中文摘要：

TI公司推出的 ADS1298和 ADS1252两集成芯片是开发生物电采集系统的理想器件，本文先对两芯片用于生物电采集时的采样配置机制进行了归纳总结；在此基础上，提出了两芯片用于普通心电采集时的具体采样配置方案，并对两芯片具体配置方案的性能进行了仿真。本文还基于 ADS1298和单片机C8051F320搭建了一实际普通心电采集系统，并按提出的采样配置方案进行了配置，实际测到了心电图，并实际测试了所实现系统的幅频响应，与仿真结果基本一致。相信本文的讨论对两芯片用于生物电采集时的采样配置会有参考作用。

英文摘要：

ADS1298 and ADS1252 are two wonderful ICs issued by TI company,which can be used for bioelectricity acquisition system.In this paper,the mechanisms of sampling configuration of the two ICs are summarized first.For ADS1 2 9 8 configuration,there are two first-time sampling modes to be selected,one is high-precision mode with the first-time sampling rate 512 kHz,and the other is the low-power mode with its first-time sampling rate 256 kHz;then a low-pass filter is configured with an order parameter N,and its frequency response is of SINC type function.For ADS1 2 5 2 ,the external clock is divided by 6 ,getting the first-time sample rate,and then also a SINC low-pass filter is used with a fixed order parameter 64.After filtering,for both ICs,a resampling process with certain rate is performed,and then the final data are output to us for collection.On basis of these,the specific sampling configuration schemes for typical ECG acquisition systems with the two ICs are proposed,and the corresponding performance are simulated.ADS1 2 9 8 is configured to a high-precision mode,its resampling parameter N is configured with 1024,and ADS1252’s system clock is set as 0.192 MHz,so that both ICs can get the same final sampling rate of 500 Hz.The paper also built a real typical ECG acquisition system with ADS 1298 and C8051F320 configured using the proposed scheme,which has been able to acquire the real ECG signals.After test,basically,the amplitude frequency response of the real system is consistent with the simulated result.It is believed that this work is useful for the sampling configuration of the two ICs when used in bioelectricity acquisition applications.