AK4695 Datasheet, PDF (14/107 Pages) Asahi Kasei Microsystems – 24bit 4ch CODEC with MIC/HP/SPK/LINE-AMP

[AK4695]
ADC FILTER CHARACTERISTICS (fs=48kHz)
(Ta =25C; AVDD= SVDD=2.7 ~ 3.5V, DVDD =1.6  2.0V, TVDD=(DVDD-0.2) ~ 3.5V)
Parameter
Symbol
min
typ
max
Unit
ADC Digital Filter (Decimation LPF):
Passband (Note 34)
0.16dB
PB
0
-
18.8
kHz
0.66dB
-
21.1
-
kHz
1.1dB
-
21.7
-
kHz
6.9dB
-
24.1
-
kHz
Stopband (Note 34)
SB
28.4
-
-
kHz
Passband Ripple
PR
-
-
0.16
dB
Stopband Attenuation
SA
73
-
-
dB
Group Delay (Note 35)
GD
-
17
-
1/fs
Group Delay Distortion
GD
-
0
-
s
ADC Digital Filter (HPF):
Frequency Response (Note 34) 3.0dB
FR
-
3.7
-
Hz
0.5dB
-
10.9
-
Hz
0.1dB
-
23.9
-
Hz
Note 34. The passband and stopband frequencies scale with fs (system sampling rate). Each response refers to that of 1kHz.
Note 35. A calculating delay time which induced by digital filtering. This time is from the input of an analog signal to the
setting of 24-bit data of both channels to the ADC output register. For the signal through the programmable filters
(HPF1 + HPF2 + LPF + 2-band Equalizer + ALC + SMUTE), the group delay is increased 2/fs from the value
above if there is no phase change by the IIR filter.
DAC FILTER CHARACTERISTICS (fs=48kHz)
(Ta =25C; AVDD= SVDD=2.7 ~ 3.5V, DVDD =1.6  2.0V, TVDD=(DVDD-0.2) ~ 3.5V)
Parameter
Symbol
min
typ
max
Unit
DAC Digital Filter (LPF):
Passband (Note 36)
0.05dB
PB
0
-
21.8
kHz
6.0dB
-
24.0
-
kHz
Stopband (Note 36)
SB
26.2
-
-
kHz
Passband Ripple
PR
-
-
0.05
dB
Stopband Attenuation
SA
54
-
-
dB
Group Delay (Note 37)
GD
-
22
-
1/fs
DAC Digital Filter (LPF) + SCF:
Frequency Response: 0  20.0kHz
FR
-
1.0
-
dB
Note 36. The passband and stopband frequencies scale with fs (system sampling rate). Each response refers to that of 1kHz.
Note 37. A calculating delay time which induced by digital filtering. This time is from setting the 24bit data of both
channels to input register to the output of analog signal. For the signal through the programmable filters (HPF1 +
HPF2 + LPF +2-band Equalizer + ALC + SMUTE) and DRC, the group delay is increased 2/fs each from the
value above if there is no phase change by the IIR filter.
MS1463-E-01
- 14 -
2014/12