GENERAL DESCRIPTION

The AK4555 is a low voltage 20bit A/D & D/A converter for portable digital audio system. In the AK4555, 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 AK4555 are single-ended, therefore, any external filters are not required. The AK4555 is suitable for portable digital audio system, as the AK4555 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

- ADC, DAC: I2S

□ 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: 8.6mA

□ Ta = ?40 to 85°C

□ Very Small Package: 16pin TSSOP

AK4555VT屬于集成電路（IC） > 編解碼器。旭化成微電子株式會社制造生產(chǎn)的AK4555VT編解碼器編解碼器是用于通過壓縮和解壓縮來轉(zhuǎn)換數(shù)據(jù)的半導(dǎo)體器件。數(shù)據(jù)壓縮可提高傳輸速度并減少存儲空間。某些編解碼器提供高達 32 位的分辨率，并且分別提供多達 6 個或 8 個模數(shù)轉(zhuǎn)換器和數(shù)模轉(zhuǎn)換器。除三角積分調(diào)制外，還有 I2C、I2S、SPI、串行、HDA、S/DIF、PCM、USB、AC'97 和 SLIMbus 數(shù)據(jù)接口。