This application note describes the evaluation board for the AD7890 12-bit serial data acquisition system. The AD7890 is an eight-channel 12-bit data acquisition system which operates from a single +5 V supply and contains an input multiplexer, on-chip track-and-hold amplifier, high speed 12-bit ADC, 2.5 V reference and a high speed serial interface. The AD7890 accepts an analog input range of ±10 V, 0 to 4.096 V or 0 V to +2.5 V depending on the version of the part being used.