參數(shù)資料
型號(hào): AK4620A
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 24 BIT 192KHZ AUDIO CODEC WITH IPGA
中文描述: 24位192kHz的音頻編解碼器單親遺傳算法
文件頁(yè)數(shù): 40/42頁(yè)
文件大?。?/td> 395K
代理商: AK4620A
ASAHI KASEI
[AK4620A]
MS0368-E-00
2004/12
- 40 -
It is recommended by 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 AK4620A can achieve this
filter response by combination of the internal filter (Table 20) and an external filter (Figure 20).
Frequency
20kHz
50kHz
100kHz
Table 20. 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 20. External 3rd order LPF Circuit Example for DSD
Frequency
20kHz
50kHz
100kHz
DC gain = 1.07dB
Table 21. 3rd order LPF (Figure 20) Response
Gain
0.05dB
0.51dB
16.8dB
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AK4620BVFPE2 制造商:Asahi Kasei Microsystems Co Ltd 功能描述: