[AK4675]
FILTER CHARACTERISTICS (CODEC)
(Ta=25°C; AVDD=PVDD=SAVDD=2.2 ∼ 3.6V; DVDD=TVDD2=TVDD3=1.6 ∼ 3.6V; fs=44.1kHz; Programmable
Filter=OFF)
Parameter
Symbol
min
typ
max
Units
ADC Digital Filter (Decimation LPF):
Passband (Note 49)
PB
0
-
-
-
-
19.4
19.9
22.1
-
-
-
19
0
17.3
-
-
-
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
μs
±0.16dB
−0.66dB
−1.1dB
−6.9dB
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 50)
Group Delay Distortion
SB
PR
SA
GD
ΔGD
25.9
-
-
69
-
±0.1
-
-
-
-
DAC Digital Filter (LPF):
Passband (Note 49)
PB
0
-
-
20.0
21.1
-
-
-
17.4
-
-
-
±0.1
-
-
kHz
kHz
kHz
kHz
dB
±0.1dB
−1.0dB
−3.0dB
-
25.7
-
68
-
Stopband
SB
PR
SA
GD
Passband Ripple
Stopband Attenuation
Group Delay (Note 50)
dB
1/fs
19
DAC Digital Filter (LPF) + SCF:
FR
-
-
dB
Frequency Response: 0 ∼ 20.0kHz
±1.4
Note 49. The passband and stopband frequencies scale with fs (system sampling rate).
For example, DAC is PB=0.454 x fs (@−0.7dB). Each response refers to that of 1kHz.
Note 50. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the
16-bit data of both channels from the input register to the output register of the ADC.
For the DAC, this time is from setting the 16-bit data of both channels from the input register to the output of
analog signal.
MS0963-E-00
2008/05
- 20 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
