and play a key role. In this paper we present the design of an 8-bit Charge Redistribution Successive Approximation Register (CR-SAR) analog to digital converter in standard TSMC 0.18 μm CMOS technology for low power and low data rate devices such as pacemakers. The 8-bit optimized CRSAR ADC achieves low power of less than 250 nW with conversion rate of 1 KB/s. This ADC achieves integral nonlinearity (INL) and differential nonlinearity (DNL) less than 0.22 least significant bit (LSB) and less than 0.04 LSB respectively as compared to the standard requirement for the INL and DNL errors to be less than 0.5 LSB. The designed ADC operates at 1 V supply voltage converting input ranging from 0 V to 250 mV.