[AK4129]
3. Digital Filter Response Example
Table 14 shows the examples of digital filter response performed by the AK4129.
Stopband
Attenuation [dB]
Ratio
FSO/FSI [kHz] Passband [kHz] Stopband [kHz]
Gain [dB]
4.000
1.000
0.919
0.725
0.667
0.544
0.500
0.500
0.459
0.363
0.333
0.250
0.250
0.230
0.167
0.181
0.167
0.181
192/48.0
48.0/48.0
44.1/48.0
32.0/44.1
32.0/48.0
48.0/88.2
48.0/96.0
44.1/88.2
44.1/96.0
32.0/88.2
32.0/96.0
48.0/192.0
44.1/176.4
44.1/192.0
32.0/192.0
32.0/176.4
8/48.0
22.000
22.000
20.000
14.088
13.688
19.250
20.900
19.202
18.700
12.863
12.500
17.600
16.170
15.860
11.200
10.278
2.800
26.000
26.000
24.100
17.487
17.488
26.232
27.000
24.806
25.000
18.665
18.900
30.200
27.746
28.240
19.600
17.987
4.900
−121.2
−121.2
−121.4
−115.3
−116.9
−114.6
−100.2
−100.2
−103.3
−102.0
−103.6
−104.0
−104.0
−103.3
−73.2
−0.01@ 20k
−0.01@ 20k
−0.01@ 20k
−0.01@ 14.5k
−0.19@ 14.5k
−0.03@ 20k
−0.01@ 20k
−0.08@ 20k
−0.23@ 20k
−0.75@ 14.5k
−1.07@ 14.5k
−0.18@ 20k
−1.34@ 20k
−1.40@ 20k
−2.97@ 14.5k
−7.88@ 14.5k
−2.97@ 3.625k
−7.88@ 3.625k
−73.2
−73.2
−73.2
8/44.1
2.5695
4.4968
Table 14. Digital Filter Example
4. I2C bus Connection
SCL and SDA pins should be connected to DVDD1-4 through the resistor based on I2C standard. As there is a protection
between each pin and DVDD1-4, the pulled up voltage must be DVDD1-4 or lower (Figure 51).
+3.3V
DVDD1-4
AK4129
SDA pin
VSS2-5
Figure 51. SDA pin output
MS1173-E-01
2010/09
- 47 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
