ASAHI KASEI
[AK4550]
FILTER CHARACTERISTICS
(Ta=25°C; VDD=2.3
∼
3.6V; fs=44.1kHz; DEM0=”1”, DEM1=”0”)
Parameter
Symbol
min
typ
ADC Digital Filter (Decimation LPF):
Passband
(Note 7)
±0.1dB
PB
0
20.0
-1.0dB
21.1
-3.0dB
Stopband
SB
27.0
Passband Ripple
PR
Stopband Attenuation
SA
65
Group Delay
(Note 8)
GD
17.0
Group Delay Distortion
∆GD
ADC Digital Filter (HPF):
Frequency Response (Note 7) -3dB
FR
3.4
-0.5dB
10
-0.1dB
22
DAC Digital Filter:
Passband
(Note 7)
±0.1dB
PB
0
22.05
-6.0dB
Stopband
SB
24.1
Passband Ripple
PR
Stopband Attenuation
SA
43
Group Delay
(Note 8)
GD
14.8
DAC Digital Filter + Analog Filter
FR
Frequency Response
0
∼
20.0kHz
±0.5
max
17.4
Units
kHz
kHz
kHz
kHz
dB
dB
1/fs
us
Hz
Hz
Hz
±0.1
0
20.0
±0.06
kHz
kHz
kHz
dB
dB
1/fs
dB
Notes: 7. The passband and stopband frequencies scale with fs (sampling frequency).
For examples, PB=20.0kHz(@ADC: -1.0dB, DAC: -0.1dB) are 0.454 x fs.
8. The calculating delay time which occurred by digital filtering. This time is from the input of analog signal to
setting the 16bit data of both channels to the output register for ADC. For DAC, this time is from setting the
16bit data of both channels on input register to the output of analog signal.
DC CHARACTERISTICS
(Ta=25°C; VDD=2.3
∼
3.6V)
Parameter
High-Level Input Voltage
Low-Level Input Voltage
High-Level Output Voltage (Iout=-20uA)
Low-Level Output Voltage
(Iout=20uA)
Input Leakage Current
Symbol
VIH
VIL
VOH
VOL
Iin
min
70%VDD
-
VDD-0.1
-
-
typ
-
-
-
-
max
-
30%VDD
-
0.1
±
10
Units
V
V
V
V
uA
M0068-E-01
-5-
2000/4
AKM [ ASAHI KASEI MICROSYSTEMS ]
