AK4497 Datasheet, PDF (93/98 Pages) Asahi Kasei Microsystems – Quality Oriented 32-Bit 2ch DAC

Table 43. Frequency Response of External LPF Circuit Example 1
Gain(1kHz,typ)
0 dB
Frequency
Response
20kHz
40kHz
-0.07 dB
-0.32 dB
(ref:1kHz,typ)
80kHz
-2.13 dB
AK4497
AOUT-
AOUT+
215
39.2n
33.2
255n 90.9
590
33 3.09n
+Vop
5.1
20n
2
7
6
3
4
-Vop
OPA1611
Analog
Out
[AK4497]
Figure 71. External LPF Circuit Example 2 (fc = 104kHz(typ), Q=0.693(typ))
Table 44. Frequency Response of External LPF Circuit Example 2
Gain(1kHz,typ)
+8.78 dB
Frequency
20kHz
-0.02 dB
Response
40kHz
-0.15 dB
(ref:1kHz,typ)
80kHz
-1.46 dB
AK4497
AOUT-
100u
+
22
27n
22
56n
38
2
+
-
*
4
1
OPA1612
400
+ _10u
0.1u
10u
+
0.1u
+15
-15
Lch
100u
AOUT+ ⁺
22
27n
22
56n
58
6
+
-
7
4
OPA1612
LME49710
400
+ _10u
0.1u
10u
+
0.1u
Figure 72. External LPF Circuit Example 3 (fc = 186kHz(typ), Q=0.67(typ))
Table 45. Frequency Response of External LPF Circuit Example 3
Gain(1kHz,typ)
+9.54 dB
Frequency
20kHz
-0.01 dB
Response
40kHz
-0.06 dB
(ref:1kHz,typ)
80kHz
-0.32 dB
Rev. 0.1
- 93 -
2015/11