AK5536 Datasheet, PDF (10/69 Pages) Asahi Kasei Microsystems – 6-Channel Differential 32-bit  ADC

[AK5536]
9. Filter Characteristics
■ ADC Filter Characteristics (fs= 48 kHz)
(Ta= 40 - +105C; AVDD= 3.0-3.6 V, TVDD=1.7-1.98 V (LDOE pin=“L”) or 3.0-3.6 V (LDOE pin=“H”),
VDD18= 1.7-1.98 V (LDOE pin= “L”))
Parameter
Symbol
Min.
Typ.
Max.
Unit
Digital Filter (Decimation LPF): SHARP ROLL-OFF (Figure 3)
(SD pin= “L”, SLOW pin= “L”)
Passband (Note 13) +0.001/0.06 dB
PB
6.0 dB
Stopband (Note 13)
SB
0
-
22.0
kHz
-
24.4
-
kHz
27.9
-
-
kHz
Stopband Attenuation
SA
85
-
-
dB
Group Delay Distortion 0 - 20.0 kHz
GD
-
Group Delay (Note 14)
GD
-
0
-
1/fs
19
-
1/fs
Digital Filter (Decimation LPF): SLOW ROLL-OFF (Figure 4)
(SD pin= “L”, SLOW pin= “H”)
Passband (Note 13) +0.001/0.076 dB
PB
6.0 dB
0
-
12.5
kHz
-
21.9
-
kHz
Stopband (Note 13)
SB
36.5
-
-
kHz
Stopband Attenuation
SA
85
-
-
dB
Group Delay Distortion 0 - 20.0 kHz
GD
-
0
-
1/fs
Group Delay (Note 14)
GD
-
7
-
1/fs
Digital Filter (Decimation LPF): SHORT DELAY SHARP ROLL-OFF FILTER (Figure 5)
(SD pin= “H”, SLOW pin= “L”)
Passband (Note 13) +0.001/0.06 dB
PB
0
-
22.0
kHz
6.0 dB
-
24.4
-
kHz
Stopband (Note 13)
SB
27.9
-
-
kHz
Stopband Attenuation
SA
85
-
-
dB
Group Delay Distortion 0 - 20.0 kHz
GD
-
-
2.8
1/fs
Group Delay (Note 14)
GD
-
5
-
1/fs
Digital Filter (Decimation LPF): SHORT DELAY SLOW ROLL-OFF (Figure 6)
(SD pin= “H”,SLOW pin= “H”)
Passband (Note 13) +0.001/0.076 dB
PB
6.0 dB
0
-
12.5
kHz
-
21.9
-
kHz
Stopband (Note 13)
SB
36.5
-
-
kHz
Stopband Attenuation
SA
85
-
-
dB
Group Delay Distortion 0 - 20.0 kHz
GD
-
-
1.2
1/fs
Group Delay (Note 14)
GD
-
5
-
1/fs
Digital Filter (HPF):
Frequency Response
3.0 dB
FR
-
1.0
-
Hz
0.5 dB
-
2.5
-
Hz
(Note 13)
0.1 dB
-
6.5
-
Hz
Note 13. The Passband and Stopband Frequencies scale with fs.
For Example, PB (+0.001 dB/0.06 dB) = 0.46  fs (SHARP ROLL-OFF).
For Example, PB (+0.001 dB/0.076 dB) = 0.26  fs (SLOW ROLL-OFF).
Note 14. The calculated delay time induced by digital filtering. This time is from the input of an analog
signal to the L channel MSB output timing of the SDTO. It may have an error of +1[1/fs] at
maximum when outputting data via audio interfaces.
015099885-E-00
- 10 -
2016/03