摘要
AD7705是AD公司推出的16位高性能、低功耗ΣΔA/D转换器,具有增益可编程放大器,可通过编程直接测量传感器输出的微弱信号。介绍了AD7705的基本特点、结构以及常用片上寄存器的格式与编程注意事项。自校准和系统校准可消除偏置和增益误差,由于现场条件变化不定,还详细介绍了适用于特定条件的现场校准与手动校准,最后给出了数据手册中没有的手动校准实例。
AD7705 is a high performance and low power 16 b Sigma -Delta A/D converter which is introduced by the AD Company. It employs a Programmable Gain Amplifier（PGA）and accepts low level signals directly from a transducer. This paper introduces its features and structure. The bit designations of the common on - chip registers are outlined as well as the considerations in programming. Self - calibration and system calibration on the AD7705 removes offset and gains errors from the device. Filed calibration and manual calibration are discussed exhaustively to deal with the uncertain conditions,and an example which can＇t be found in the datasheet is presented.
出处
《现代电子技术》
2006年第4期124-126,129,共4页
Modern Electronics Technique
