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JSSC 2009第7期Other0.35μm

A 36 V Programmable Instrumentation Amplifier With Sub-20 22V Offset and a CMRR i

一款36V可编程增益仪表放大器,具有低于20μV的偏移和超过120dB的CMRR。
36V CMOS, 0.35μm, 3mA静态电流, 0.1%增益精度, 120dB CMRR
可编程增益放大器斩波稳定高共模抑制比高电压CMOS仪表放大器
创新点1:采用斩波稳定技术结合陷波滤波器,有效降低偏移电压至20μV以下,漂移低于0.2μV/°C,显著提升放大器精度(方法创新)。
创新点2:集成输入开关网络,支持双通道复用及系统级诊断功能,增强系统灵活性和故障检测能力(系统创新)。
创新点3:无需修调即可实现120dB以上的共模抑制比(CMRR),并在所有增益设置下保持高精度,增益精度优于0.1%(电路创新)。
创新点4:支持22级增益步进(1/8至128),并可选1或1.375倍乘因子,增益非线性度低于0.001%,漂移小于2ppm/°C,满足高精度工业应用需求(电路创新)。
Abstract
haffer, Martijn F. Snoeij , Member , IEEE, Mikhail V . Ivanov, Member , IEEE, and Dimitar T. Trifonov Abstract—A 36 V capable programmable gain instrumen- tation amplifier (PGA) is presented with sub-20 V offset, sub-0.2 V C offset drift and a common-mode rejection (CMRR) that exceeds 120 dB at all gain settings without any trimming. It is the first 36 V capable precision PGA implemented in a high-voltage CMOS process, which, in addition, incorporates several additional functions, such as the d