基于AD9548的数据同步采集系统设计

Design of data synchronizing acquisition system based on AD9548

为了去除电磁环境测量时背景噪声中的同频干扰,采用自适应噪声对消技术。而这需要两个通道采集的信号严格同步,因此本系统利用AD9548时钟同步芯片控制双通道同步采集。AD9548是ADI公司推出的利用GPS信号作为时钟基准的高性能时钟同步芯片,可通过SPI或I2C串行通信接口进行参数配置。本设计充分利用了AD9548芯片的高精度时钟同步功能,解决了电磁环境精确测量中数据同步采集的难题,并有快速采样、同步精度高、应用领域广等优点。

In order to eliminate the same frequency interference from the background noise in the process of tof electromagnetic environment, the technology of adaptive noise cancellation is adopted, which demands the signal collected to be accurately synchronizing. So the AD9548 is used for realize the synchronizing data acquisition. The AD9548 is a device for providing synchronization for many systems by using GPS signals, which is produced by ADL The AD9548 serial control port allows read/write access to the AD9548 register map, which includes Philips I2C and Motorola SPI. In the paper, a dualchannel data synchronizing acquisition system based on AD9548 is presented, which could realize the data synchronizing acquisition in the process of measurement of electromagnetic environment. The dual-channel data synchronizing acquisition system has lots of advantages such as high sampling frequency, high synchronization precision and wide application field.