[AK4480]
AK4480
AOUT-
3.9k
4.7k
470p
150
+Vop
3.9n
3.9k
Analog
Out
150
AOUT+
-Vop
4.7k
470p
Figure 19. External LPF Circuit Example 1 for PCM (fc = 99.0kHz, Q=0.680)
Frequency Response
20kHz
Gain
−0.036dB
−0.225dB
−1.855dB
40kHz
80kHz
Table 23. Frequency Response of External LPF Circuit Example 1 for PCM
+15
-15
3.3n
+
10u
100u
180
3.9n
0.1u
7
4
3
2
+
AOUTL-
6
+
-
330
10u
+
0.1u
10u
NJM5534D
560
+
0.1u
1.0n
680
100
2
-
4
620
620
6
Lch
+
3
1.0n 7NJM5534D
3.3n
180
3.9n
+
10u
10u
100u
0.1u
7
+
3
AOUTL+
+
-
6
2
330
+10u
0.1u
4
NJM5534D
+
0.1u
680
Figure 20. External LPF Circuit Example 2 for PCM
1st Stage
182kHz
0.637
2nd Stage
284kHz
-
Total
-
-
Cut-off Frequency
Q
Gain
+3.9dB
-0.025
-0.106
-0.517
-0.88dB
-0.021
-0.085
-0.331
+3.02dB
-0.046dB
-0.191dB
-0.848dB
20kHz
40kHz
80kHz
Frequency
Response
Table 24. Frequency Response of External LPF Circuit Example 2 for PCM
MS1146-E-03
2012/01
- 40 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
