ASAHI KASEI
[AK4360]
MS0072-E-01
2001/04
- 1 -
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
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
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@16
(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
BOOST
SDATA
LRCK
BICK
DIF
HPVCC
HPGND
DEM
Audio
I/F
Low
Freq
Boost
8X
Interpolator
Modulator
SCF
HP-AMP
AOUTL
8X
Interpolator
Modulator
SCF
HP-AMP
AOUTR
De-emphasis
Control
Voltage
Reference
VCOM
VREF
VDD
VSS
Mute Circuit
MUTEN
MT1
MT0
Clock Divider
CKS
MCLK
PDN
Low Power 2ch
DAC with HP-AMP
AK4360
ASAHI KASEI
[AK4360]
MS0072-E-01
2001/04
- 2 -
n
Ordering Guide
AK4360VF -10
+70
C 24pin VSOP (0.65mm pitch)
AKD4360 Evaluation Board for AK4360
n
Pin Layout
MUTEN
BOOST
SDATA
MCLK
PDN
1
2
3
24
23
22
4
5
6
7
8
9
10
11
12
BICK
LRCK
MT0
MT1
DEM
CKS
DIF
21
20
19
18
17
16
15
14
13
TST1
TST2
VDD
VSS
VREF
VCOM
TST3
HPVCC
HPGND
NC
AOUTL
AOUTR
Top
View
ASAHI KASEI
[AK4360]
MS0072-E-01
2001/04
- 3 -
PIN/FUNCTION
No.
Pin Name
I/O
Function
1
MCLK
I
Master Clock Pin
2
PDN
I
Power-Down Pin (Internal pull-down pin)
When at "L", the AK4360 is in power-down mode and is held in reset.
The AK4360 should always be reset upon power-up.
3
BICK
I
Audio Serial Data Clock Pin
4
SDATA
I
Audio Serial Data Input Pin
5
LRCK
I
Input/Output Channel Clock Pin
6
MT0
I
7
MT1
I
MUTE Timer select Pin
8
DEM
I
De-emphasis Enable Pin
When at "H", de-emphasis of fs=44.1kHz is enabled.
9
MUTEN
I
Mute pin (Internal pull-down pin)
When at "L", analog outputs are muted.
(Analog outputs are connected to HPGND.)
10
BOOST
I
Low Frequency Boost Enable Pin
"H": Enable "L": Disable
11
CKS
I
Master Clock Select Pin
"L": 256fs "H": 384fs
12
DIF
I
Digital I/F format pin (Internal pull-down pin)
"L": 16bit LSB justified, "H": IIS compatible
13
AOUTR
O
Rch Analog Output Pin
14
AOUTL
O
Lch Analog Output Pin
15
NC
-
NC pin (No internal bonding)
16
HPGND
-
Ground Pin for Headphone Amplifier
17
HPVCC
-
Power Supply Pin for Headphone Amplifier
18
TST3
O
Test Pin (Always Open)
19
VCOM
O
Common Voltage Pin, 0.48V (typ, respects to VSS)
Normally connected to VSS pin with a 0.1
F ceramic capacitor in parallel with
a 1.0
F electrolytic capacitor.
20
VREF
O
Reference Voltage Output Pin, 1.2V (typ, respects to VSS)
Normally connected to VSS pin with a 0.1
F ceramic capacitor in parallel with
a 1.0
F electrolytic capacitor.
21
VSS
-
Ground Pin for D/A Converter
22
VDD
-
Power Supply Pin for D/A Converter
23
TST2
O
Test Pin
24
TST1
I
Test Pin (Internal pull-down pin)
Note: All input pins except NC and pull-down pins should not be left floating.
ASAHI KASEI
[AK4360]
MS0072-E-01
2001/04
- 4 -
ABSOLUTE MAXIMUM RATINGS
(VSS, HPGND=0V; Note 1)
Parameter
Symbol
min
max
Units
Power Supplies
DAC
HP-AMP
|VSS HPGND| (Note 2)
VDD
HPVCC
GND
-0.3
-0.3
-
4.6
4.6
0.3
V
V
V
Input Current (any pins except for supplies)
IIN
-
10
mA
Input Voltage
VIND
-0.3
VDD+0.3 or 4.6
V
Ambient Temperature
Ta
-10
70
C
Storage Temperature
Tstg
-65
150
C
Note 1. All voltages with respect to ground.
Note 2. VSS and HPGND is same voltage.
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
(VSS, HPGND=0V; Note 1)
Parameter
Symbol
min
typ
max
Units
Power Supplies
DAC
HP-AMP
VDD
HPVCC
1.8
0.9
2.0
1.2
3.3
3.3
V
V
Note 1. All voltages with respect to ground.
*AKM assumes no responsibility for the usage beyond the conditions in this data sheet.
ASAHI KASEI
[AK4360]
MS0072-E-01
2001/04
- 5 -
ANALOG CHARACTERISTICS
(Ta=25
C; VDD=2.0V, HPVCC=1.2V, VSS=HPGND=0V; fs=44.1kHz; BICK=64fs; Signal Frequency=1kHz;
Measurement frequency=10Hz
20kHz; Load impedance is a serial connection with R
L
=16
and C
L
=220
F;
unless otherwise specified)
Parameter
min
typ
max
Units
Headphone Output Dynamic Characteristics: (Note 3)
THD+N (0dB Output, 6.5mW)
(-11dB Output, 0.5mW)
(-30dB Output)
-20
-48
-60
-
-40
-
dB
dB
dB
Dynamic Range (-60dB Output, A-weight)
86
92
dB
S/N (A-weight)
86
92
dB
Interchannel Isolation
75
90
dB
DC Accuracy
Interchannel Gain Mismatch
0.3
0.5
dB
Gain Drift
-
200
-
ppm/
C
Output Voltage (-11dB Output)
0.235
0.275
0.315
Vpp
Load Resistance
16
Power Supplies
Power Supply Current
Normal Operation (PDN = MUTEN= "H")
VDD
HPVCC (Digital "0" Data Input)
Power-Down Mode (PDN = MUTEN= "L")
VDD+HPVCC (Note 4)
4.0
3.4
10
6.0
6.5
100
mA
mA
A
Power Supply Rejection (Note 5)
-
50
-
dB
Note 3. Measured by Audio Precision, System Two.
Note 4. In case of power-down mode (PDN = MUTEN = "L"), all digital input pins including clock pins (MCLK, BICK
and LRCK) are held VDD or VSS.
Note 5. PSR is applied to VDD with 1kHz, 100mVpp.
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