Low power 12-bit SAR ADC for autonomous wireless sensors network interface
Low power 12-bit SAR ADC for autonomous wireless sensors network interface
复制标题
用于自主无线传感器网络接口的低功耗 12 位 SAR ADC
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
E. Stikvoort
中科院分区：
文献类型：
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作者：
D. De Venuto;D. Castro;Youri Ponomarev;E. Stikvoort
讨论了用于自主多传感器系统的功率有效和高分辨率逐次逼近ADC的设计策略。具体来说，使用制造的Si测试芯片的模拟和测量来解决和评估比较器尽可能低功耗的优化问题。所提出的设计解决方案是能够提供一个12位的分辨率在50 kHz的功耗只有0.1uW的1.2 V电源。据我们所知，所实现的品质因数为165 μ J/转化步骤，是有史以来报道的最好的。完整的ADC面积为0.35 mm 2，采用恩智浦0.14 um CMOS技术，仅需三层金属层。
Design strategies for power effective and high resolution Successive-Approximation ADCs for autonomous multi-sensor systems are discussed. Specifically, an optimisation for lowest possible power consumption of comparators is addressed and evaluated using both simulations and measurements of a fabricated Si test-chip. The proposed design solution is capable to provide a 12-bit resolution at 50-kHz with only 0.1uW power consumption on a 1.2-V supply. The achieved Figure-of-Merit is 165 ƒJ/convertion-step is, to our knowledge, the best ever reported. The complete ADC area is 0.35 mm2 in NXP 0.14um CMOS technology with only three metal layers.