AK4551 Datasheet, PDF (5/15 Pages) Asahi Kasei Microsystems – LOW POWER & SMALL PACKAGE 20BIT CODEC

ASAHI KASEI
[AK4551]
FILTER CHARACTERISTICS
(Ta=25°C; VDD=2.2 ∼ 3.6V; fs=44.1kHz; DEM0=“1”, DEM1=“0”)
Parameter
Symbol
min
typ
max
Units
ADC Digital Filter (Decimation LPF):
Passband
(Note 6) ±0.1dB
PB
-1.0dB
-3.0dB
0
17.4
kHz
20.0
kHz
21.1
kHz
Stopband
SB
27.0
kHz
Passband Ripple
Stopband Attenuation
PR
SA
65
±0.1
dB
dB
Group Delay
(Note 7)
GD
17.0
1/fs
Group Delay Distortion
∆GD
0
us
ADC Digital Filter (HPF):
Frequency Response (Note 6) -3dB
FR
3.4
Hz
-0.5dB
10
Hz
-0.1dB
22
Hz
DAC Digital Filter:
Passband
(Note 6) ±0.1dB
PB
-6.0dB
0
20.0
kHz
22.05
kHz
Stopband
SB
24.1
kHz
Passband Ripple
Stopband Attenuation
PR
SA
43
±0.06
dB
dB
Group Delay
(Note 7)
GD
15.4
1/fs
Group Delay Distortion
∆GD
0
us
DAC Digital Filter + Analog Filter
Frequency Response
0 ∼ 20.0kHz
FR
±0.5
dB
Note 6. 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.
Note 7. The calculating delay time which occurred by digital filtering. This time is from the input of analog signal to setting
the 20bit data of both channels to the output register for ADC. For DAC, this time is from setting the 20bit data of
both channels on input register to the output of analog signal.
DC CHARACTERISTICS
(Ta=25°C; VDD=2.2 ∼ 3.6V)
Parameter
Symbol
min
typ
High-Level Input Voltage
Low-Level Input Voltage
VIH
70%VDD
-
VIL
-
-
High-Level Output Voltage (Iout=-20uA)
VOH
VDD-0.1
-
Low-Level Output Voltage (Iout=20uA)
VOL
-
Input Leakage Current
Iin
-
-
max
-
30%VDD
-
0.1
± 10
Units
V
V
V
V
uA
MS0029-E-00
-5-
2000/5