Pipelined Analog-to-Digital Converter（ADC）can achieves high conversion rate and medium to high resolution at very low power consumption,which is widely used in data acquisition systems in the application of radar,communication,medical image and precision control area.The basic principle and the latest development of pipelined ADC are introduced.A 14-bit 125 MSPS data acquisition system based on pipelined ADC is designed to meet the need of high-speed signal sampling.Tested results show the data acquisition system achieves spurious free dynamic range（SFDR）of 84 dB,signal-to-noise ratio（SNR）of 65dB for a 4.9MHz input at 75Msps sampling rate.%由于流水线模数转换器（ADC）能在较低的功耗条件下实现中、高精度高速数据采样功能,因而被广泛应用于雷达、通信、医学成像、精确控制等技术领域的数据采集系统。文章介绍了流水线ADC的基本原理及其最新研究成果,并且基于流水线ADC完成了一种14位精度125Msps高速数据采集系统的设计。测试结果表明,该系统在75Msps采样速率下对于4.9MHz输入信号的信噪比达到65dB,无杂散动态范围（SFDR）达84dB,满足系统的性能需求。
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