一种高精度低成本10位D/A转换器的设计与实现  

Design and Implementation of a High-Precision and Low-Cost 10-Bit Digital-to-Analog Converter

作　　者：马烨[1] 李斌[1] 

机构地区：[1]华南理工大学电子与信息学院,广州510640

出　　处：《微电子学》2011年第2期189-193,共5页Microelectronics

基　　金：国家自然科学基金2010年面上项目(60976026)

摘　　要：设计了一个采用UMC 0.35μm工艺的高精度、低成本10位D/A转换器电路。该电路对电阻匹配系数要求与7位D/A转换器相同,在相同精度要求下有效减小了版图面积,降低了设计难度和生产成本。最后,在版图上采用新颖的排列方式,进一步减小了温度等因素的影响。该D/A转换器的DNL为-0.2^+0.2,INL为-0.6^+0.6。设计的电路模块已成功应用于商用驱动芯片。A high-precision and low-cost 10-bit D/A converter was designed and implemented using 0.35 μm process technology.In this circuit,requirement for matching coefficient of resistance is the same as that for a 7-bit DAC,which means that,with same process technology,layout area of the proposed circuit could be greatly reduced,hence lower cost and easier design.Finally,temperature effect on layout was further reduced by using a novel layout placement.Test results showed that the proposed D/A converter had a DNL range from-0.2 to ＋0.2 and an INL range from-0.6 to ＋0.6.The circuit has been successfully used in commercial motor chips.

关 键 词：D/A转换器 温度计码 电阻匹配 

分 类 号：TN624[电子电信—电路与系统]