The ADS1210 demo board along with the PC software is a complete data acquisition system using the ADS1210 24-bit delta-sigma analog-to-digital converter. The demo board has two microcontrollers and 32K on board memory. It is accessed using a PC program through the PC parallel port. This application note explains the hardware design and the software design of the demo board. The hardware design discusses the system block diagram and the circuit diagram. The software design discusses the data structure and the core procedures for the PC programming. An example of PC Pascal program is provided to illustrate how to access the ADS1210 demo board. With the understanding of the demo board design, a new PC program can be implemented to do the data acquisition using the ADS1210 demo board.