EVAL-ADAU1850EBZ is an evaluation board for the ADAU1850 three ADCs, one DAC, low power Codec with Audio/Fast DSP. This evaluation board provides access to all analog and digital inputs/outputs on the ADAU1850. The EVAL-ADAU1850EBZ can be powered by the USB bus or by a single 3.8V to 5V supply. These supply options are regulated to the voltages required on the EVAL-ADAU1850EBZ. The printed circuit board (PCB) is a 4-layer design, with a ground plane and a power plane on the inner layers. The EVAL-ADAU1850EBZ contains connectors for external microphones and speakers. The clock can be generated through the internal RC oscillator in the absence of an external clock source. It also can be provided externally or by the on-board 24.576MHz oscillator.