AKM AK4395 Datasheet
ASAHI KASEI [AK4395]
A
MCLK
AK4395
Advanced Multi-Bit 192kHz 24-Bit ∆Σ DAC
GENERAL DESCRIPTION
The AK4395 is a high performance stereo DAC for the 192kHz sampling mode of DVD-Audio including a
24bit digital filter. The digital filter has high stopband attenuation with 110dB or more that reduces wide
band aliasing noise. The AK4395 introduces the advanced multi-bit system for ∆Σ modulator. This new
architecture achieves the wider dynamic range, while keeping much the same superior distortion
characteristics as conventional Single-Bit way. The analog outputs are filtered in the analog domain by
switched-capacitor filter (SCF) with high tolerance to clock jitter. The AK4395 also includes digital
volume, so the device is suitable for multi-channel audio system.
FEATURES
• 128x Oversampling
• Sampling Rate up to 192kHz
• High Performance 24Bit 8x Digital Filter (Slow Roll-off Option)
Ripple: ±0.0002dB, Attenuation: 110dB
• High Tolerance to Clock Jitter
• Low Distortion Differential Output
• Digital de-emphasis for 32, 44.1 & 48kHz sampling
• Channel Independent Digital Volume with Soft-transition
• Soft Mute
• THD+N: -100dB
• DR, S/N: 120dB
• I/F format: MSB justified, 16/20/24bit LSB justified, I
• Master Clock: Normal Speed: 256fs, 384fs, 512fs or 768fs
Double Speed: 128fs, 192fs, 256fs or 384fs
Quad Speed: 128fs or 192fs
• Power Supply: 5V±5%
• TTL Level Digital I/F
• Small Package: 28pin VSOP
•
Pin Compatible with AK4393/4
2
S
LRCK
BICK
SDAT
SMUTE
PDN
CAD0
CAD1
DIF2DIF1DIF0
Audio Data
Interface
De-emphasis
DATT, Soft Mute
De-emphasis
DATT, Soft Mute
Control Register
CSN
CCLK
CDTI
8x
Interpolator
8x
Interpolator
P/S
DEM0DVDD
De-emphasis
Control
Modulator
Modulator
Clock Divider
DEM1
∆Σ
∆Σ
VREFH VREFL
AVDD
SCF
SCF
AVSSDVSS
BVSS
VCOM
DZFL
AOUTL+
AOUTL-
AOUTR+
AOUTR-
DZFR
MS0040-E-00 2000/7
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ASAHI KASEI [AK4395]
n Ordering Guide
AK4395VF -10 ~ +70 °C 28pin VSOP (0.65mm pitch)
AKD4395 Evaluation Board
n
Pin Layout
DVSS
DVDD
MCLK
PDN
BICK
SDATA
LRCK 7
SMUTE/CSN 8
CAD0
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
DZFR
CAD1
DZFL
P/S
VCOM
AOUTL+
AOUTL-
AOUTR+
AOUTR-
AVSS
AVDD
VREFH
VREFL
DIF2
n
Compatibility with AK4393/4
14
15
BVSS
AK4395 AK4394 AK4393
fs (max) 216kHz 216kHz 108kHz
DVDD 4.75~5.25V 4.75~5.25V 3~5.25V
Digital Filter Stopband Attenuation 110dB 75dB 75dB
Digital Volume 256 levels, 0.5dB N/A N/A
µP I/F Address Pin CAD0/CAD1 N/A N/A
De-emphasis filter 32k,44.1k,48k 32k,44.1k,48k,96k 32k,44.1k,48k,96k
Optional Filter Slow Roll-off Slow Roll-off N/A
Zero Detection Pin DZFL/DZFR DZFL/DZFR N/A
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ASAHI KASEI [AK4395]
PIN/FUNCTION
No. Pin Name I/O Function
1 DVSS - Digital Ground Pin
2 DVDD - Digital Power Supply Pin, 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
DFS0 I Sampling Speed Mode Select Pin in parallel mode (Internal pull-down pin)
9
CAD0 I Chip Address 0 Pin in serial mode (Internal pull-down pin)
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 - Substrate 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)
CKS0 I Master Clock Select Pin in parallel mode
26
DZFL O Lch Zero Input Detect Pin in serial mode
CKS1 I Master Clock Select Pin in parallel mode (Internal pull-down pin)27
CAD1 I Chip Address 1 Pin in serial mode (Internal pull-down pin)
ACKS I Master Clock Auto Setting Mode Pin in parallel mode
28
DZFR O Rch Zero Input Detect Pin in serial mode
When at “L”, the AK4395 is in power-down mode and is held in reset.
The AK4395 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 be left floating.
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ASAHI KASEI [AK4395]
ABSOLUTE MAXIMUM 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 -10 70
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
-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 reference
VREFH-VREFL
AVDD
DVDD
VREFH
VREFL
∆ VREF
4.75
4.75
AVDD-0.5
AVSS
3.0
5.0
5.0
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.
MS0040-E-00 2000/7
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ASAHI KASEI [AK4395]
ANALOG CHARACTERISTICS
(Ta = 25°C; AVDD, DVDD = 5V; AVSS, BVSS, DVSS = 0V, VREFH = AVDD, VREFL = AVSS;
fs = 44.1kHz; BICK = 64fs; Signal Frequency = 1kHz; 24bit Input Data; Measurement Bandwidth = 20Hz~20kHz;
≥ 600Ω; External circuit: Figure 12; unless otherwise specified)
R
L
Parameter min typ max Units
Resolution 24 Bits
Dynamic Characteristics (Note 5)
THD+N
fs=44.1kHz
BW=20kHz
fs=96kHz
BW=40kHz
fs=192kHz
BW=40kHz
Dynamic Range (-60dBFS with A-weighted) (Note 6)
(Note 7)
S/N (A-weighted) (Note 8)
(Note 7)
0dBFS
-60dBFS
0dBFS
-60dBFS
0dBFS
-60dBFS
112
-
112
-
-100
-53
-97
-51
-97
-51
117
120
117
120
-90
-87
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) ±2.25 ±2.4 ±2.55 Vpp
Load Resistance (Note 11) 600 Ω
Output Current 3.5 mA
Power Supplies
Power Supply Current
Normal Operation (PDN = “H”)
AVDD
DVDD(fs=44.1kHz)
DVDD(fs=96kHz)
DVDD(fs=192kHz)
AVDD + DVDD
60
10
17
-
7
-
-
-
110
mA
mA
mA
mA
mA
Power-Down Mode (PDN = “L”)
AVDD + DVDD (Note 12) 10 100 µA
Power Supply Rejection (Note 13) 50 dB
Notes: 5. At 44.1kHz, measured by Audio Precision, System Two. Averaging mode.
At 96kHz and 192kHz, measured by ROHDE & SCHWARZ, UPD. Averaging mode.
Refer to the evaluation board manual.
6. 101dB at 16bit data and 116dB at 20bit data.
7. By Figure13. 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. 1kΩ 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.
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ASAHI KASEI [AK4395]
SHARP ROLL-OFF FILTER CHARACTERISTICS (fs = 44.1kHz)
(Ta = 25°C; AVDD, DVDD = 4.75~5.25V; fs = 44.1kHz; Normal Speed Mode; DEM = OFF; SLOW = “0”)
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 ± 0.0002 dB
Stopband Attenuation SA 110 dB
Group Delay (Note 15) GD - 43.5 - 1/fs
Digital Filter + SCF
Frequency Response 0 ∼ 20.0kHz - ± 0.1 - dB
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
20.0
-
kHz
kHz
SHARP ROLL-OFF FILTER CHARACTERISTICS (fs = 96kHz)
(Ta = 25°C; AVDD, DVDD = 4.75~5.25V; fs = 96kHz; Double Speed Mode; DEM = OFF; SLOW = “0”)
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 ± 0.0002 dB
Stopband Attenuation SA 110 dB
Group Delay (Note 15) GD - 43.5 - 1/fs
Digital Filter + SCF
Frequency Response 0 ∼ 40.0kHz - ± 0.2 - dB
PB 0
- 48.0
43.5
-
kHz
kHz
SHARP ROLL-OFF FILTER CHARACTERISTICS (fs = 192kHz)
(Ta = 25°C; AVDD, DVDD = 4.75~5.25V; fs = 192kHz; Quad Speed Mode; DEM = OFF; SLOW = “0”)
Parameter symbol min typ max Units
Digital Filter
Passband ±0.01dB (Note 14)
-6.0dB
Stopband (Note 14) SB 105 kHz
Passband Ripple PR ± 0.0002 dB
Stopband Attenuation SA 110 dB
Group Delay (Note 15) GD - 43.5 - 1/fs
Digital Filter + SCF
Frequency Response 0 ∼ 80.0kHz - +0/-0.5 - dB
MS0040-E-00 2000/7
PB 0
- 6 -
- 96.0
87.0
-
kHz
kHz
ASAHI KASEI [AK4395]
SLOW ROLL-OFF FILTER CHARACTERISTICS (fs = 44.1kHz)
(Ta = 25°C; AVDD, DVDD = 4.75~5.25V; fs = 44.1kHz; Normal Speed Mode; DEM = OFF; SLOW = “1”)
Parameter Symbol min typ max Units
Digital Filter
Passband ±0.04dB (Note 16)
-3.0dB
Stopband (Note 16) SB 39.2 kHz
Passband Ripple PR ± 0.005 dB
Stopband Attenuation SA 72 dB
Group Delay (Note 15) GD - 43.5 - 1/fs
Digital Filter + SCF
Frequency Response 0 ∼ 20.0kHz - +0/-5 - dB
Note: 16. The passband and stopband frequencies scale with fs.
For example, PB = 0.185×fs (@±0.04dB), SB = 0.888×fs.
PB 0
- 18.2
8.1
kHz
-
kHz
SLOW ROLL-OFF FILTER CHARACTERISTICS (fs = 96kHz)
(Ta = 25°C; AVDD, DVDD = 4.75~5.25V; fs = 96kHz; Double Speed Mode; DEM0 = OFF; SLOW = “1”)
Parameter Symbol min typ max Units
Digital Filter
Passband ±0.04dB (Note 16)
-3.0dB
Stopband (Note 16) SB 85.3 kHz
Passband Ripple PR ± 0.005 dB
Stopband Attenuation SA 72 dB
Group Delay (Note 15) GD - 43.5 - 1/fs
Digital Filter + SCF
Frequency Response 0 ∼ 40.0kHz - +0/-4 - dB
PB 0
- 39.6
17.7
-
kHz
kHz
SLOW ROLL-OFF FILTER CHARACTERISTICS (fs = 192kHz)
(Ta = 25°C; AVDD, DVDD = 4.75~5.25V; fs = 192kHz; Quad Speed Mode; DEM = OFF; SLOW = “1”)
Parameter Symbol min typ max Units
Digital Filter
Passband ±0.04dB (Note 16)
-3.0dB
Stopband (Note 16) SB 171 kHz
Passband Ripple PR ± 0.005 dB
Stopband Attenuation SA 72 dB
Group Delay (Note 15) GD - 43.5 - 1/fs
Digital Filter + SCF
Frequency Response 0 ∼ 80.0kHz - +0/-5 - dB
MS0040-E-00 2000/7
PB 0
- 7 -
- 79.1
35.5
-
kHz
kHz
ASAHI KASEI [AK4395]
DC CHARACTERISTICS
(Ta = 25°C; AVDD, DVDD = 4.75~5.25V)
Parameter Symbol min typ max Units
High-Level Input Voltage
Low-Level Input Voltage
High-Level Output Voltage (Iout = -100µA)
Low-Level Output Voltage (Iout = 100µA)
Input Leakage Current (Note 17) Iin - -
Note: 17. DFS0/CAD0, CKS1/CAD1 and P/S pins have internal pull-down or pull-up devices, nominally 100kΩ.
VIH
VIL
VOH
VOL
2.2
-
DVDD-0.5
-
-
-
-
-
-
0.8
-
0.5
± 10
V
V
V
V
µA
SWITCHING CHARACTERISTICS
(Ta = 25°C; AVDD, DVDD = 4.75~5.25V; CL = 20pF)
Parameter Symbol min typ max Units
Master Clock Timing
Frequency
Duty Cycle
LRCK Frequency (Note 18)
Normal Speed Mode
Double Speed Mode
Quad Speed Mode
Duty Cycle
Serial Interface Timing
BICK Period
Normal Speed Mode
Double Speed Mode
Quad Speed Mode
BICK Pulse Width Low
Pulse Width High
BICK “↑” to LRCK Edge (Note 19)
LRCK Edge to BICK “↑” (Note 19)
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 20) tPD 150 ns
Notes: 18. When the normal/double/quad speed modes are switched, AK4395 should be reset by PDN pin or RSTN bit.
19. BICK rising edge must not occur at the same time as LRCK edge.
20. The AK4395 can be reset by bringing PDN “L” to “H”.
When the states of CKS2-0 or DFS1-0 change, the AK4395 should be reset by PDN pin or RSTN bit.
fCLK
dCLK
fsn
fsd
fsq
Duty
tBCK
tBCK
tBCK
tBCKL
tBCKH
tBLR
tLRB
tSDH
tSDS
tCCK
tCCKL
tCCKH
tCDS
tCDH
tCSW
tCSS
tCSH
7.7
40
30
60
120
45
1/128fs
1/64fs
1/64fs
30
30
20
20
20
20
200
80
80
50
50
150
50
50
41.472
60
54
108
216
55
MHz
%
kHz
kHz
kHz
%
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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