[AK4634]
FILTER CHRACTERISTICS
(Ta =
−30 ∼
85°C; AVDD = 2.2
∼
3.6V; DVDD = 1.6
∼
3.6V, SVDD = 2.2
∼
4.0V; fs=8kHz)
Parameter
Symbol
min
typ
max
ADC Digital Filter (Decimation LPF):
Passband
±0.16dB
PB
0
-
3.0
−0.66dB
-
3.5
-
−1.1dB
-
3.6
-
−6.9dB
-
4.0
-
Stopband
SB
4.7
-
-
Passband Ripple
PR
-
-
±0.1
Stopband Attenuation
SA
73
-
-
Group Delay
GD
-
16
-
Group Delay Distortion
ΔGD
-
0
-
DAC Digital Filter (Decimation LPF):
Passband
±0.16dB
PB
0
-
3.0
−0.54dB
-
3.5
-
−1.0dB
-
3.6
-
−6.7dB
-
4.0
-
Stopband
SB
4.7
-
-
Passband Ripple
PR
-
-
±0.1
Stopband Attenuation
SA
73
-
-
Group Delay
GD
-
16
-
Group Delay Distortion
ΔGD
-
0
-
DAC Digital Filter + Analog Filter:
Frequency Response: 0
∼
3.4kHz
FR
-
±1.0
-
Units
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
μs
dB
kHz
dB
dB
1/fs
μs
dB
Note 19. The passband and stopband frequencies are proportional to fs (system sampling rate).
For example, ADC of PB = 3.6kHz is 0.45*fs (@
−1.0dB).
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. When there is not a
phase change with the IIR filter, the group delay of the programmable filter (primary HPF + primary LPF +
5-band Equalizer + ALC) increases for 2/fs than a value of an above mention.
DC CHRACTERISTICS
(Ta =
−30
~ 85°C; AVDD = 2.2
∼
3.6V, DVDD = 1.6
∼
3.6V, SVDD = 2.2
∼
4.0V)
Parameter
Symbol
min
70%DVDD
VIH
High-Level Input Voltage
(DVDD
≥
2.2V)
80%DVDD
(DVDD < 2.2V)
-
VIL
Low-Level Input Voltage
(DVDD
≥
2.2V)
-
(DVDD < 2.2V)
DVDD−0.2
VOH
High-Level Output Voltage
(Iout =
−80μA)
Low-Level Output Voltage
-
(Except SDA pin: Iout = 80μA) VOL1
-
(SDA pin, 2.0V
≤
DVDD
≤
3.6V: Iout = 3mA) VOL2
-
(SDA pin, 1.6V
≤
DVDD < 2.0V: Iout = 3mA) VOL2
Input Leakage Current
Iin
-
typ
-
-
-
-
-
-
-
-
-
max
-
-
30%DVDD
20%DVDD
-
0.2
0.4
20%DVDD
±10
Units
V
V
V
V
V
V
V
μA
Rev. 0.5
-9-
2007/10
AKM [ ASAHI KASEI MICROSYSTEMS ]
