GENERAL DESCRIPTION
AKD4551 is an evaluation board for the portable digital audio 20bit A/D and D/A converter, AK4551. The AKD4551 can evaluate A/D converter and D/A converter separately in addition to loopback mode (A/D → D/A). The A/D section can be evaluated by interfacing with AKM’s DAC evaluation boards directly. The AKD4551 has the interface with AKM’s wave generator using ROM data and AKM’s ADC evaluation boards. Therefore, it’s easy to evaluate the D/A section. The AKD4551 also has the digital audio interface and can achieve the interface with digital audio systems via opt-connector.

FUNCTION
• Compatible with 2 types of interface
    - Direct interface with AKM’s A/D & D/A converter evaluation boards
    - DIT/DIR with optical input/output
• BNC connector for an external clock input