AK4953A Datasheet, PDF (12/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4953A]
ADC FILTER CHARACTERISTICS (fs=44.1kHz)
(Ta =25°C; AVDD=2.85~3.5V, DVDD=1.6∼2.0V, TVDD=DVDD~3.5V, SVDD=0.9 ∼ 5.5V)
Parameter
Symbol
min
typ
max
ADC Digital Filter (Decimation LPF):
Passband (Note 27)
±0.16dB
PB
−0.66dB
0
-
17.3
-
19.4
-
−1.1dB
-
19.9
-
−6.9dB
-
22.1
-
Stopband
SB
26.1
-
-
Passband Ripple
PR
-
-
±0.16
Stopband Attenuation
SA
73
-
-
Group Delay (Note 28)
GD
-
16
-
Group Delay Distortion
ΔGD
-
0
-
ADC Digital Filter (HPF): HPFC1-0 bits = “00”
Frequency Response
−3.0dB
FR
-
3.4
-
−0.5dB
-
10
-
−0.1dB
-
22
-
Units
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
μs
Hz
Hz
Hz
ADC FILTER CHARACTERISTICS (fs=96kHz)
(Ta =25°C; AVDD=2.85~3.5V, DVDD=1.6∼2.0V, TVDD=DVDD ~ 3.5V, SVDD=0.9 ∼ 5.5V)
Parameter
Symbol
min
typ
max
Units
ADC Digital Filter (Decimation LPF):
Passband (Note 27)
±0.16dB
PB
−0.66dB
0
-
37.7
kHz
-
42.2
-
kHz
−1.1dB
−6.9dB
-
43.3
-
kHz
-
48.0
-
kHz
Stopband
SB
56.8
-
-
kHz
Passband Ripple
PR
-
-
±0.16
dB
Stopband Attenuation
SA
73
-
-
dB
Group Delay (Note 28)
GD
-
16
-
1/fs
Group Delay Distortion
ΔGD
-
0
-
μs
ADC Digital Filter (HPF): HPFC1-0 bits = “00”
Frequency Response
−3.0dB
FR
-
7.4
-
Hz
−0.5dB
−0.1dB
-
21.8
-
Hz
-
47.9
-
Hz
Note 27. The passband and stopband frequencies scale with fs (system sampling rate). Each response refers to that of
1kHz.
Note 28. 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 (First HPF + First LPF + 4-band Equalizer + ALC + Equalizer), the group delay is increased 4/fs from the
value above if there is no phase change by the IIR filter.
MS1252-E-00
- 12 -
2010/10