电子设计工程
電子設計工程
전자설계공정
ELECTRONIC DESIGN ENGINEERING
2015年
8期
97-99
,共3页
电子技术%数据采集%ADS125x%多通道%高精度
電子技術%數據採集%ADS125x%多通道%高精度
전자기술%수거채집%ADS125x%다통도%고정도
technology of electronics%data acquisition%ADS125x%multi-channel%high precision
ADS125x 是基于Δ－Σ技术的高性能多通道24位模数转换器（ADC），可实现理论上高达23位的无噪音分辨率和最高30KSPS的数据采样率。基于嵌入式处理器对ADS125X的单极性、多通道数据采集设计进行了实验，并总结出在实际使用中高采样率下提高精度的设计技巧。经有效位数测试表明，在采样率为1KSPS时，此方案单极性多通道采集的有效位数仍然可以达到19.6位，验证了设计的有效性。
ADS125x 是基于Δ－Σ技術的高性能多通道24位模數轉換器（ADC），可實現理論上高達23位的無譟音分辨率和最高30KSPS的數據採樣率。基于嵌入式處理器對ADS125X的單極性、多通道數據採集設計進行瞭實驗，併總結齣在實際使用中高採樣率下提高精度的設計技巧。經有效位數測試錶明，在採樣率為1KSPS時，此方案單極性多通道採集的有效位數仍然可以達到19.6位，驗證瞭設計的有效性。
ADS125x 시기우Δ－Σ기술적고성능다통도24위모수전환기（ADC），가실현이론상고체23위적무조음분변솔화최고30KSPS적수거채양솔。기우감입식처리기대ADS125X적단겁성、다통도수거채집설계진행료실험，병총결출재실제사용중고채양솔하제고정도적설계기교。경유효위수측시표명，재채양솔위1KSPS시，차방안단겁성다통도채집적유효위수잉연가이체도19.6위，험증료설계적유효성。
ADS125x is multi-channel and high-performance 24-bit ADC which is based onΔ-Σtechnology. Theoretically, it can achieve 23-bit noiseless resolution and a maximum 30,000SPS sampling rate. The present study focused on the design of a unipolar and multi-channel data acquisition system with ADS125X based on embedded system. Additionally, it summed up several ways to improve the system's sampling precision with high sampling rate in practice. The test of effective number of bits (ENOB) in this design shows that with 1000 sampling rate, ENOB of unipolar and multi-channel data acquisition can still reach 19.6 bits, which verifies the effectiveness of the scheme.
