[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
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
ΔGD
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
-
-
-
dB
Stopband
Passband Ripple
(Note 19)
SB
PR
-
kHz
dB
-
±0.1
Stopband Attenuation
SA
GD
ΔGD
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 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
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
VOH
DVDD−0.2
V
(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
-
-
-
-
-
-
-
-
0.2
0.4
20%DVDD
±10
V
V
Input Leakage Current
Iin
μA
Rev. 0.5
2007/10
- 9 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
