AK5354_04 Datasheet, PDF (5/19 Pages) Asahi Kasei Microsystems – Low Power 20bit ΔΣ ADC with PGA

ASAHI KASEI
[AK5354]
FILTER CHARACTERISTICS
(Ta=25°C; VA=2.1 ∼ 3.3V, VD=1.8 ∼ 3.3; fs=44.1kHz)
Parameter
Symbol
min
typ
ADC Digital Filter (Decimation LPF):
Passband
(Note 5) ±0.1dB
PB
0
-1.0dB
20.0
-3.0dB
21.1
Stopband
(Note 5)
SB
27.0
Passband Ripple
PR
Stopband Attenuation
SA
65
Group Delay
(Note 6)
GD
17.0
Group Delay Distortion
∆GD
0
ADC Digital Filter (HPF):
Frequency Response (Note 5) -3dB
FR
3.4
-0.5dB
10
-0.1dB
22
max
Units
17.4
kHz
kHz
kHz
kHz
±0.1
dB
dB
1/fs
µs
Hz
Hz
Hz
Note:5. The passband and stopband frequencies scale with fs (sampling frequency).
For examples, PB=0.454 x fs(@ADC: -1.0dB), PB=0.454 x fs(@DAC: -0.1dB).
Note: 6. 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 and include group delay of HPF.
DC CHARACTERISTICS
(Ta=25°C; VA=2.1 ∼ 3.3V, VD=1.8 ∼ 3.3V)
Parameter
Symbol
min
Typ
High-Level Input Voltage
Low-Level Input Voltage
VIH
75%VD
-
VIL
-
-
High-Level Output Voltage (Iout=-80µA)
VOH
VD-0.4
-
Low-Level Output Voltage (Iout=80µA)
VOL
-
Input Leakage Current
Iin
-
-
max
-
25%VD
-
0.4
± 10
Units
V
V
V
V
µA
MS0054-E-02
-5-
2004/12