[AK4492]
■ Sharp Roll-Off Filter Characteristics
Sharp Roll-Off Filter Characteristics (fs=44.1kHz)
(Ta = -40~85 C; VDDL/R = 4.755.25 V, AVDD = TVDD = (DVDD) 3.6 V, DVDD = 1.7 ~ 1.98 V; Normal
Speed Mode; DEM = OFF; SD bit or SD pin = “0”, SLOW bit or SLOW pin = “0”, SSLOW bit or SSLOW pin
=“0”)
Parameter
Digital Filter
Frequency
Response
Passband
Stopband
Passband Ripple
Stopband Attenuation
Group Delay
Digital Filter + SCF (Note 26)
Frequency Response: 0 20.0 kHz
Symbol
Min.
Typ.
Max.
Unit
0.01 dB
6.0 dB (Note 26)
(Note 27)
-
-
0
-
0
20.0
-
20.0
kHz
kHz
kHz
kHz
dB
22.05
PB
SB
PR
SA
GD
(Note 27)
(Note 28)
(Note 26)
(Note 29)
24.1
0.005
100
-
dB
1/fs
29.2
-
-
-0.7
+0.1
dB
Sharp Roll-Off Filter Characteristics (fs=96kHz)
(Ta = -40 ~ 85 C; VDDL/R = 4.755.25 V, AVDD = TVDD = (DVDD) 3.6V, DVDD = 1.7~1.98V; Double
Speed Mode; DEM = OFF; SD bit or SD pin = “0”, SLOW bit or SLOW pin = “0”, SSLOW bit or SSLOW pin
= “0”)
Parameter
Digital Filter
Frequency
Response
Passband
Stopband
Passband Ripple
Stopband Attenuation
Group Delay
Digital Filter + SCF (Note 26)
Frequency Response: 0 40.0 kHz
Symbol
Min.
Typ.
Max.
Unit
0.01dB
6.0 dB (Note 26)
(Note 27)
-
-
0
-
0
43.5
-
43.5
kHz
kHz
kHz
kHz
dB
48.0
PB
SB
PR
SA
GD
(Note 27)
(Note 28)
(Note 26)
(Note 29)
52.5
0.005
100
-
dB
1/fs
29.2
-
-
-1.9
+0.1
dB
Sharp Roll-Off Filter Characteristics (fs=192kHz)
(Ta = -40 ~ 85 C; VDDL/R = 4.755.25 V, AVDD = TVDD = (DVDD) 3.6 V, DVDD = 1.7~1.98 V; Quad
Speed Mode; DEM = OFF; SD bit or SD pin = “0”, SLOW bit or SLOW pin = “0”, SSLOW bit or SSLOW pin
= “0”)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Digital Filter
Frequency
Responce
Passband
Stopband
Passband Ripple
Stopband Attenuation
Group Delay
Digital Filter + SCF (Note 26)
0.01 dB
6.0 dB (Note 26)
(Note 27)
-
-
0
-
0
87.0
-
87.0
kHz
kHz
kHz
kHz
dB
96.0
PB
SB
PR
SA
GD
(Note 27)
(Note 28)
(Note 26)
(Note 29)
104.9
0.005
100
-
dB
1/fs
29.2
-
-
Frequency Response: 0 80.0kHz
-5.0
+0.1
dB
Note 26. Frequency response refers to the output level (0dB) of a 1kHz, 0dB sine wave input.
Note 27. The passband and stopband frequencies scale with fs. For example, PB=0.4535×fs (@0.01dB),
SB=0.546×fs.
Note 28. The first stage of the Interpolator. This is a passband gain amplitude of the 4 times oversampling
filter.
Note 29. The calculating delay time which occurred by digital filtering. This time is from setting the
16/20/24/32 bit data of both channels to the output of analog signal.
016011073-E-00
2016/12
- 15 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
