ASAHI KASEI

[AK4309B]

0177-E-00

1997/6

- 1 -

AK4309B

16Bit SCF DAC for Multimedia

General Description

The AK4309B is a 1bit stereo DAC for multimedia audio systems. A 1bit DAC can achieve monotonicity and

low distortion with no adjustment and is superior to traditional R-2R ladder based DACs. In the AK4309B, the

loss of accuracy from clock jitter is also improved by using SCF techniques for on-chip post filter. The

AK4309B includes continuous time filter with single end output and does not need any external parts. The

master clock can be either 256fs or 384fs, supporting various audio environment.

Features

† Sampling Rate Ranging from 8kHz to 50kHz

† On chip Perfect filtering

† On chip Buffer with Single End Output

† Master Clock: 256fs or 384fs

† High Tolerance to Clock Jitter

† TTL Level Digital Interface

† THD+N: -84dB

† Dynamic Range: 90dB

† Output Level: 3.4Vpp

† Power Supply: 5V±10%

† Low Power Dissipation: 80mW at 5V

† Small Package: 20pin SSOP

† Pin Compatible with AK4310/4309A