ASAHI KASEI
[AK4355]
MS0063-E-01
2002/07
- 1 -
GENERAL DESCRIPTION
The AK4355 offers the perfect mix for cost and performance based multi-channel audio systems. AKM's
advanced multi-bit architecture delivers a wide dynamic range and low outband noise. The AK4355 has
full differential SCF outputs, removing the need for AC coupling capacitors and increasing performance
for systems with excessive clock jitter. The 24 Bit word length and 192kHz sampling rate make this part
ideal for a wide range of application including DVD-Audio.
FEATURES
o
Sampling Rate: 8kHz to 192kHz
o
24Bit 8 times Digital Filter with Slow roll-off option
o
THD+N: -90dB
o
DR, S/N: 106dB
o
High Tolerance to Clock Jitter
o
Low Distortion Differential Output
o
Digital De -emphasis for 32, 44.1 & 48kHz sampling
o
Zero Detect Pin
o
Channel Independent Digital Attenuator with soft-transition
o
Soft Mute
o
I/F format: 24-Bit MSB justified, 24/20/16-Bit LSB justified or I
2
S
o
Master Clock
Normal Speed: 256fs, 384fs, 512fs or 768fs
Double Speed: 128fs, 192fs, 256fs or 384fs
Quad Speed: 128fs, 192fs
o
Power Supply: 4.75 to 5.25V
o
28pin VSOP Package
SCF
DAC
DATT
DZF
LOUT1+
LOUT1-
SCF
DAC
DATT
ROUT1+
ROUT1-
SCF
DAC
DATT
LOUT2+
LOUT2-
SCF
DAC
DATT
ROUT2+
ROUT2-
SCF
DAC
DATT
LOUT3+
LOUT3-
SCF
DAC
DATT
ROUT3+
ROUT3-
Audio
I/F
Control
Register
AK4355
MCLK
LRCK
BICK
SDTI1
SDTI2
SDTI3
CSN
CCLK
CDTI
192kHz 24-Bit 6ch DAC for DVD-Audio
AK4355
ASAHI KASEI
[AK4355]
MS0063-E-01
2002/07
- 2 -
n
Ordering Guide
AK4355VF -40
+85
C 28pin VSOP (0.65mm pitch)
AKD4355 Evaluation Board for AK4355
n
Pin Layout
6
5
4
3
2
1
VREF
DZF
MCLK
PDN
BICK
SDTI1
7
SDTI3
8
AVDD
AVSS
LOUT1+
LOUT1-
ROUT1+
ROUT1-
LOUT2+
LOUT2-
Top
View
10
9
LRCK
CSN
CCLK
11
CDTI
12
ROUT2+
ROUT2-
LOUT3+
LOUT3-
23
24
25
26
27
28
22
21
19
20
18
17
SDTI2
DVDD
13
DVSS
14
ROUT3+
ROUT3-
16
15
ASAHI KASEI
[AK4355]
MS0063-E-01
2002/07
- 3 -
PIN/FUNCTION
No.
Pin Name
I/O
Function
1
VREF
I
Positive Voltage Reference Input Pin
2
DZF
O
Zero Input Detect Pin
3
PDN
I
Power-Down Mode Pin
When at "L", the AK4355 is in the power-down mode and is held in reset.
The AK4355 should always be reset upon power-up.
4
MCLK
I
Master Clock Input Pin
An external TTL clock should be input on this pin.
5
BICK
I
Audio Serial Data Clock Pin
6
SDTI1
I
DAC1 Audio Serial Data Input Pin
7
SDTI2
I
DAC2 Audio Serial Data Input Pin
8
SDTI3
I
DAC3 Audio Serial Data Input Pin
9
LRCK
I
L/R Clock Pin
10
CSN
I
Chip Select Pin
11
CCLK
I
Control Clock Pin
12
CDTI
I
Control Data Input Pin
13
DVDD
-
Digital Power Supply Pin
14
DVSS
-
Digital Ground Pin
15
ROUT3-
O
DAC3 Rch Negative Analog Output Pin
16
ROUT3+
O
DAC3 Rch Positive Analog Output Pin
17
LOUT3-
O
DAC3 Lch Negative Analog Output Pin
18
LOUT3+
O
DAC3 Lch Positive Analog Output Pin
19
ROUT2-
O
DAC2 Rch Negative Analog Output Pin
20
ROUT2+
O
DAC2 Rch Positive Analog Output Pin
21
LOUT2-
O
DAC2 Lch Negative Analog Output Pin
22
LOUT2+
O
DAC2 Lch Positive Analog Output Pin
23
ROUT1-
O
DAC1 Rch Negative Analog Output Pin
24
ROUT1+
O
DAC1 Rch Positive Analog Output Pin
25
LOUT1-
O
DAC1 Lch Negative Analog Output Pin
26
LOUT1+
O
DAC1 Lch Positive Analog Output Pin
27
AVSS
-
Analog Ground Pin
28
AVDD
-
Analog Power Supply Pin
Note: All input pins should not be left floating.
ASAHI KASEI
[AK4355]
MS0063-E-01
2002/07
- 4 -
ABSOLUTE MAXIMUM RATINGS
(AVSS, DVSS=0V; Note 1)
Parameter
Symbol
min
max
Units
Power Supplies
Analog
Digital
|AVSS-DVSS| (Note 2)
AVDD
DVDD
GND
-0.3
-0.3
-
6.0
6.0
0.3
V
V
V
Input Current (any pins except for supplies)
IIN
-
10
mA
Analog Input Voltage
VINA
-0.3
AVDD+0.3
V
Digital Input Voltage
VIND
-0.3
DVDD+0.3
V
Ambient Operating Temperature
Ta
-40
85
C
Storage Temperature
Tstg
-65
150
C
Note: 1. All voltages with respect to ground.
2. AVSS and DVSS must be connected to the same analog ground plane.
WARNING: Operation at or beyond these limits may results in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
(AVSS, DVSS=0V; Note 1)
Parameter
Symbol
min
typ
max
Units
Power Supplies
(Note 3)
Analog
Digital
AVDD
DVDD
4.75
4.75
5.0
5.0
5.25
5.25
V
V
Voltage Reference
VREF
AVDD-0.5
-
AVDD
V
Note: 1. All voltages with respect to ground.
3. The power up sequence between AVDD and DVDD is not critical.
*AKM assumes no responsibility for the usage beyond the conditions in this datasheet.
ASAHI KASEI
[AK4355]
MS0063-E-01
2002/07
- 5 -
ANALOG CHARACTERISTICS
(Ta=25
C; AVDD, DVDD=5V; VREF=AVDD; fs=44.1kHz; BICK=64fs; Signal Frequency=1kHz; 24bit Input Data;
Measurement frequency=20Hz
20kHz; R
L
4k
; unless otherwise specified)
Parameter
min
typ
max
Units
Resolution
24
Bits
Dynamic Characteristics
(Note 4)
fs=44.1kHz
BW=20kHz
0dBFS
-60dBFS
-90
-42
-86
-
dB
dB
fs=96kHz
BW=40kHz
0dBFS
-60dBFS
-88
-39
-84
-
dB
dB
THD+N
fs=192kHz
BW=40kHz
0dBFS
-60dBFS
-86
-39
-
-
dB
dB
Dynamic Range (-60dBFS with A-weighted) (Note 5)
100
106
dB
S/N (A-weighted) (Note 6)
100
106
dB
Interchannel Isolation (1kHz)
90
100
dB
Interchannel Gain Mismatch
0.2
0.5
dB
DC Accuracy
Gain Drift
100
-
ppm/
C
Output Voltage (Note 7)
3.0
3.2
3.4
Vpp
Load Resistance (Note 8)
4
k
Power Supplies
Power Su pply Current (AVDD+DVDD)
Normal Operation (PDN = "H", fs
96kHz)
Normal Operation (PDN = "H", fs=192kHz)
Power-Down Mode (PDN = "L") (Note 9)
49
55
10
75
80
100
mA
mA
A
Notes: 4. Measured by Audio Precision (System Two) or UPD. Refer to the evaluation board manual.
5. 100dB at 16bit data.
6. S/N does not depend on input bit length.
7. Full-scale voltage (0dB). Output voltage scales with the voltage of VREF,
AOUT (typ.@0dB)=(AOUT+)-(AOUT-)=
3.2Vpp VREF/5.
8. For AC-load. 4k
for DC-load.
9. All digital inputs including clock pins (MCLK, BICK and LRCK) are held DVDD or DVSS.
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