This user's guide describes the characteristics, operation, and use of the ADS1675REF reference design? board. This reference design board (REF) is an evaluation platform for the ADS1675, a 4MSPS, high-speed, high-precision, 24-bit analog-to-digital converter (ADC). The ADS1675REF allows evaluation of all aspects of the ADS1675 device. A complete circuit description as well as schematic diagram and bill of materials are included.