GENERAL DESCRIPTION
The AK4551 is a low voltage 20bit A/D & D/A converter for portable digital audio system. In the AK4551, the loss of accuracy form clock jitter is also improved by using SCF techniques for on-chip post filter. Analog signal input/output of the AK4551 are single-ended, therefore, any external filters are not required. The AK4551 is suitable for portable digital audio system, as the AK4551 is lower power dissipation and a smaller package than AK4519.

FEATURES
□ HPF for DC-offset cancel (fc=3.4Hz)
□ Single-ended ADC
    - S/(N+D): 82dB@VDD=2.5V
    - Dynamic Range, S/N: 89dB@VDD=2.5V
□ Single-ended DAC
    - Digital de-emphasis for 32kHz, 44.1kHz, 48kHz sampling
    - S/(N+D): 85dB@VDD=2.5V
    - Dynamic Range, S/N: 92dB@VDD=2.5V
□ Audio I/F format: MSB First, 2’s Compliment (AK4519 compatible)
    - ADC: 20bit MSB justified
    - DAC: 20bit LSB justified
□ Input/Output Voltage: 0.6 X VDD (=1.5Vpp@VDD=2.5V)
□ High Jitter Tolerance
□ Sampling Rate: 8kHz to 50kHz
□ Master Clock: 256fs or 384fs or 512fs
□ Power Supply: 2.2 to 3.6V
□ Low Power Supply Current: 10mA
□ Ta = -20 to 85°C
□ Very Small Package: 16pin TSSOP