AK4691EG AKM [Asahi Kasei Microsystems], AK4691EG Datasheet - Page 13

• Manufacturer Part Number: AK4691EG
• Description: 4ch ADC + 2ch DAC with MIC/HP/SPK-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

(Ta=25°C; AVDD=DVDD=SVDD=2.6 ∼ 3.6V; LVDD=MVDD= 2.6 ∼ 5.5V; TVDD1=TVDD2=1.6 ∼ 3.6V; fs=48kHz;
DEM=OFF; FIL1=FIL3=EQ=OFF)
Parameter
ADC Digital Filter (Decimation LPF):
Passband
Stopband
Passband Ripple
Stopband Attenuation
Group Delay
Group Delay Distortion
ADC Digital Filter (HPF):
Frequency Response
DAC Digital Filter (LPF):
Passband
Stopband
Passband Ripple
Stopband Attenuation
Group Delay
DAC Digital Filter (LPF) + SCF:
Frequency Response: 0 ∼ 20.0kHz
DAC Digital Filter (HPF):
Frequency Response
BOOST Filter:
Frequency Response
Note 34. The passband and stopband frequencies scale with fs (system sampling rate).
Note 35. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the
Note 36. When PMADC1 bit = “1” or PMADC2 bit = “1”, the HPF of ADC is enabled but the HPF of DAC is disabled.
Note 37. These frequency responses scale with fs. If a high-level and low frequency signal is input, the analog output clips
MS0672-E-00
For example, ADC is PB=0.45 x fs (@-1.1dB). Each response refers to that of 1kHz.
DAC group delay is at PMADC1 = PMADC2 bits = “0”. When PMADC1 bit is “1” or PMADC2 bit is “1”, it is
typ. 19/fs.
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.
When PMADC1 = PMADC2 bits = “0” and PMDAC bit = “1”, the HPF of DAC is enabled (@ HPFN bit = “0”)
but the HPF of ADC is disabled.
to the full-scale.
(Note
(Note
(Note
(Note
34)
34)
(Note
35)
35)
(Note
(Note
37)
MIN
MID
MAX
34)
34)
(Note
(Note
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
36)
36)
FILTER CHARACTERISTICS
Symbol
ΔGD
GD
GD
PB
SB
PR
SA
FR
PB
SB
PR
SA
FR
FR
FR
FR
FR
- 13 -
28.4
25.2
min
73
59
0
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
17.48
11.47
21.1
21.6
24.0
21.8
24.0
±1.0
6.27
3.18
0.02
11.6
7.44
0.14
0.40
typ
1.0
2.9
6.5
1.0
2.9
6.5
19
26
0
-
-
-
-
-
-
-
-
±0.01
max
±0.1
18.8
21.3
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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[AK4691]
Units
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
1/fs
1/fs
2007/11
dB
dB
Hz
Hz
Hz
dB
dB
dB
Hz
Hz
Hz
dB
dB
dB
dB
dB
dB
dB
dB
dB
μs