ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 20

• Manufacturer Part Number: ak4648
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

(Ta=25°C; AVDD, DVDD=2.6 ∼ 3.6V; TVDD=1.6 ∼ 3.6V; HVDD=2.6 ∼ 5.0V; fs=44.1kHz; DEM=OFF;
FIL1=FIL3=EQ=FBEQ=OFF)
Parameter
ADC Digital Filter (Decimation LPF):
Passband (Note 43)
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 44)
Group Delay Distortion
ADC Digital Filter (HPF): (Note 45)
Frequency Response (Note 43)
DAC Digital Filter (LPF):
Passband (Note 43)
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 44)
DAC Digital Filter (LPF) + SCF:
Frequency Response: 0 ∼ 20.0kHz
DAC Digital Filter (HPF): (Note 45)
Frequency Response (Note 43)
Note 43. The passband and stopband frequencies with fs (system sampling rate).
Note 44. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the
Note 45. When PMADL bit = “1” or PMADR bit = “1”, the HPF of ADC is enabled but the HPF of DAC is disabled.
MS0625-E-01
For example, DAC is PB=0.454*fs (@−0.7dB). 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 25/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.
±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
- 20 -
26.1
25.2
min
73
59
0
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
22.05
±1.0
19.4
19.9
22.1
20.0
typ
0.9
2.7
6.0
0.9
2.7
6.0
19
26
0
-
-
-
-
-
-
-
-
±0.01
max
17.3
±0.1
19.6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[AK4648]
Units
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
1/fs
1/fs
2007/06
dB
dB
Hz
Hz
Hz
dB
dB
dB
Hz
Hz
Hz
μs