中文摘要：

采用主从式结构,设计一种井下模数转换器（ADC）高温测试系统。系统主机通过以太网与嵌入式前端机互联。基于ARM7-uC linux架构的前端机主要完成温度控制、供电控制及ADC测试控制等,而后续的数据处理、显示及存储等任务由高性能上位机完成。数字相敏检波算法被成功应用于ADC有效位数的快速实时计算。结果表明,测试系统可以完成高温下（175℃）ADC垂直精度、功耗的定量连续测试及失码、波形畸变等工作不稳定状态的识别,为测井仪器数据采集电路的设计、调试和性能检测提供重要的依据。

英文摘要：

Based on principal and subordinate structure,high temperature test system for high-accurate analog-to-digital converter（ADC） was designed.The host PC interconnects with embedded front-end via Ethernet.The embedded front-end based on ARM-uClinux structure performs temperature control,power supply control and ADC test control,etc.The subsequent data processing,display and storage tasks are handled by host PC.The results show that digital phase sensitive detection algorithm is successfully applied to real-time calculation of effective number of bits.The system can automatically perform testing of ADCs vertical accuracy,power consumption,loss code and waveform distortion at 175 ℃.It provides important reference for the design,debugging and scale of logging tools.