ASAHI KASEI
[AK4360]
AK4360
Low Power 2ch
∆Σ
DAC with HP-AMP
GENERAL DESCRIPTION
The AK4360 is a 20bit low voltage & power DAC with Headphone Amplifier for digital audio system. The
AK4360 uses the new developed Multi-Bit
∆Σ
architecture, this new architecture achieves S/N=92dB at
low voltage operation. The AK4360 integrates SCF increasing performance for systems with excessive
clock jitter. The low power and small package make this point ideal for the portable audio system like MD,
MP3, etc.
FEATURES
•
Advanced Multi-Bit
∆Σ
DAC
•
Sampling Rate Ranging: 8kHz
∼
50kHz
•
On chip perfect filtering 8 times FIR interpolator
•
Digital de-emphasis for 44.1kHz sampling
•
Master clock: 256fs or 384fs
•
Digital Audio I/F Format: 2’s compliment, MSB first
- 20bit I
2
S or 16bit LSB justified
•
THD+N: -48dB (-11dB output)
•
D-Range, S/N: 92dB
•
Low Frequency Boost Function
•
Click Noise Free Circuit
•
On chip Headphone Amplifier
- 6.5mW x 2ch@16Ω (THD+N = 10%, HPVCC = 1.2V)
•
Low Voltage Operation: DAC: 2V (1.8V∼3.3V), HP-AMP: 1.2V (0.9V∼3.3V)
•
Low power Dissipation: 12mW
•
Ta = -10
∼
70°C
•
Small Package: 24pin VSOP
DIF
DEM
HPVCC
HPGND
VREF
BICK
LRCK
SDATA
∆Σ
Modulator
∆Σ
Modulator
Audio
I/F
De-emphasis
Control
Voltage
Reference
VCOM
BOOST
Low
Freq
Boost
8X
Interpolator
SCF
HP-AMP
AOUTL
8X
Interpolator
VDD
VSS
SCF
HP-AMP
AOUTR
Clock Divider
Mute Circuit
PDN
MCLK
CKS
MT0 MT1 MUTEN
MS0072-E-00
-1-
2001/01
AKM [ ASAHI KASEI MICROSYSTEMS ]
