GENERAL DESCRIPTION

The AK4554 is a low voltage 16bit A/D & D/A converter for portable digital audio system. In the AK4554, 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 AK4554 are single-ended, therefore, any external filters are not required. The AK4554 is suitable for portable digital audio system, as the AK4554 is low power dissipation and a small package.

FEATURES

□ HPF for DC-offset cancel (fc=3.4Hz)

□ Single-ended ADC

- S/(N+D): 80dB@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 (AK4550 compatible)

- ADC: 16bit MSB justified

- DAC: 16bit 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/384fs/512fs/768fs (fs=8kHz to 50kHz)

1024fs (fs=8kHz to 25kHz)

□ Power Supply: 1.6 to 3.6V

□ Low Power Supply Current: 8mA

□ Ta = −40 to 85°C

□ Very Small Package: 16pin TSSOP

AK4554属于集成电路（IC） > 编解码器。旭化成微电子株式会社制造生产的AK4554编解码器编解码器是用于通过压缩和解压缩来转换数据的半导体器件。数据压缩可提高传输速度并减少存储空间。某些编解码器提供高达 32 位的分辨率，并且分别提供多达 6 个或 8 个模数转换器和数模转换器。除三角积分调制外，还有 I2C、I2S、SPI、串行、HDA、S/DIF、PCM、USB、AC'97 和 SLIMbus 数据接口。