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AK4309B

Asahi Kasei Microsystems
Part Number AK4309B
Manufacturer Asahi Kasei Microsystems
Description 16BIT SCF DAC FOR MULTIMEDIA
Published Mar 23, 2005
Detailed Description ASAHI KASEI [AK4309B] AK4309B 16Bit SCF DAC for Multimedia General Description The AK4309B is a 1bit stereo DAC for mu...
Datasheet PDF File AK4309B PDF File

AK4309B
AK4309B

Overview
ASAHI KASEI [AK4309B] 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 • 8 times FIR Interpolator • 2nd order SCF and CTF • Total Response: ±0.
5dB at 20kHz † 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 0177-E-00 -1- 1997/6 ASAHI KASEI [AK4309B] „ Ordering Guide AK4309BVM AKD4309B 20pin SSOP(0.
65mm pitch) -10∼ +70° C Evaluation Board (AK4309B's board is the same as AK4310's) „ Pin Layout „ Compatibility with AK4310/09A Parameter Power Supply Digital I/F level DR Output Voltage Click Noise Function of Pin 4 Package AK4310 3∼ 5.
5V CMOS 92dB 2.
8Vpp High AK4309A 4.
5∼ 5.
5V TTL 91dB 3.
4Vpp Middle AK4309B 4.
5∼ 5.
5V TTL 90dB 3.
4Vpp Low NC 20SSOP PD 24SSOP PD 24SSOP 0177-E-00 -2- 1997/6 ASAHI KASEI [AK4309B] PIN/FUNCTION No.
1 2 3 4 5 Pin Name TST1 DVDD DVSS NC I/O I I Function Test Pin (Pull-down pin) Must be left floating or tied to DVSS.
Digital Power Supply Pin Digital Ground Pin No Connection Reset Pin When at "L", the AK4309B is in power-down mode and is held in reset.
The AK4309B should always be reset upon power-up.
Master Clock Input Pin An external TTL clock should be input on this pin.
The fs is sele...


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