微电子学, 2022, 52 (4): 572, 网络出版: 2023-01-18
一种四象限14位乘法型D/A转换器设计
Design of a Four-Quadrant 14-bit Multiplying D/A Converter
乘法型D/A转换器 电流模R-2R电阻网络 薄膜电阻 激光修调 multiplying D/A converter current-mode R-2R resistance network thin-film resistor laser trim
摘要
设计了一种14位乘法型D/A转换器。采用高3位温度计编码、低11位二进制编码的分段电流模R-2R电阻网络结构,规避了高分辨率二进制电流模R-2R电阻网络开关尺寸大、版图匹配难度大的缺点。基于混合信号CMOS工艺进行了流片,实测DNL在±0.5 LSB以内,INL在±0.8 LSB以内。该D/A转换器适用于工业控制、仪器仪表等领域。
Abstract
A 14-bit multiplying D/A converter was designed. A piecewise current mode R-2R resistor network structure with high 3-bit thermometer code and low 11-bit binary code was adopted to avoid the disadvantages of large switch size and difficult layout matching of high resolution binary current mode R-2R resistor network. The circuit was fabricated in a mixed signal CMOS process. The measured DNL was within ±0.5 LSB, and the INL was within ±0.8 LSB, which was suitable for the applications of industrial control and instrumentation.
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雷郎成, 罗雁心, 刘虹宏, 杜宇彬, 高炜褀, 张俊, 吴秋霞, 付东兵. 一种四象限14位乘法型D/A转换器设计[J]. 微电子学, 2022, 52(4): 572. LEI Langcheng, LUO Yanxin, LIU Honghong, DU Yubin, GAO Weiqi, ZHANG Jun, WU Qiuxia, FU Dongbing. Design of a Four-Quadrant 14-bit Multiplying D/A Converter[J]. Microelectronics, 2022, 52(4): 572.
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