參數(shù)資料
型號(hào): AK4397EQ
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: High Performance Premium 32-Bit DAC
中文描述: 優(yōu)質(zhì)高性能32位DAC
文件頁(yè)數(shù): 35/37頁(yè)
文件大?。?/td> 513K
代理商: AK4397EQ
[AK4397]
MS0616-E-00
2007/05
- 35 -
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 AK4397 can achieve this filter
response by combination of the internal filter (Table 17) and an external filter (Figure 19).
Frequency
20kHz
50kHz
100kHz
Table 17. Internal Filter Response at DSD mode
AOUT-
Gain
0.4dB
2.8dB
15.5dB
1.8k
4.3k
1.0k
1.8k
1.0k
4.3k
270p
+Vop
270p
-Vop
AOUT+
3300p
Analog
Out
2.0k
2.0k
2200p
-
+
2.8Vpp
6.34Vpp
2.8Vpp
Figure 19. External 3rd order LPF Circuit Example for DSD
Frequency
20kHz
50kHz
100kHz
DC gain = 1.07dB
Table 18. 3rd order LPF (Figure 19) Response
Gain
0.05dB
0.51dB
16.8dB
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