V基准电压源-解决mybatis使用char类型字段查询oracle数据库时结果返回null问题

如果使用外部基准电压源，建议考虑2.5 V基准电压源ADR421。它的温度漂移为1 ppm/°C；在−40°C至+85°C范围内，基准电压变化只有312 μV，这对系统整体温度稳定性的影响可以忽略不计。如果动态范围要求较低，可以使用AD8317 (55 dB)或AD8319 (45 dB)对数检波器。进一步阅读MT-031 Tutorial, Grounding Data Converters and Solving the Mystery of “AGND” and “DGND”, Analog Devices. MT-077 Tutorial, Log Amp Basics, Analog Devices. MT-078 Tutorial, High Speed Log Amps, Analog Devices. MT-101 Tutorial, Decoupling Techniques, Analog Devices. Whitlow, Dana. Design and Operation of Automatic Gain Control Loops for Receivers in Modern Communications Systems. Chapter 8. Analog Devices Wireless Seminar. 2006.数据手册和评估板AD7887 Data Sheet AD7887 Evaluation Board AD8318 Data Sheet AD8318 Evaluation Board ADR421 Data Sheet修订历史4/10—Revision 0: Initial Version