AK4392 AKM [Asahi Kasei Microsystems], AK4392 Datasheet - Page 38

• Manufacturer Part Number: AK4392
• Description: High Performance 120dB Premium 32-Bit DAC
• Manufacturer: AKM [Asahi Kasei Microsystems]

It is recommended for SACD format book (Scarlet Book) that the filter response at SACD playback is an analog low pass
filter with a cut-off frequency of maximum 50kHz and a slope of minimum 30dB/Oct. The AK4392 can achieve this filter
response by combination of the internal filter
MS1045-E-02
AOUT+
AOUT-
2.8Vpp
2.8Vpp
Figure 21. External 3rd Order LPF Circuit Example for DSD
2.0k
2.0k
Table 16. Internal Filter Response at DSD Mode
Table 17. 3rd Order LPF
2200p
(Table
Frequency
Frequency
100kHz
100kHz
20kHz
50kHz
20kHz
50kHz
DC gain = 1.07dB
1.8k
1.8k
16) and an external filter
3300p
4.3k
- 38 -
(Figure
−15.5dB
−0.05dB
−0.51dB
−16.8dB
1.0k
1.0k
−0.4dB
−2.8dB
Gain
Gain
270p
21) Response
4.3k
+Vop
-Vop
-
+
270p
(Figure
21).
Analog
Out
6.34Vpp
[AK4392]
2009/04