ak4647 AKM Semiconductor, Inc., ak4647 Datasheet - Page 10

• Manufacturer Part Number: ak4647
• Description: Stereo Codec With Mic/hp-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
(Ta=25°C; AVDD, DVDD=2.6 ∼ 3.6V; HVDD=2.6 ∼ 5.25V; fs=44.1kHz; DEM=OFF; FIL1=FIL3=EQ=OFF)
Parameter
ADC Digital Filter (Decimation LPF):
Passband (Note 22)
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 23)
Group Delay Distortion
ADC Digital Filter (HPF): (Note 24)
Frequency Response (Note 22)
DAC Digital Filter (LPF):
Passband (Note 22)
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 23)
DAC Digital Filter (LPF) + SCF:
Frequency Response: 0 ∼ 20.0kHz
DAC Digital Filter (HPF): (Note 24)
Frequency Response (Note 22)
BOOST Filter: (Note 25)
Frequency Response
Note 22. The passband and stopband frequencies scale with fs (system sampling rate).
Note 23. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the
Note 24. When PMADL bit = “1” or PMADR bit = “1”, the HPF of ADC is enabled but the HPF of DAC is disabled.
Note 25. These frequency responses scale with fs. If a high-level and low frequency signal is input, the analog output clips
MS0566-E-00
For example, ADC is PB=0.454*fs (@-1.0dB). Each response refers to that of 1kHz.
16-bit 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 16-bit data of both channels from the input
register to the output of analog signal. Group delay of DAC part is 22/fs(typ) at PMADL=PMADR bits = “0”.
When PMADL=PMADR bits = “0”, PMDAC bit = “1”, the HPF of DAC is enabled but the HPF of ADC is
disabled.
to the full-scale.
MIN
MID
MAX
20Hz
100Hz
1kHz
20Hz
100Hz
1kHz
20Hz
100Hz
1kHz
±0.16dB
−0.66dB
−1.1dB
−6.9dB
−3.0dB
−0.5dB
−0.1dB
±0.1dB
−0.7dB
−6.0dB
−3.0dB
−0.5dB
−0.1dB
FILTER CHARACTERISTICS
Symbol
ΔGD
GD
GD
SA
SA
PB
SB
PR
FR
PB
SB
PR
FR
FR
FR
FR
FR
- 10 -
26.1
25.2
min
73
59
0
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
22.05
10.80
16.06
10.54
±1.0
19.4
19.9
22.1
20.0
5.76
2.92
0.02
6.84
0.13
0.37
typ
0.9
2.7
6.0
0.9
2.7
6.0
19
22
0
-
-
-
-
-
-
-
-
±0.01
max
17.3
±0.1
19.6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[AK4647]
Units
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
1/fs
1/fs
2006/11
dB
dB
Hz
Hz
Hz
dB
dB
dB
Hz
Hz
Hz
dB
dB
dB
dB
dB
dB
dB
dB
dB
μs