AK4558EN Datasheet, PDF (15/94 Pages) Asahi Kasei Microsystems – 108dB 216kHz 32Bit CODEC with PLL

[AK4558]
11. ADC Filter Characteristics (fs=192kHz)
(Ta= -40  +105C; AVDD =2.4 3.6V, TVDD=1.6 1.98V, 2.4 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/-0.04dB
6.0dB
PB
0
-
83.7 kHz
100.1
kHz
Stopband (Note 13)
SB
122.9
-
-
kHz
Stopband Attenuation
SA
85
-
-
dB
Group Delay Distortion 0 ~ 40.0kHz
GD
-
0
-
1/fs
Group Delay (Note 14)
GD
-
15
-
1/fs
ADC Digital Filter (Decimation LPF): SHORT DELAY SHARP ROLL-OFF FILTER
(SLAD bit=“0” ; SDAD bit=“1”)
Passband (Note 13)
0dB/-0.04dB
6.0dB
PB
0
-
83.7 kHz
-
100.1
-
kHz
Stopband (Note 13)
SB
122.9
-
-
kHz
Stopband Attenuation
SA
85
-
dB
Group Delay Distortion 0 ~ 40.0kHz
GD
-
-
0.3
1/fs
Group Delay (Note 14)
GD
-
6.0
-
1/fs
ADC Digital Filter (Decimation LPF): SLOW ROLL-OFF
(SLAD bit=“1” ; SDAD bit=“0”)
Passband (Note 13)
Stopband (Note 13)
0dB/-0.1dB
6.0dB
PB
SB
0
-
145.9
-
75.2
-
31.1 kHz
-
kHz
kHz
Stopband Attenuation
SA
85
-
dB
Group Delay Distortion 0 ~ 40.0kHz
GD
-
0
-
1/fs
Group Delay (Note 14)
GD
-
8.0
-
1/fs
ADC Digital Filter (Decimation LPF): SHORT DELAY SLOW ROLL-OFF FILTER
(SLAD bit=“1” ; SDAD bit=“1”)
Passband (Note 13)
0dB/-0.1dB
6.0dB
PB
0
-
31.1 kHz
-
75.2
-
kHz
Stopband (Note 13)
SB
145.9
-
kHz
Stopband Attenuation
SA
85
-
dB
Group Delay Distortion 0 ~ 40.0kHz
GD
-
-
0.6
1/fs
Group Delay (Note 14)
GD
-
6.0
-
1/fs
ADC Digital Filter (HPF):
Frequency Response
3.0dB
FR
-
4.0
-
Hz
-
10.0
-
Hz
(Note 13)
0.1dB
-
26.0
-
Hz
Note 13. The passband and stopband frequencies scales with fs (sampling frequency).
For example, PB(0dB/-0.04dB) = 0.436 x fs (@fs=192kHz) for ADC block(SHARP ROLL-OFF).
For example, PB(0dB/-0.1dB) = 0.16 x fs (@fs=192kHz) 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
- 15 -
2015/09