ASAHI KASEI
[AK4584]
FILTER CHARACTERISTICS
(Ta=−10 70°C; AVDD, DVDD, PVDD=4.75 5.25V; TVDD=2.7 5.25V; fs=44.1kHz; DEM=OFF)
Parameter
Symbol
min
typ
max
Units
ADC Digital Filter (Decimation LPF):
Passband
(Note 9)
±0.005dB
-0.02dB
-0.06dB
-6.0dB
PB
0
-
-
-
19.76
kHz
kHz
kHz
kHz
kHz
dB
20.02
20.20
22.05
-
-
-
Stopband
Passband Ripple
SB
PR
24.34
±0.005
Stopband Attenuation
Group Delay
Group Delay Distortion
ADC Digital Filter (HPF):
SA
GD
∆GD
80
dB
1/fs
µs
(Note 10)
31
0
Frequency Response (Note 9) -3dB
-0.5dB
FR
0.9
2.7
6.0
Hz
Hz
Hz
-0.1dB
DAC Digital Filter:
Passband
(Note 9)
±0.01dB
-6.0dB
PB
0
-
24.1
20.0
-
kHz
kHz
kHz
dB
dB
1/fs
22.05
30
Stopband
Passband Ripple
Stopband Attenuation
Group Delay
SB
PR
SA
GD
±0.005
75
(Note 10)
DAC Digital Filter + SCF + SMF:
Frequency Response:
FR
0
20.0kHz
40kHz (Note 11)
80kHz (Note 12)
−0.1
−0.2
−1.0
dB
dB
dB
Note: 9. The passband and stopband frequencies scale with fs. For example, 20.02kHz at −0.02dB is 0.454 x fs.
Note: 10. The calculated delay time induced by digital filtering. This time is from the input of an analog signal
to the setting of 24bit data both channels to the ADC output register for ADC.
For DAC, this time is from setting the 24bit data of both channels on DAC input register to the output of an
analog signal.
Note: 11. fs = 96kHz.
Note: 12. fs = 192kHz.
MS0118-E-00
2001/11
- 10 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
