摘要
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 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＆#39;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.
出处
《电子设计工程》
2015年第8期97-99,共3页
Electronic Design Engineering
关键词
电子技术
数据采集
ADS125x
多通道
高精度
technology of electronics
data acquisition
ADS125x
multi-channel
high precision
