ASAHI KASEI [AK4393]
A
AK4393
Advanced Multi-Bit 96kHz 24-Bit
DS
DAC
GENERAL DESCRIPTIO N
The AK4393 is a high performance stereo DAC for the 96kHz sampling mode of DAT, DVD including a
24bit digital filter. The AK4393 introduces the advanced multi-bit system for DS modulator. This new
architecture achieves the wider dynamic range, while keeping much the same superior distortion
characteristics as conventional Single-Bit way. In the AK4393, the analog outputs are filtered in the
analog domain by switched-capacitor filter (SCF) with high tolerance to clock jitter. The analog output s
are full differential output, so the device is suitable for hi-end applications. The operating voltages support
analog 5V and digital 3.3V, so it is easy to I/F w it h 3. 3V logic IC.
FEATURES
· 128x Oversampling
· Sampling Rate up to 108kHz
· 24Bit 8x Digital Filter
Ripple: ±0.005dB, Attenuation: 75dB
· High Tolerance to Clock Jitter
· Low Distortion Differenti al Output
· Digital de-emphasis for 32, 44.1, 48 & 96kHz sampling
· Soft Mute
· THD+N: -100dB
· DR, S/N: 120dB
· I/F format : MSB justified, 16/20/24bit LSB justified, I
2
S
· Master Clock: Normal Speed: 256fs, 384fs, 512fs or 768fs
Double Speed: 128fs, 192fs, 256fs or 384fs
· Power Supply: 4.75 to 5.25V (Analog), 3 to 5. 25V (Digital)
· Small Package: 28pin VSOP
LRCK
BICK
SDAT
PDN
SMUTE
DFS
Audio Data
Interface
De-emphasis
Soft Mute
De-emphasis
Soft Mute
DIF2DIF1DIF0
DEM0DVDD
DEM1
De-emphasis
Control
8x
Interpolator
8x
Interpolator
DS
Modulator
DS
Modulator
AVDD
SCF
AVSSDVSS
BVSS
VCOM
AOUTL+
SCF
AOUTL-
AOUTR+
AOU TR-
Control Register Clock Divider
CSN
CCLK
CDTI
P/S
MCLK CKS0
CKS1 CKS2 VREFH VREFL
M0039-E-01 2000/5
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ASAHI KASEI [AK4393]
n Ordering Guide
AK4393VF -40 ~ +85 °C 28pin VSOP (0.65mm pitch)
AKD4393 Evaluation Board
n
n Pin Layout
nn
DVSS
DVDD
MCLK
PDN
BICK
SDATA
LRCK 7
SMUTE/CSN 8
DFS
DEM0/CCLK
DEM1/CDTI 11
DIF0 12
DIF1
10
13
1
2
3
4
5
6
Top
View
9
28
27
26
25
24
23
22
21
20
19
18
17
16
CKS2
CKS1
CKS0
P/S
VCOM
AOUTL
AOUTL-
AOUTR+
AOUTR-
AVSS
AVDD
VREFH
VREFL
+
DIF2
14
15
BVSS
M0039-E-01 2000/5
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ASAHI KASEI [AK4393]
PIN/FUNCTION
No. Pin Name I/O Function
1 DVSS - Digital Ground Pin
2 DVDD - Digital Power Supply Pin, 3.3V or 5.0V
3 MCLK I Master Clock Input Pin
PDN I Power-Down Mode Pin
4
BICK I Audio Serial Data Clock Pin
5
SDATA I Audio Serial Data Input Pin
6
7 LRCK I L/R Clock Pin
SMUTE I Soft Mute Pin in parallel mode
8
CSN I Chip Select Pin in serial mode
DFS I Double Speed Sampling Mode Pin (Internal pull-down pin)
9
DEM0 I De-emphasis Enable Pin in parallel mode
10
CCLK I Control Data Clock Pin in serial mode
DEM1 I De-emphasis Enable Pin in parallel mode
11
CDTI I Control Data Input Pin in serial mode
12 DIF0 I Digital Input Format Pin
13 DIF1 I Digital Input Format Pin
14 DIF2 I Digital Input Format Pin
15 BVSS - Sub strate Ground Pin, 0V
16 VREFL I Low Level Voltage Reference Input Pin
17 VREFH I High Level Voltage Reference Input Pin
18 AVDD - Analog Power Supply Pin, 5.0V
19 AVSS - Analog Ground Pin, 0V
20 AOUTR- O Rch Negative analog output Pin
21 AOUTR+ O Rch Positive analog output Pin
22 AOUTL- O Lch Negative analog output Pin
23 AOUTL+ O Lch Positive analog output Pin
24 VCOM O Common Voltage Output Pin, 2.6V
25 P/S I Parallel/Serial Select Pin (Internal pull-up pin)
26 CKS0 I Master Clock Select Pin
27 CKS1 I Master Clock Select Pin
28 CKS2 I Master Clock Select Pin
When at “L”, the AK4393 is in power-down mode and is held in reset.
The AK4393 should always be reset upon power-up.
The clock of 64fs or more than is recommended to be input on this pin.
2’s complement MSB-first data is input on this pin.
When this pin goes "H", soft mute cycle is initiated.
When returning “L”, the output mute releases.
“L”: Normal Speed , “H”: Double Speed
“L”: Serial control mode, “H”: Parallel control mode
Note: All input pins except internal pull-up/down pins should not b e left floating.
M0039-E-01 2000/5
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ASAHI KASEI [AK4393]
ABSOLUTE MAXI MUM RATINGS
(AVSS, BVSS, DVSS = 0V; Note 1)
Parameter Symbol min max Units
Power Supplies: Analog
Digital
| BVSS-DVSS | (Note 2)
Input Current , Any pin Except Supplies IIN Input Voltage VIND -0.3 DVDD+0.3 V
Ambient Operating Temperature Ta -40 85
Storage Temperature Tstg -65 150
Notes: 1. All voltages with respect to ground.
2. AVSS, BVSS and DVSS must be connected to the same analog ground plane.
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
AVDD
DVDD
GND
D
-0.3
-0.3
-
6.0
6.0
0.3
±
10
V
V
V
mA
C
°
C
°
RECOMMENDED OPERATING CONDITIONS
(AVSS, BVSS, DVSS=0V; Note 1)
Parameter Symbol min typ max Units
Power Supplies:
(Note 3)
Voltage Reference
(Note 4)
Notes: 3. The power up sequence between AVDD and DVDD is not critical.
4. Analog output voltage scales with the voltage of (VREFH-VREFL).
AOUT (typ.@0dB) = (AOUT+) - (AOUT-) = ±2.4Vpp×(VREFH-VREFL)/5.
Analog
Digital
“H” voltage reference
“L” voltage refer ence
VREFH-VREFL
AVDD
DVDD
VREFH
VREFL
VREF
D
4.75
3.0
AVDD-0.5
AVSS
3.0
5.0
3.3
5.25
5.25
-
-
-
AVDD
-
AVDD
V
V
V
V
V
* AKM assumes no responsibility for the usage beyond the conditions in this data sheet.
M0039-E-01 2000/5
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ASAHI KASEI [AK4393]
ANALOG CHARACTERISTICS
(Ta = 25°C; AVDD = 5V, DVDD = 3.3V; AVSS, BVSS, DVSS = 0V, VREFH = AVDD, VREFL = AVSS;
fs = 44.1kHz; BICK = 64fs; Signal Frequency = 1kHz; 24bit Input Data; Measurement Bandwidth = 20Hz~20kHz;
600W; External circuit: Figure 11; unless otherwise specified)
R
³
L
Parameter min typ max Units
Resolution 24 Bits
Dynamic Characteristics (Note 5)
THD+N
fs=44.1kHz
BW=20kHz
fs=96kHz
BW=40kHz
Dynamic Range
(-60dBFS with A-weighted)
S/N (A-weighted
fs=44.1kHz (Note 6)
(Note 7)
fs=96kHz
(Note 7)
fs=44.1kHz (Note 8)
(Note 7)
fs=96kHz
(Note 7)
0dBFS
-60dBFS
0dBFS
-60dBFS
112
-
111
-
112
-
111
-
-100
-53
-97
-51
117
120
116
118
117
120
116
118
-90
-86
dB
-
dB
dB
-
dB
dB
dB
dB
dB
dB
dB
dB
dB
Interchannel Isolation (1kHz) 100 120 dB
DC Accuracy
Interchannel Gain Mismatch 0.15 0.3 dB
Gain Drift (Note 9) 20 - ppm/°C
Output Voltage (Note 10)
Load Resistance (Note 11) 600
±
2.25
2.4
±
2.55 Vpp
±
W
Output Current 3.5 mA
Power Supplies
Power Supply Current
Normal Operation (PDN = “H”)
AVDD
DVDD(fs=44.1kHz)
DVDD(fs=96kHz)
AVDD + DVDD
60
3
5
-
-
90
mA
mA
mA
mA
Power-Down Mode (PDN = “L”)
AVDD + DVDD (Note 12) 10 50 µA
Power Supply Rejection (Note 13) 50 dB
Notes: 5. At 44.1kHz, measured by Audio Precision, System Two. Averaging mode.
At 96kHz, measured by ROHDE & SCHWARZ, UPD. Averaging mode.
Refer to the eva board manual.
6. 101dB at 16bit data and 116dB at 20bit data.
7. By Figure12. External LPF Circuit Example 2.
8. S/N does not depend on input bit length.
9. The voltage on (VREFH-VREFL) is held +5V externally.
10. Full-scale voltage (0dB). Output voltage scales with the voltage of (VREFH-VREFL).
AOUT (typ.@0dB) = (AOUT+) - (AOUT-) = ±2.4Vpp×(VREFH-VREFL)/5.
11. For AC-load. 1kW for DC-load.
12. In the power-down mode. P/S = DVDD, and all other digital input pins including clock pins (MCLK, BICK and
LRCK) are held DVSS.
13. PSR is applied to AVDD, DVDD with 1kHz, 100mVpp. VREFH pin is held +5V.
M0039-E-01 2000/5
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ASAHI KASEI [AK4393]
FILTER CHARA CTERISTICS (fs = 44.1kHz)
(Ta = 25°C; AVDD = 4.75~5.25V; DVDD = 3.0~5.25V; fs = 44.1kHz; Normal Speed Mode; DEM = OFF)
Parameter Symbol min typ max Units
Digital Filter
Passband ±0.01dB (Note 14)
-6.0dB
Stopband (Note 14) SB 24.1 kHz
Passband Ripple PR
Stopband Attenuation SA 75 dB
Group Delay (Note 15) GD - 28 - 1/fs
Digital Filter + SCF
Frequency Response 0 ~ 20.0kHz -
Note: 14. The passband and stopband frequencies scale with fs.
For example, PB = 0.4535×fs (@±0.01dB), SB = 0.546×fs.
15. The calculating delay time which occurred by digital filtering. This time is from setting the 16/20/24bit data of
both channels to input register to the output of analog signal.
PB 0
- 22.05
0.2 - dB
±
20.0
-
0.005 dB
±
kHz
kHz
FILTER CHARACTERISTICS (fs = 96kHz)
(Ta = 25°C; AVDD = 4.75~5.25V; DVDD = 3.0~5.25V; fs = 96kHz; Double Speed Mode; DEM = OFF)
Parameter Symbol min typ max Units
Digital Filter
Passband ±0.01dB (Note 14)
-6.0dB
Stopband (Note 14) SB 52.5 kHz
Passband Ripple PR
Stopband Attenuation SA 75 dB
Group Delay (Note 15) GD - 28 - 1/fs
Digital Filter + SCF
Frequency Response 0 ~ 40.0kHz -
PB 0
- 48.0
0.3 - dB
±
43.5
-
0.005 dB
±
kHz
kHz
DC CHARACTERISTICS
(Ta = 25°C; AVDD = 4.75~5.25V; DVDD = 3.0~5.25V)
Parameter Symbol min typ max Units
High-Level Input Voltage
Low-Level Input Voltage
Input Leakage Current (Note 16) Iin - -
Note: 16. DFS and P/S pins have internal pull-down or pull-up devices, nominally 100kW.
M0039-E-01 2000/5
VIH
VIL
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70%DVDD
-
-
-
-
30%DVDD
10
±
V
V
µA
ASAHI KASEI [AK4393]
SWITCHING CHARACTERISTICS
(Ta = 25°C; AVDD = 4.75~5.25V; DVDD = 3.0~5.25V; CL = 20pF)
Parameter Symbol min typ max Units
Master Clock Timing
Normal Speed: 256fs, Double Speed: 128fs
Pulse Width Low
Pulse Width High
Normal Speed: 384fs, Double Speed: 192fs
Pulse Width Low
Pulse Width High
Normal Speed: 512fs, Double Speed: 256fs
Normal Speed: 768fs, Double Speed: 384fs
Pulse Width Low
Pulse Width High
LRCK Frequency (Note 17)
Normal Speed Mode (DFS = “L”)
Double Speed Mode (DFS = “H”)
Duty Cycle
Serial Interface Timing
BICK Period
BICK Pulse Width Low
Pulse Width High
BICK “” to LRCK Edge (Note 18)
LRCK Edge to BICK “” (Note 18)
SDATA Hold Time
SDATA Setup Time
Control Interface Timing
CCLK Period
CCLK Pulse Width Low
Pulse Width High
CDTI Setup Time
CDTI Hold Time
CSN High Time
CSN “¯” to CCLK “”
CCLK “” to CSN “”
Reset Timing
PDN Pulse Width (Note 19) tP W 150 ns
Notes: 17. When the normal and double speed modes are switched, AK4393 should be reset by PDN pin or RSTN bit.
18. BICK rising edge must not occur at the same time as LRCK edge.
19. The AK4393 can be reset by bringing PDN “L” to “H”.
When the states of CKS2-0 or DFS change, the AK4393 should be reset by PDN pin or RSTN bit.
fCLK
tCLKL
tCLKH
fCLK
tCLKL
tCLKH
fCLK
fCLK
tCLKL
tCLKH
fsn
fsd
Duty
tBCK
tBCKL
tBCKH
tBLR
tLRB
tSDH
tSDS
tCCK
tCCKL
tCCKH
tCDS
tCDH
tCSW
tCSS
tCSH
7.7
28
28
11.5
20
20
15.4
23.0
7
7
30
60
45
140
60
60
20
20
20
20
200
80
80
50
50
150
50
50
44.1
88.2
13.824 MHz
ns
ns
20.736 MHz
ns
ns
27.648
41.472
54
108
55
MHz
MHz
ns
ns
kHz
kHz
%
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
M0039-E-01 2000/5
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