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PDF AK4385 Data sheet ( Hoja de datos )
| Número de pieza | AK4385 | |
| Descripción | 108dB 192kHz 24-Bit 2ch DAC | |
| Fabricantes | AKM | |
| Logotipo |  |
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[AK4385]
AK4385
108dB 192kHz 24-Bit 2ch ΔΣ DAC
GENERAL DESCRIPTION
The AK4385 offers the perfect mix for cost and performance based audio systems. Using AKM's multi bit
architecture for its modulator the AK4385 delivers a wide dynamic range while preserving linearity for
improved THD+N performance. The AK4385 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 applications including
DVD-Audio. The AK4385 is offered in a space saving 16pin TSSOP package.
FEATURES
Sampling Rate Ranging from 8kHz to 192kHz
128 times Oversampling (Normal Speed Mode)
64 times Oversampling (Double Speed Mode)
32 times Oversampling (Quad Speed Mode)
24-Bit 8 times FIR Digital Filter
On chip SCF
Digital de-emphasis for 32k, 44.1k and 48kHz sampling
Soft mute
Digital Attenuator (Linear 256 steps)
I/F format: 24-Bit MSB justified, 24/20/16-Bit LSB justified or I2S
Master clock: 256fs, 384fs, 512fs, 768fs or 1152fs (Normal Speed Mode)
128fs, 192fs, 256fs or 384fs (Double Speed Mode)
128fs, 192fs (Quad Speed Mode)
THD+N: -94dB
Dynamic Range: 108dB
High Tolerance to Clock Jitter
Power supply: 4.75 to 5.25V
Very Small Package: 16pin TSSOP (6.4mm x 5.0mm)
AK4381 Pin Compatible
MCLK
CSN
CCLK
CDTI
LRCK
BICK
SDTI
µP
Interface
De-emphasis
Control
Clock
Divider
Audio
Data
Interface
8X
Interpolator
8X
Interpolator
ΔΣ
Modulator
ΔΣ
Modulator
SCF
SCF
VDD
VSS
DZFL
DZFR
AOUTL+
AOUTL-
AOUTR+
AOUTR-
PDN
MS0246-E-02
-1-
2010/09
1 page  
[AK4385]
SHARP ROLL-OFF FILTER CHARACTERISTICS
(Ta = 25°C; VDD = 4.75 ∼ 5.25V; fs = 44.1kHz; DEM = OFF; SLOW = “0”)
Parameter
Symbol
min
typ
max Units
Digital filter
Passband
±0.05dB (Note 9)
-6.0dB
PB 0
20.0 kHz
- 22.05 - kHz
Stopband
(Note 9)
SB 24.1
kHz
Passband Ripple
PR
± 0.02
dB
Stopband Attenuation
SA 54
dB
Group Delay
Digital Filter + SCF
(Note 10)
GD - 19.3 - 1/fs
Frequency Response 20.0kHz fs=44.1kHz
40.0kHz fs=96kHz
80.0kHz fs=192kHz
FR
FR
FR
- ± 0.2 -
- ± 0.3 -
- +0.1/-0.6 -
dB
dB
dB
Notes: 9. The passband and stopband frequencies scale with fs(system sampling rate).
For example, PB=0.4535×fs (@±0.05dB), SB=0.546×fs.
10. The calculating delay time which occurred by digital filtering. This time is from setting the 16/24bit data
of both channels to input register to the output of analog signal.
SLOW ROLL-OFF FILTER CHARACTERISTICS
(Ta = 25°C; AVDD, DVDD = 4.75~5.25V; fs = 44.1kHz; DEM = OFF; SLOW = “1”)
Parameter
Digital Filter
Symbol
min
typ
Passband
±0.04dB (Note 11)
-3.0dB
PB 0
- 18.2
Stopband
(Note 11)
SB 39.2
Passband Ripple
PR
Stopband Attenuation
SA 72
Group Delay
Digital Filter + SCF
(Note 10)
GD -
19.3
Frequency Response 20.0kHz fs=44.kHz
40.0kHz fs=96kHz
80.0kHz fs=192kHz
FR
FR
FR
Note: 11. The passband and stopband frequencies scale with fs.
For example, PB = 0.185×fs (@±0.04dB), SB = 0.888×fs.
-
-
-
+0/-5
+0/-4
+0.1/-5
max
8.1
-
± 0.005
-
-
-
-
Units
kHz
kHz
kHz
dB
dB
1/fs
dB
dB
dB
DC CHARACTERISTICS
(Ta=25°C; VDD=4.75 ∼ 5.25V)
Parameter
Symbol
min
High-Level Input Voltage
VIH 2.2
Low-Level Input Voltage
VIL -
High-Level Output Voltage (Iout=-80µA)
Low-Level Output Voltage (Iout=80µA)
VOH
VOL
VDD-0.4
-
Input Leakage Current
Iin -
typ
-
-
-
-
max Units
-V
0.8 V
-V
0.4 V
± 10 µA
MS0246-E-02
-5-
2010/09
5 Page 
[AK4385]
LRCK
BICK
(32fs)
SDTI
Mode 0
BICK
(64fs)
SDTI
Mode 0
01
10 11 12 13 14 15 0 1
15 14
01
6 5 4 3 2 1 0 15 14
14 15 16 17
31 0 1
Don’t care
15 14
15:MSB, 0:LSB
Lch Data
0 Don’t care
10 11 12 13 14 15 0 1
6 5 4 3 2 1 0 15 14
14 15 16 17
31 0 1
15 14
0
Rch Data
Figure 1. Mode 0 Timing
LRCK
BICK
(64fs)
SDTI
Mode 1
SDTI
Mode 4
01
8 9 10 11 12
Don’t care
19:MSB, 0:LSB
19
Don’t care 23 22 21 20 19
23:MSB, 0:LSB
Lch Data
31 0 1
8 9 10 11 12
0 Don’t care
19
0 Don’t care 23 22 21 20 19
Rch Data
31 0 1
0
0
Figure 2. Mode 1,4 Timing
LRCK
BICK
(64fs)
SDTI
01
2
22 23 24
30 31 0 1
2
22 23 24
30 31 0 1
23 22
1 0 Don’t care
23:MSB, 0:LSB
Lch Data
23 22
Figure 3. Mode 2 Timing
1 0 Don’t care
Rch Data
23 22
MS0246-E-02
- 11 -
2010/09
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet AK4385.PDF ] | |
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