This evaluation board provides a simple analog input and output setup for the AD1940. The SigmaDSP is controlled by the Analog Devices, Inc., SigmaStudio™ software, which interfaces to the board via a USB connection. This evaluation board may be powered either over the USB or by a single 3.8 V to 6 V supply, which is regulated to the voltages required on the board. The PC board is a 3” × 3” 4-layer design, with a single ground plane and a single power plane on the inner layers. The AD1938 codec handles all signal conversion between the analog and digital domains.
