A low glitch 12-bit current-steering CMOS DAC for CNC systems  

作　　者：雷鑑铭 桂涵姝 胡北稳 

机构地区：[1]School of Optical and Electronic Information,Huazhong University of Science and Technology

出　　处：《Journal of Semiconductors》2013年第2期98-102,共5页半导体学报（英文版）

基　　金：Project supported by the Hubei Natural Science Foundation of China(No.2010CDB02706)

摘　　要：A 12-bit, 100-MHz CMOS current-steering D/A converter for CNC （computer number control） systems is presented. To reduce the glitch and increase the SFDR （spurious-free dynamic range）, a low crosspoint switch driver and a special dummy switch are applied. In addition, a 4-5-3 segmental structure is used to optimize the performance and layout area. After improvement, the biggest glitch energy decreased from 6.7 pVs to 1.7 pVs, the INL decreased from 2 LSB to 0.8 LSB, the SFDR is 78 dB at a 100-MSPS clock rate and 1 MHz output frequency. This DAC can deliver up to 20.8 mA full-scale current into a 50 Ω load. The power when operating at full-scale current is 163 mW. The layout area is 1.8 × 1.8 mm2 in a standard 0.35-um CMOS technology.A 12-bit, 100-MHz CMOS current-steering D/A converter for CNC （computer number control） systems is presented. To reduce the glitch and increase the SFDR （spurious-free dynamic range）, a low crosspoint switch driver and a special dummy switch are applied. In addition, a 4-5-3 segmental structure is used to optimize the performance and layout area. After improvement, the biggest glitch energy decreased from 6.7 pVs to 1.7 pVs, the INL decreased from 2 LSB to 0.8 LSB, the SFDR is 78 dB at a 100-MSPS clock rate and 1 MHz output frequency. This DAC can deliver up to 20.8 mA full-scale current into a 50 Ω load. The power when operating at full-scale current is 163 mW. The layout area is 1.8 × 1.8 mm2 in a standard 0.35-um CMOS technology.

关 键 词：CNC systems current-steering DAC low glitch CASCODE crosspoint switch driver SFDR 

分 类 号：TN792[电子电信—电路与系统]