AK4390 Datasheet, PDF (29/32 Pages) Asahi Kasei Microsystems – Ultra Low Latency 32-Bit ΔΣ DAC

AK4390
AOUT-
AOUT+
[AK4390]
1.5k
2.2n
1.5k
1.5k
1.5k
750
1n
+Vop
750
1n ^-Vop
Analog
Out
Figure 14. External LPF Circuit Example 1 for PCM (fc = 125kHz, Q=0.692)
Frequency Response
Gain
20kHz
−0.012dB
40kHz
−0.083dB
80kHz
−0.799dB
Table 8. Filter Response of External LPF Circuit Example 1 for PCM
100u
AOUTL- ⁺
330
3.3n
180
3.9n
37
2
+
-4
6
NJM5534D
680
+ _10u
0.1u
10u
+
0.1u
100u
AOUTL+ ⁺
330
3.3n
180
3.9n
3
7
+
2-
6
4
NJM5534D
680
+ _10u
0.1u
10u
+
0.1u
+15
-15
620
620
560
0.1u +^10u
1.0n
2 _- 4 ₆ ¹⁰⁰
3 ⁺⁷
Lch
1.0n NJM5534D
0.1u
+ _10u
Figure 15. External LPF Circuit Example 2 for PCM
1^st Stage
2^nd Stage
Total
Cut-off Frequency
182kHz
284kHz
-
Q
0.637
-
-
Gain
+3.9dB
-0.88dB
+3.02dB
Frequency
Response
20kHz
40kHz
80kHz
-0.025
-0.106
-0.517
-0.021
-0.085
-0.331
-0.046dB
-0.191dB
-0.848dB
Table 9. Filter Response of External LPF Circuit Example 2 for PCM
MS1046-E-00
- 29 -
2009/01