AK4645AEZ Datasheet, PDF (12/85 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP

[AK4645A]
ϑΟϧλಛੑ
(Ta=25°C; AVDD=DVDD=2.6 ∼ 3.5V; TVDD=1.6 ∼ 3.5V; HVDD=2.6 ∼ 5.25V; fs=44.1kHz; DEM=OFF;
FIL1=FIL3=EQ=OFF)
Parameter
Symbol
min
typ
max
Units
ADC Digital Filter (Decimation LPF):
Passband (Note 26)
±0.16dB
PB
0
-
17.3
kHz
−0.66dB
-
19.4
-
kHz
−1.1dB
-
19.9
-
kHz
−6.9dB
-
22.1
-
kHz
Stopband
SB
26.1
-
-
kHz
Passband Ripple
PR
-
-
±0.1
dB
Stopband Attenuation
SA
73
-
-
dB
Group Delay (Note 27)
GD
-
19
-
1/fs
Group Delay Distortion
ΔGD
-
0
-
μs
ADC Digital Filter (HPF): (Note 28)
Frequency Response (Note 26) −3.0dB
FR
-
0.9
-
Hz
−0.5dB
-
2.7
-
Hz
−0.1dB
-
6.0
-
Hz
DAC Digital Filter (LPF):
Passband (Note 26)
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 27)
±0.1dB
PB
−0.7dB
−6.0dB
SB
PR
SA
GD
0
-
19.6
kHz
-
20.0
-
kHz
-
22.05
-
kHz
25.2
-
-
kHz
-
-
±0.01
dB
59
-
-
dB
-
25
-
1/fs
DAC Digital Filter (LPF) + SCF:
Frequency Response: 0 ∼ 20.0kHz
FR
-
±1.0
-
dB
DAC Digital Filter (HPF): (Note 28)
Frequency Response (Note 26) −3.0dB
FR
-
0.9
-
Hz
−0.5dB
-
2.7
-
Hz
−0.1dB
-
6.0
-
Hz
BOOST Filter: (Note 29)
Frequency Response MIN 20Hz
FR
-
5.76
-
dB
100Hz
-
2.92
-
dB
1kHz
-
0.02
-
dB
MID 20Hz
FR
-
10.80
-
dB
100Hz
-
6.84
-
dB
1kHz
-
0.13
-
dB
MAX 20Hz
FR
-
16.06
-
dB
100Hz
-
10.54
-
dB
1kHz
-
0.37
-
dB
Note 26. ֤ৼ෯ಛੑͷप೾਺͸ fs (γεςϜαϯϓϦϯάϨʔτ)ʹൺྫ͠·͢ɻ
ྫ͑͹ɺPB=20.0kHz(@−0.7dB)͸0.454 x fsͰ͢(DAC)ɻ֤Ԡ౴͸1kHzΛج४ʹ͠·͢ɻ
Note 27. σΟδλϧϑΟϧλʹΑΔ஗ԆԋࢉͰɺADC෦͸Ξφϩά৴߸͕ೖྗ͞Ε͔ͯΒ྆νϟωϧͷ16Ϗ
οτσʔλ͕ग़ྗϨδελʹηοτ͞ΕΔ·Ͱͷ࣌ؒͰ͢ɻ
DAC෦͸16Ϗοτσʔλ͕ೖྗϨδελʹηοτ͞Ε͔ͯΒΞφϩά৴߸͕ग़ྗ͞ΕΔ·Ͱͷ࣌ؒ
Ͱ͢ɻPMADL=PMADR bits = “0”ͷͱ͖DAC෦ͷGroup Delay͸25/fs(typ)Ͱ͢ɻ
Note 28. PMADL bit = “1” or PMADR bit = “1”ͷͱ͖ɺADCͷHPF͸ONɺDACͷHPF͸OFFͰ͢ɻ
PMADL=PMADR bits = “0”, PMDAC bit = “1”ͷͱ͖ɺDACͷHPF͸ONɺADCͷHPF͸OFFͰ͢ɻ
Note 29. प೾਺ಛੑ͸αϯϓϦϯάϨʔτʹൺྫ͠·͢ɻߴϨϕϧͷ௿प೾৴߸Λೖྗͨ͠৔߹ɺ௿ҬͰΫ
Ϧοϓ͠·͢ɻ
MS0986-J-00
- 12 -
2008/07