A highly energy-efficient, highly area-efficient capacitance multiplexing switching scheme for SAR ADC

作者：Liu, Jian; Ding, Ruixue^*; Liu, Shubin; Zhu, Zhangming

来源：Analog Integrated Circuits and Signal Processing, 2018, 96(1): 207-215.

DOI：10.1007/s10470-018-1217-2

• SAR ADC
• Low-power dissipation
• Area-saving
• Switching scheme
• Capacitance multiplexing

The capacitance multiplexing technology is put forward innovatively in this letter. The technology divides the traditional differential capacitance array into two parts: high bits array and low bits array. And through a simple control circuit, this method realizes low bits capacitance array multiplexing. It can improve the performance of successive approximation register (SAR) analog-to-digital converters (ADC). Based on the capacitance multiplexing technique and split-MSB mode, a highly energy-efficient and highly area-efficient capacitance multiplexing switching scheme for SAR ADC is proposed. The novel switching scheme can achieve a 86% reduction in capacitor area and 99.37% switching energy reduction compared with the conventional switching scheme for SAR ADC, respectively.

• 出版日期2018-7
• 单位西安电子科技大学