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AK4688 Datasheet(PDF) 8 Page - Asahi Kasei Microsystems

Part # AK4688
Description  Asynchronous Stereo CODEC with Capless Line I/O
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Manufacturer  AKM [Asahi Kasei Microsystems]
Direct Link  http://www.akm.com
Logo AKM - Asahi Kasei Microsystems

AK4688 Datasheet(HTML) 8 Page - Asahi Kasei Microsystems

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[AK4688]
MS1420-J-00
2012/05
- 8 -
Power Supplies
Parameter
min
typ
max
Unit
Power Supply Current
Normal Operation (PDN1 pin = PDN2 pin = “H”)
AVVD1
AVDD2
DVDD
DVDD+AVDD1+AVDD2
Power-Down Mode (PDN1 pin = PDN2 pin = “L”; Note 7)
DVDD+AVDD1+AVDD2
3
11
13
27
1
-
-
-
40
20
mA
mA
mA
mA
μA
Note 7. PDN1-2, TEST1-2 pins を DVSS に、その他のクロックを含む全てのディジタル入力ピン(MCLK1-2,
BICK1-2, LRCK1-2, SDTI, SDA, SCL, MSN, CAD0 pins)を DVDD または DVSS に固定した場合の値です。
ただし
MSN pin を DVDD に固定した場合 LRCK1, BICK1 pin は出力状態になりますのでオープンにし
て下さい。
フィルタ特性
(Ta=25
°C; AVDD1=AVDD2 = DVDD= 3.3V; fs=48kHz)
Parameter
Symbol
min
typ
max
Unit
ADC Digital Filter (Decimation LPF):
Passband
(Note 8)
±0.1dB
-0.2dB
-3.0dB
PB
0
-
-
21.1
21.7
18.8
-
-
kHz
kHz
kHz
Stopband
SB
28.5
kHz
Stopband Attenuation
SA
73
dB
Group Delay
(Note 10)
GD
17
1/fs
Group Delay Distortion
ΔGD
0
µs
ADC Digital Filter (HPF):
Frequency Response (Note 8)
-3dB
-0.1dB
FR
1.0
7.1
Hz
Hz
DAC Digital Filter:
Passband
±0.05dB (Note 9)
-6.0dB
PB
0
-
24.0
21.7
-
kHz
kHz
Stopband (Note 9)
SB
26.3
kHz
Passband Ripple
PR
± 0.05
dB
Stopband Attenuation
SA
64
dB
Group Delay (Note 10)
GD
-
24
-
1/fs
De-emphasis Filter (DEM = ON)
De-emphasis Error
(DC基準)
fs = 32kHz
fs = 44.1kHz
fs = 48kHz
-
-
-
-
-
-
–1.5/0
–0.2/+0.2
0/+0.6
dB
dB
dB
DAC Digital Filter + Analog Filter: (DEM = OFF)
Frequency Response
20.0kHz
40.0kHz
80.0kHz
fs=44.1kHz
fs=96kHz
fs=192kHz
FR
FR
FR
-
-
-
± 0.2
± 0.3
± 1.0
-
-
-
dB
dB
dB
Note 8. 通過域と阻止域はfsに比例します。例えば、-0.1dBでの21.8kHzは0.454 x fs(DAC)です。基準周波数は1kHz
です。
Note 9. 通過域、阻止域の周波数は fs (システムサンプリングレート) に比例し、
PB=0.4535×fs(@
±0.05dB)、SB=0.546×fs です。
Note 10. ディジタルフィルタによる演算遅延で、アナログ信号が入力されてから両チャネルの24ビットデータがPORT1
の出力レジスタにセットされるまでの時間です。
DACについては、両チャネルの16/24ビットデータがPORT2の
入力レジスタにセットされてからアナログ信号が出力されるまでの時間です。


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