AK4683_07 Datasheet, PDF (10/84 Pages) Asahi Kasei Microsystems – Asynchronous Multi-Channel Audio CODEC with DIR/T

[AK4683]
FILTER CHARACTERISTICS
(Ta=25°C; AVDD1, AVDD2, DVDD, PVDD, HVDD=4.5∼5.5V; TVDD=2.7∼5.5V; fs=48kHz)
Parameter
Symbol
min
typ
ADC Digital Filter (Decimation LPF):
Passband
(Note 14) ±0.1dB
PB
-0.2dB
-3.0dB
0
-
20.0
-
23.0
Stopband
SB
28.0
Passband Ripple
PR
Stopband Attenuation
SA
68
Group Delay
(Note 15)
GD
19
Group Delay Distortion
ΔGD
0
ADC Digital Filter (HPF):
Frequency Response (Note 14) -3dB
FR
1.0
-0.1dB
6.5
DAC Digital Filter:
Passband
(Note 14) -0.1dB
PB
0
-6.0dB
-
24.0
Stopband
SB
26.2
Passband Ripple
PR
Stopband Attenuation
SA
54
Group Delay
(Note 15)
GD
21
DAC Digital Filter + Analog Filter:
Frequency Response:
0 ∼ 20.0kHz
FR
±0.2
40.0kHz (Note 16)
FR
±0.3
80.0kHz (Note 16)
FR
±1.0
max
18.9
-
-
±0.04
21.8
-
±0.02
Units
kHz
kHz
kHz
kHz
dB
dB
1/fs
µs
Hz
Hz
kHz
kHz
kHz
dB
dB
1/fs
dB
dB
dB
Note 14. The passband and stopband frequencies are proportional to fs.
For example, 21.8kHz at –0.1dB is 0.454 x fs (DAC). The reference frequency of these responses is 1kHz.
Note 15. The calculating delay time which occurred by digital filtering. This time is from setting the input of analog
signal to setting the 24bit data of both channels to the output register of PORTA or PORTB.
For DAC, this time is from setting the 20/24bit data of both channels on input register of PORTA or PORTB to
the output of analog signal.
Note 16. 40kHz@fs=96kHz, 80kHz@fs=192kHz
MS0427-E-02
- 10 -
2007/04