设计了基于逐次逼近式架构的低功耗A/D转换器,该转换器有14/8 bit转换精度2种工作模式,其采样率分别为0~1×10^5/s和0~2×10^5/s.低功耗转换器基于0.18μm的互补金属氧化物半导体(CMOS)工艺完成版图设计,版图面积仅为0.64 mm×0.31 mm.转换器在最高性能下的积分非线性(INL)和微分非线性(DNL)最低有效位分别为0.38 LSB和0.33 LSB,电流消耗仅为2 mA.
A low-power 14/8 hit A/D converter is presented. Based on the successive approximation register (SAR) architecture, this A/D converter has two resolution modes: 14 bit and 8 bit, and its sampling rate is scalable within 0~1 × 10^5/s and 0~2× 10^5/s respectively. The low-power analog-to- digital converter (ADC) is fabricated by a 0. 18 μm complementary metal oxide semiconductor (CMOS) process. The active circuits measure 0.64 mm×0.31 mm. At the high performance point, interger nonlinear (INL) and differential nonlinear (DNL) of the ADC are 0.38 LSB (least significant bit) and 0.33 LSB respectively, and the entire ADC consumes only 2 mA current.