Abstract: We prosented a method for fast evaluation of seismic data acquisition circuit boards based on digital audio interface in the field of broadband seismic observation technique. During the design process of normal data acquisition circuit,we add an S/PDIF digital audio interface to the analog/digital conversion circuit,to encode the analog/digital conversion results into data that meet audio transfer standard,and to transfer the encoded data to computer via external sound card,and then to perform data process such as digital decimation filtering ,spectrum analysis,etc.,so as to realize fast evaluation of data acquisition circuit board.The experimental results show that this method is clear in thinking, simple in implementation,and the test result is effective and reliable.It can solve problem in routine test evaluation,and has a strong practical and application prospect in the design and test evaluation of high resolution,high sampling rate data acquisition system.

Key words: Data acquisition circuit, Analog/digital conversion (ADC), Digital audio interface, Fast evaluation method, Dynamic range