ak4644 AKM Semiconductor, Inc., ak4644 Datasheet - Page 11

• Manufacturer Part Number: ak4644
• Description: Stereo Codec With Mic/hp/rcv-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 24)
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 25)
Group Delay Distortion
ADC Digital Filter (HPF): (Note 26)
Frequency Response (Note 24)
DAC Digital Filter (LPF):
Passband (Note 24)
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 25)
DAC Digital Filter (LPF) + SCF:
Frequency Response: 0 ∼ 20.0kHz
DAC Digital Filter (HPF): (Note 26)
Frequency Response (Note 24)
BOOST Filter: (Note 27)
Frequency Response
Note 24. The passband and stopband frequencies scale with fs (system sampling rate).
Note 25. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the
Note 26. When PMADL bit = “1” or PMADR bit = “1”, the HPF of ADC is enabled but the HPF of DAC is disabled.
Note 27. These frequency responses scale with fs. If a high-level and low frequency signal is input, the analog output clips
MS0477-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.
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
∆GD
GD
GD
SA
SA
PB
SB
PR
FR
PB
SB
PR
FR
FR
FR
FR
FR
- 11 -
min
26.1
25.2
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
25
0
-
-
-
-
-
-
-
-
±0.01
max
17.3
±0.1
19.6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[AK4644]
Units
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
1/fs
1/fs
2006/10
dB
dB
Hz
Hz
Hz
dB
dB
dB
Hz
Hz
Hz
dB
dB
dB
dB
dB
dB
dB
dB
dB
µs