ASAHI KASEI
[AK4317]
0172-E-01
1997/5
- 1 -
AK4317
18Bit SCF DAC with ATT & MIXER
General Description
The AK4317 is a 1bit stereo DAC with channel separated volume and channel mixer. This DAC also
includes 18bit digital filter and analog LPF. A 1bit DAC can achieve monotonicity and low distortion with
no adjustment and is superior to traditional R-2R ladder based DACs. In the AK4317, the loss of
accuracy from clock jitter is also improved by using SCF techniques for on-chip post filter. Therefore, the
AK4317 is suitable for the system like STB including PLL circuit.
Features
Sampling Rate Ranging from 8kHz to 50kHz
On chip Perfect filtering
8 times FIR Interpolator
2nd order SCF
2nd order CTF
Digital de-emphasis for 32, 44.1, 48kHz sampling
L/R Separated Volume
L/R Mixing
Soft Mute
Audio I/F format : MSB justified, LSB justified, I2S
Master Clock: 256fs or 384fs
High Tolerance to Clock Jitter
THD+N: -86dB
DR: 92dB
Power Supply:4.5 to 5.5V
Small Package: 24pin VSOP
AK4311 Compatible
ASAHI KASEI
[AK4317]
0172-E-01
1997/5
- 2 -
Ordering Guide
AK4317-VF
-40
+85
C
24pin VSOP(0.65mm pitch)
AKD4317
Evaluation Board
Pin Layout
Compatibility with AK4311/A
1. Changed Specs
Parameter
AK4311
AK4311A
AK4317
Resolution
16bit
16bit
16/18bit
Operating Temperature
-40
85
C
-10
70
C
-40
85
C
Power Supply
3
5.5V
3
5.5V
4.5
5.5V
Digital I/F level
CMOS
CMOS
TTL
X'tal Oscillator
Yes
Yes
No
DR
92dB
91dB
92dB
Package
SSOP
SSOP
VSOP
2. Pin Compatibility
The following pin functions are changed from AK4311/A. But when X'tal oscillating circuit is not used, it
is possible to change AK4311/A to AK4317 without changing the board layout.
Pin No.
AK4311/A
AK4317
4
XTO
DIF0
6
CLKO
DIF1
ASAHI KASEI
[AK4317]
0172-E-01
1997/5
- 3 -
PIN/FUNCTION
No.
Pin Name
I/O
Function
1
DVDD
-
Digital Power Supply
2
DVSS
-
Digital Ground Pin
3
PD
I
Power-Down Mode Pin
When at "L", the AK4317 is in power-down mode and is held in reset.
The AK4317 should always be reset upon power-up.
4
DIF0
I
Digital Input Format Pin (Internal Pull-down pin)
5
MCLK
I
Master Clock Input Pin
6
DIF1
I
Digital Input Format Pin (Internal Pull-down pin)
7
BICK
I
Audio Serial Data Clock Pin
8
SDATA
I
Audio Serial Data Input Pin
2's complement MSB-first data is input on this pin.
9
LRCK
I
L/R Clock Pin
10
CDATA
I
Control Data Input Pin
Must be tied to "H" or "L" if this pin is not used.
11
CCLK
I
Control Clock Pin
Must be tied to "H" or "L" if this pin is not used.
12
CS
I
Chip Select Pin
Must be tied to "H" if this pin is not used.
13
TST2
O
Test Pin
Must be left floating.
14
SMUTE
I
Soft Mute Pin
When this pin goes "H", soft mute cycle is initiated.
When returning "L", the output mute releases.
15
DEM
I
De-emphasis Enable Pin (Internal Pull-down pin)
16
CKS
I
Master Clock Select Pin
MCLK=256fs,"H": MCLK=384fs
17
AOUT1
O
Channel 1 analog output pin
18
AOUT0
O
Channel 0 analog output pin
19
VCOM
I
Common Voltage Pin, AVDD/2
Normally connected to AVSS with a 0.1uF ceramic capacitor in parallel
with a 10uF electrolytic cap.
20
AVDD
-
Analog Power Supply Pin
21
AVSS
-
Analog Ground pin
22
VREF
I
Voltage Reference Input Pin
The differential Voltage between this pin and AVSS set the analog output
range. Normally connected to AVSS with a 0.1uF ceramic capacitor.
23
DZF
O
Zero Input Detect Pin
24
TST1
I
Test Pin
Must be left floating or tied to AVSS.
Note: All input pins except pull-down pins should not be left floating.
ASAHI KASEI
[AK4317]
0172-E-01
1997/5
- 4 -
ABSOLUTE MAXIMUM RATINGS
(AVSS,DVSS=0V; Note 1 )
Parameter
Symbol
min
max
Units
Power Supplies:
Analog
Digital
DADD-AVDD
AVDD
DVDD
VDA
-0.3
-0.3
-
6.0
6.0
0.3
V
V
V
Input Current, Any Pin Except Supplies
IIN
-
10
mA
Input Voltage
VIND
-0.3
AVDD+0.3
V
Ambient Operating Temperature
Ta
-40
85
C
Storage Temperature
Tstg
-65
150
C
Note: 1 . All voltages with respect to ground.
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
(AVSS,DVSS=0V; Note 1 )
Parameter
Symbol
min
typ
max
Units
Power Supplies:
Analog (Note 2 )
Digital
AVDD
DVDD
4.5
4.5
5.0
5.0
5.5
AVDD
V
V
Voltage Reference (Note 3 )
VREF
2.5
-
AVDD
V
Notes: 2. AVDD and DVDD should be powered at the same time or AVDD should be powered earlier
than DVDD.
3. Analog output voltage scales with the voltage of VREF.
AOUT(typ.@0dB)=2.8Vpp*VREF/5.
* AKM assumes no responsibility for the usage beyond the conditions in this data sheet.
ASAHI KASEI
[AK4317]
0172-E-01
1997/5
- 5 -
ANALOG CHARACTERISTICS
(Ta=25
C; AVDD,DVDD=5.0V; VREF=AVDD; fs=44.1kHz; Signal Frequency=1kHz; 18bit Input Data;
Measurement Bandwidth=10Hz
20kHz; R
L
10k
; unless otherwise specified)
Parameter
min
typ
max
Units
Resolution
18
Bits
Dynamic Characteristics
(Note 4 )
THD+N (0dB Output)
-80
-86
dB
Dynamic Range (-60dB Output, A weight)
88
92
dB
S/N (A weight)
88
92
dB
Interchannel Isolation(1kHz)
80
90
dB
DC Accuracy
Interchannel Gain Mismatch
0.15
0.3
dB
Gain Drift
(Note 5 )
20
-
ppm/
C
DC Accuracy
Output Voltage
(Note 6 )
2.66
2.8
2.94
Vpp
Load Resistance
10
k
Power Supplies
Power Supply Current
Normal Operation (PD="H")
AVDD
DVDD
Power-Down-Mode (PD="L")
AVDD+DVDD
(Note 7 )
12
4
10
18
6
50
mA
mA
uA
Power Dissipation (AVDD+DVDD)
Normal Operation
Power-Down-Mode
(Note 7 )
80
50
120
mW
uW
Power Supply Rejection
(Note 8 )
50
dB
Notes: 4. Measured by AD725C(SHIBASOKU). Averaging mode. Refer to the eva board manual.
5. The voltage on VREF pin is held +5V externally.
6. Full-scale voltage(0dB). Output voltage scales with the voltage of VREF pin.
AOUT(typ.@0dB)=2.8Vpp*VREF/5.
7. Power Dissipation in the power-down mode is applied with no external clocks
(MCLK,BICK,LRCK held "H" or "L").
8. PSR is applied to AVDD,DVDD with 1kHz, 100mVpp. VREF pin is held +5V.
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