ASAHI KASEI
[AK4522]
20Bit Stereo
∆Σ
ADC & DAC
AK4522
GENERAL DESCRIPTION
The AK4522 has a dynamic range of 100dB and is well-suited middle-range MD, surround system,
musical instruments and car audio. Signal inputs and outputs are single-ended. The DAC outputs are
analog filtered to remove out of band noise. External components are minimized. The AK4522 is available
in a small 24pin VSOP package, which will reduce system space.
FEATURES
• ∆Σ
Stereo ADC
- 64x Oversampling
- Sampling Rate Ranging from 16kHz to 48kHz
- S/(N+D): 92dB
- Dynamic Range, S/N: 100dB
- Digital HPF for offset cancellation
• ∆Σ
Stereo DAC
- 128x Oversampling
- Sampling Rate Ranging from 16kHz to 48kHz
- 2nd order SCF + 2nd order CTF
- Digital de-emphasis for 32kHz, 44.1kHz, 48kHz sampling
- S/(N+D): 90dB
- Dynamic Range, S/N: 100dB
- Soft Mute
•
High Jitter Tolerance
•
Master Clock: 256fs, 384fs, 512fs
•
Analog Power Supply: 4.5 to 5.5V, Digital Power Supply: 2.7 to 5.5V
•
Small VSOP Package: 24pin VSOP
VA
AINL+
AINL-
AINR+
AINR-
VREFH
VCOM
Common Voltage
LPF
∆Σ
Modulator
∆Σ
Modulator
8x
Interpolator
AGND
VD DGND
Decimation
Filter
CMODE
Clock
Divider
∆Σ
Modulator
∆Σ
Modulator
HPF
MCKI
LRCK
Decimation
Filter
HPF
SCLK
Serial I/O
Interface
SDTO
SDTI
DIF0
DIF1
SMUTE
AOUTL
AOUTR
LPF
8x
Interpolator
PD
DEM0 DEM1
M0020-E-01
-1-
1998/10