AK4650 Datasheet, PDF (15/86 Pages) Asahi Kasei Microsystems – 16Bit ΔΣ CODEC with MIC/HP/SPK-AMP & TSC

[AK4650]
FILTER CHARACTERISTICS
(Ta=25°C; AVDD, HVDD, DVDD, TSVDD=2.7 ∼ 3.6V; fs=48kHz; DEM=OFF)
Parameter
Symbol
min
typ
ADC Digital Filter (Decimation LPF):
Passband (Note 30)
±0.1dB
PB
0
-
−1.0dB
-
21.8
−3.0dB
-
23.0
Stopband
SB
29.4
-
Passband Ripple
PR
-
-
Stopband Attenuation
SA
65
-
Group Delay (Note 31)
GD
-
17.0
Group Delay Distortion
ΔGD
-
0
ADC Digital Filter (HPF):
Frequency Response (Note 30) −3.0dB
FR
-
1.0
−0.1dB
-
6.5
DAC Digital Filter:
Passband (Note 30)
±0.1dB
PB
−6.0dB
0
-
-
24.0
Stopband
SB
25.2
-
Passband Ripple
PR
-
-
Stopband Attenuation
SA
59
-
Group Delay (Note 31)
GD
-
16.8
DAC Digital Filter + SCF:
Frequency Response: 0 ∼ 20.0kHz
FR
-
±1.0
BOOST Filter: (Note 32)
Frequency Response MIN 20Hz
FR
-
5.80
100Hz
-
3.17
1kHz
-
0.03
MID 20Hz
FR
-
10.85
100Hz
-
7.23
1kHz
-
0.18
MAX 20Hz
FR
-
16.14
100Hz
-
11.05
1kHz
-
0.47
max
18.9
-
-
-
±0.1
-
-
-
-
-
21.3
-
-
±0.01
-
-
-
-
-
-
-
-
-
-
-
-
Units
kHz
kHz
kHz
kHz
dB
dB
1/fs
μs
Hz
Hz
kHz
kHz
kHz
dB
dB
1/fs
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Note 30. The passband and stopband frequencies scale with fs (system sampling rate).
For example, ADC is PB=0.454 × fs (@−1.0dB). The reference frequency of these responses is 1kHz.
Note 31. 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 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 16-bit data of both channels from the input register to the output of analog
signal.
Note 32. These frequency responses scale with fs. If a high-level and low frequency signal is input, the analog output clips
to the full-scale.
MS0502-E-01
- 15 -
2007/04