AK4641 Datasheet, PDF (8/51 Pages) Asahi Kasei Microsystems – 16 BIT CODEC WITH BLUETOOTH INTERFACE

ASAHI KASEI
[AK4641]
FILTER CHARACTERISTICS (Stereo CODEC)
(Ta=−10 ∼ 70°C; AVDD, DVDD, BVDD=2.6 ∼ 3.6V; fs=44.1kHz; DEM=OFF)
Parameter
Symbol
min
typ
ADC Digital Filter (Decimation LPF):
Passband (Note 16)
±0.1dB
PB
0
-
−1.0dB
-
20.0
−3.0dB
-
21.1
Stopband
SB
25.7
-
Passband Ripple
PR
-
-
Stopband Attenuation
SA
68
-
Group Delay (Note 17)
GD
-
17.0
Group Delay Distortion
∆GD
-
0
ADC Digital Filter (HPF):
Frequency Response
−3.0dB
FR
-
3.4
(Note 16)
−0.5dB
−0.1dB
-
10
-
22
DAC Digital Filter:
Passband (Note 16)
±0.1dB
PB
0
-
−0.7dB
−6.0dB
-
20.0
-
22.05
Stopband
SB
25.2
-
Passband Ripple
PR
-
-
Stopband Attenuation
SA
59
-
Group Delay
(Note 17)
GD
-
17.9
DAC Digital Filter + SCF:
Frequency Response: 0 ∼ 20.0kHz
FR
-
±1.0
max
17.4
-
-
-
±0.1
-
-
-
-
-
-
19.6
-
-
-
±0.01
-
-
-
Units
kHz
kHz
kHz
kHz
dB
dB
1/fs
µs
Hz
Hz
Hz
kHz
kHz
kHz
dB
dB
1/fs
dB
Note 16. The passband and stopband frequencies scale with fs (system sampling rate).
For example, ADC is PB=0.454*fs (@-1.0dB), DAC is PB=0.454*fs (@-0.01dB).
Note 17. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the
16bit data of both channels from the input register to the output register of the ADC. This time includes the group
delay of the HPF. For the DAC, this time is from setting the 16bit data of both channels from the input register to
the output of analog signal.
MS0301-E-00
-8-
2004/05