ASAHI KASEI
[AK4588]
MS0287-E-01
2004/03
- 1 -
GENERAL DESCRIPTION
The AK4588 is a single chip CODEC that includes two channels of ADC and eight channels of DAC. The
ADC outputs 24bit data and the DAC accepts up to 24bit input data. The ADC has the Enhanced Dual Bit
architecture with wide dynamic range. The DAC introduces the new developed Advanced Multi-Bit
architecture, and achieves wider dynamic range and lower outband noise. The AK4588 has a dynamic
range of 102dB for ADC, 106dB for DAC and is well suited for digital surround for home theater and car
audio. The AK4588 also has the balance volume control corresponding to the Dolby Digital (AC-3)
system.
The also has digital audio receiver (DIR) and transmitter (DIT) compatible with 192kHz, 24bits. The DIR
has 8-channel input selector and can automatically detect a Non-PCM bit stream. The AK4588 provides
a fully compatibility of hardware and software with the AK4628 and the AK4114.
*AC-3 is a trademark of Dolby Laboratories.
FEATURES
ADC/DAC part
2ch 24bit ADC
- 64x Oversampling
- Sampling Rate up to 96kHz
- Linear Phase Digital Anti-Alias Filter
- Single-Ended Input
- S/(N+D): 92dB
- Dynamic Range, S/N: 102dB
- Digital HPF for offset cancellation
- Overflow flag
8ch 24bit DAC
- 128x Oversampling
- Sampling Rate up to 192kHz
- 24bit 8 times Digital Filter
- Single-Ended Outputs
- On-chip Switched-Capacitor Filter
- S/(N+D): 90dB
- Dynamic Range, S/N: 106dB
- Individual channel digital volume with 128 levels and 0.5dB step
- Soft mute
- Zero Detect Function
High Jitter Tolerance
Extenal Master Clock Input:
- 256fs, 384fs, 512fs (fs=32kHz
48kHz)
- 128fs, 192fs, 256fs (fs=64kHz
96kHz)
- 128fs (fs=120kHz
192kHz)
2/8-Channel Audio CODEC with DIR
AK4588
ASAHI KASEI
[AK4588]
MS0287-E-01
2004/03
- 2 -
DIR/DIT Part
AES3, IEC60958, S/PDIF, EIAJ CP1201 Compatible
Low jitter Analog PLL
PLL Lock Range : 32kHz to 192kHz
Clock Source: PLL or X'tal
8-channel Receiver input
2-channel Transmission output (Through output or DIT)
Auxiliary digital input
De-emphasis for 32kHz, 44.1kHz, 48kHz and 96kHz
Detection Functions
- Non-PCM Bit Stream Detection
- DTS-CD Bit Stream Detection
- Sampling Frequency Detection
(32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz)
- Unlock & Parity Error Detection
- Validity Flag Detection
Up to 24bit Audio Data Format
Audio I/F: Master or Slave Mode
40-bit Channel Status Buffer
Burst Preamble bit Pc and Pd Buffer for Non-PCM bit stream
Q-subcode Buffer for CD bit stream
Serial
P I/F
Two Master Clock Outputs: 64fs/128fs/256fs/512fs
TTL Level Digital I/F
4-wire Serial and I
2
C Bus
P I/F for mode setting
Operating Voltage: 4.5 to 5.5V with 5V tolerance
Power Supply for output buffer: 2.7 to 5.5V
80pin LQFP Package (0.5mm pitch)
ASAHI KASEI
[AK4588]
MS0287-E-01
2004/03
- 3 -
Block Diagram
Input
Selector
Clock
Recovery
Clock
Generator
DAIF
Decoder
AC-3/MPEG
Detect
DEM
P I/F
Audio
I/F
X'tal
Oscillator
PDN
INT0
LRCK2
BICK2
SDTO2
DAUX2
MCKO2
XTO
XTI
R
PVDD
PVSS
CDTI
CDTO
CCLK
CSN
DVDD
DVSS
TVDD
MCKO1
I2C
RX0
RX1
RX2
RX3
RX4
RX5
RX6
RX7
DIT
TX0
Error &
Detect
STATUS
INT1
Q-subcode
buffer
TX1
B,C,U,
VOUT
8 to 3
VIN
Audio
I/F
LPF
LPF
LPF
LPF
LPF
LPF
LOUT1
ROUT1
LOUT2
ROUT2
LOUT3
ROUT3
DAC
DATT
DEM
ADC
HPF
ADC
HPF
RIN
LIN
LRCK1
BICK1
SDTI1
SDTI2
SDTI3
DAUX1
MCLK
LRCK
BICK
SDOUT
SDIN1
SDIN2
SDIN3
MCLK
SDTO1
Format
Converter
SDTI4
SDIN4
LPF
LPF
LOUT4
ROUT4
DAC
DATT
DEM
DAC
DATT
DEM
DAC
DATT
DEM
DAC
DATT
DEM
DAC
DATT
DEM
DAC
DATT
DEM
DAC
DATT
DEM
AVDD
AVSS
ASAHI KASEI
[AK4588]
MS0287-E-01
2004/03
- 4 -
Ordering Guide
AK4588VQ -10
+70C 80pin LQFP(0.5mm pitch)
AKD4588 Evaluation Board for AK4588
Pin Layout
(Top View)
CC
LK
/
S
C
L
C
D
T
I/S
D
A
CS
N
DA
UX
1
SD
T
I
4
SD
T
I
3
SD
T
I
2
SD
T
I
1
XT
L
1
XT
L
0
PD
N
MA
S
T
E
R
DZ
F
2
DZ
F
1
LO
U
T
4
N
C
RO
UT
4
N
C
LO
U
T
3
N
C
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
INT1
BOUT
TVDD
DVDD
DVSS
XTO
XTI
TEST3
MCKO2
MCKO1
COUT
UOUT
VOUT
SDTO2
BICK2
LRCK2
SDTO1
BICK1
LRCK1
CDTO
TEST1
RX1
NC
RX0
AVSS
AVDD
VREFH
VCOM
RIN
LIN
NC
ROUT1
NC
LOUT1
NC
ROUT2
NC
LOUT2
NC
ROUT3
IN
T
0
TX
1
TX
0
MC
L
K
VIN
DA
U
X
2
I2
C
RX
7
CA
D
1
RX
6
CA
D
0
RX
5
T
EST
2
RX
4
PV
D
D
R
P
VSS
RX
3
NC
RX
2
ASAHI KASEI
[AK4588]
MS0287-E-01
2004/03
- 5 -
Compatibility with AK4628 + AK4114
Functions AK4628+
AK4114
AK4588
Parallel control mode
Yes
No
TDM0, DFS0, DZFE, SDOS,
SMUTE pins
Available Not
available
AK4628: Set by CAD1/0 pins
ADC/DAC part: Set by CAD1/0 pins
4 wire serial
(I2C pin= "L")
AK4114: Fixed to "00"
DIR/DIT part: Fixed to "00"
AK4628: Set by CAD1/0 pins
ADC/DAC part: Set by CAD1/0 pins
Chip
address(*)
I
2
C Bus
(I2C pin = "H")
AK4114: Set by CAD1/0 pins
DIR/DIT part: Fixed to "00"
(*) The AK4588 has two register maps including ADC/DAC part (compatible with the AK4628) and DIR/DIT part
(compatible with AK4114). Each register is selected by Chip Address.
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