ASAHI KASEI
[AK4633]
FILTER CHRACTERISTICS
(Ta = 25°C; AVDD =2.2 ∼ 3.6V, DVDD =1.6 ∼ 3.6V, SVDD =2.2 ∼ 4.0V; fs=8kHz)
Parameter
Symbol
min
typ
max
Units
ADC Digital Filter (Decimation LPF):
Passband
(Note 19) ±0.16dB
−0.66dB
PB
0
-
-
-
4.7
-
-
3.5
3.6
4.0
-
3.0
-
-
-
kHz
kHz
kHz
kHz
kHz
dB
−1.1dB
−6.9dB
Stopband
Passband Ripple
(Note 19)
SB
PR
-
-
±0.1
Stopband Attenuation
SA
GD
∆GD
73
-
-
-
16
0
-
-
-
dB
1/fs
µs
Group Delay
(Note 20)
Group Delay Distortion
DAC Digital Filter (Decimation LPF):
Passband
(Note 19)
±0.16dB
−0.54dB
−1.0dB
−6.7dB
PB
0
-
-
-
4.7
-
-
3.5
3.6
4.0
-
3.0
-
-
-
Stopband
Passband Ripple
(Note 19)
SB
PR
-
kHz
dB
-
±0.1
Stopband Attenuation
SA
GD
∆GD
73
-
-
-
16
0
-
-
-
dB
1/fs
µs
Group Delay
(Note 20)
Group Delay Distortion
DAC Digital Filter + Analog Filter:
Frequency Response: 0 ∼ 3.4kHz
FR
-
±1.0
-
dB
Note 19. The passband and stopband frequencies are proportional to fs (system sampling rate).
For example, ADC is PB=3.6kHz (@-1.0dB)= 0.45 x fs. A reference of frequency response is 1kHz.
Note 20. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the
16-bit data of a channel from the input register to the output register of the ADC.
For the DAC, this time is from setting the 16-bit data of a channel from the input register to the output of analog
signal.
In case of selected the path through the programming filter (1st HPF + 2-band Equalizer + ALC), the Group
Delay should be increased to 2/fs without the phase changing by IIR filter.
DC CHRACTERISTICS
(Ta = 25°C; AVDD =2.2 ∼ 3.6V, DVDD =1.6 ∼ 3.6V, SVDD =2.2 ∼ 4.0V)
Parameter
Symbol
min
typ
max
Units
V
V
V
V
High-Level Input Voltage
(DVDD ≥ 2.2V)
(DVDD < 2.2V)
(DVDD ≥ 2.2V)
(DVDD < 2.2V)
(Iout=−80µA)
VIH
70%DVDD
80%DVDD
-
-
-
-
-
-
-
-
-
Low-Level Input Voltage
VIL
-
-
30%DVDD
20%DVDD
High-Level Output Voltage
Low-Level Output Voltage
Input Leakage Current
VOH
VOL
Iin
DVDD−0.4
-
V
V
(Iout= 80µA)
-
0.4
±10
-
µA
MS0447-E-03
2006/04
- 12 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
