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AK5558 Datasheet, PDF (12/70 Pages) Asahi Kasei Microsystems – 8-Channel Differential 32-bit ADC | |||
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[AK5558]
â ADC Filter Characteristics (fs= 96 kHz)
(Ta= ï40 - +105 ï°C; AVDD= 4.5-5.5 V, TVDD=1.7-1.98 V (LDOE pin=âLâ) or 3.0-3.6 V (LDOE pin=âHâ),
VDD18= 1.7-1.98 V (LDOE pin= âLâ))
Parameter
Symbol
Min.
Typ.
Max.
Unit
Digital Filter (Decimation LPF): SHARP ROLL-OFF (Figure 7)
(SD pin= âLâ, SLOW pin= âLâ)
Passband (Note 13) +0.001/ï0.06 dB
ï6.0 dB
PB
0
-
-
44.1
kHz
48.8
-
kHz
Stopband (Note 13)
SB
55.7
-
-
kHz
Stopband Attenuation
SA
85
-
-
dB
Group Delay Distortion 0 - 40.0 kHz
ïGD
-
0
-
1/fs
Group Delay (Note 14)
GD
-
19
-
1/fs
Digital Filter (Decimation LPF): SLOW ROLL-OFF (Figure 8)
(SD pin= âLâ, SLOW pin= âHâ)
Passband (Note 13) +0.001/ï0.076 dB
ï6.0 dB
PB
0
-
-
43.8
25
kHz
kHz
Stopband (Note 13)
SB
73
-
-
kHz
Stopband Attenuation
SA
85
-
-
dB
Group Delay Distortion 0 - 40.0 kHz
ïGD
-
0
-
1/fs
Group Delay (Note 14)
GD
-
7
-
1/fs
Digital Filter (Decimation LPF): SHORT DELAY SHARP ROLL-OFF (Figure 9)
(SD pin= âHâ,SLOW pin= âLâ)
Passband (Note 13) +0.001/ï0.06 dB
PB
0
-
44.1
kHz
ï6.0 dB
-
48.8
-
kHz
Stopband (Note 13)
SB
55.7
-
-
kHz
Stopband Attenuation
SA
85
-
-
dB
Group Delay Distortion 0 - 40.0 kHz
ïGD
-
-
2.8
1/fs
Group Delay (Note 14)
GD
-
5
-
1/fs
Digital Filter (Decimation LPF): SHORT DELAY SLOW ROLL-OFF (Figure 10)
(SD pin=âHâ, SLOW pin= âHâ)
Passband (Note 13) +0.001/ï0.076 dB PB
0
-
25
kHz
ï6.0dB
-
43.8
-
kHz
Stopband (Note 13)
SB
73
-
-
kHz
Stopband Attenuation
SA
85
-
-
dB
Group Delay Distortion 0 - 40.0 kHz
ïGD
-
-
1.2
1/fs
Group Delay (Note 14)
GD
-
5
-
1/fs
Digital Filter (HPF):
Frequency Response
ï3.0 dB
FR
-
1.0
-
Hz
ï0.5 dB
-
2.5
-
Hz
(Note 13)
ï0.1 dB
-
6.5
-
Hz
Note 13. The Passband and Stopband Frequencies scale with fs.
For example, PB (+0.001 dB/ï0.06 dB) = 0.46 ï´ fs (SHARP ROLL-OFF).
For example, PB (+0.001 dB/ï0.076 dB) = 0.26 ï´ 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.
015099850-E-00
- 12 -
2016/03
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