AK4558EN Datasheet, PDF (14/94 Pages) Asahi Kasei Microsystems – 108dB 216kHz 32Bit CODEC with PLL

[AK4558]
10. ADC Filter Characteristics (fs=96kHz)
(Ta= -40  +105C; AVDD =2.4 3.6V, TVDD=1.7 3.6V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
ADC Digital Filter (Decimation LPF): SHARP ROLL-OFF
(SLAD bit=“0” ; SDAD bit=“0”)
Passband (Note 13) 0dB/-0.06dB
6.0dB
PB
0
-
44.2
kHz
48.7
kHz
Stopband (Note 13)
SB
55.6
-
-
kHz
Stopband Attenuation
SA
85
-
-
dB
Group Delay Distortion 0 ~ 40.0kHz
GD
-
0
-
1/fs
Group Delay (Note 14)
GD
-
19
-
1/fs
ADC Digital Filter (Decimation LPF): SHORT DELAY SHARP ROLL-OFF FILTER
(SLAD bit=“0” ; SDAD bit=“1”)
Passband (Note 13) 0dB/-0.06dB
6.0dB
PB
0
-
44.2
kHz
-
48.7
-
kHz
Stopband (Note 13)
SB
55.6
-
kHz
Stopband Attenuation
SA
85
-
dB
Group Delay Distortion 0 ~ 40.0kHz
GD
-
-
2.6
1/fs
Group Delay (Note 14)
GD
-
5.0
-
1/fs
ADC Digital Filter (Decimation LPF): SLOW ROLL-OFF
(SLAD bit=“1” ; SDAD bit=“0”)
Passband (Note 13) 0dB/-0.074dB
6.0dB
PB
0
-
25
kHz
-
43.7
kHz
Stopband (Note 13)
SB
73
-
-
kHz
Stopband Attenuation
SA
85
-
-
dB
Group Delay Distortion 0 ~ 40.0kHz
GD
-
0
-
1/fs
Group Delay (Note 14)
GD
-
7.0
-
1/fs
ADC Digital Filter (Decimation LPF): SHORT DELAY SLOW ROLL-OFF FILTER
(SLAD bit=“1” ; SDAD bit=“1”)
Passband (Note 13) 0dB/-0.074dB
6.0dB
PB
0
-
25
kHz
-
43.7
-
kHz
Stopband (Note 13)
SB
73
-
-
kHz
Stopband Attenuation
SA
85
-
dB
Group Delay Distortion 0 ~ 40.0kHz
GD
-
-
1.2
1/fs
Group Delay (Note 14)
GD
-
5.0
-
1/fs
ADC Digital Filter (HPF):
Frequency Response
3.0dB
FR
-
2.0
-
5.0
-
Hz
-
Hz
(Note 13)
0.1dB
-
13
-
Hz
Note 13. The passband and stopband frequencies scales with fs (sampling frequency).
For example, PB(0dB/-0.06dB) = 0.46 x fs (@fs=96kHz) for ADC block(SHARP ROLL-OFF).
For example, PB(0dB/-0.074dB) = 0.26 x fs (@fs=96kHz) for ADC block(SLOW ROLL-OFF).
Note 14. The calculated delay time by digital filtering. This is the time from the input of an analog signal to
the output of MSB for L channel of SDTO. The error of the delay at audio interface is within
+1[1/fs].
015004500-E-02
- 14 -
2015/09