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參數(shù)資料
| 型號： | AK4367VN |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | Low Power 24-Bit 2ch DAC with HP-AMP & Output Mixer |
| 中文描述： | 低功耗24位2通道DAC，具有惠普腺苷 |
| 文件頁數(shù)： | 13/38頁 |
| 文件大?。?/td> | 455K |
| 代理商： | AK4367VN |
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ASAHI KASEI
[AK4367]
MS0247-E-02
2005/10
- 13 -
OPERATION OVERVIEW
System Clock
The external clocks required to operate the AK4367 are MCLK(256fs/384fs/512fs), LRCK(fs) and BICK. The master
clock (MCLK) should be synchronized with sampling clock (LRCK). The phase between these clocks does not matter.
The frequency of MCLK is detected automatically, and the internal master clock becomes the appropriate frequency.
Table 1 shows system clock example.
LRCK
MCLK (MHz)
fs
256fs
384fs
8kHz
2.048
3.072
11.025kHz
2.8224
4.2336
12kHz
3.072
4.608
16kHz
4.096
6.144
22.05kHz
5.6448
8.4672
24kHz
6.144
9.216
32kHz
8.192
12.288
44.1kHz
11.2896
16.9344
48kHz
12.288
18.432
Table 1. System Clock Example
All external clocks (MCLK, BICK and LRCK) should always be present whenever the DAC is in normal operation mode
(PMDAC bit = “1”). If these clocks are not provided, the AK4367 may draw excess current and will not operate properly
because it utilizes these clocks for internal dynamic refresh of registers. If the external clocks are not present, the DAC
should be placed in power-down mode (PMDAC bit = “0”). When MCLK is input with AC coupling, the MCKAC bit
should be set to “1”.
For low sampling rates, DR and S/N degrade because of the outband noise. DR and S/N are improved by setting DFS1 bit
to “1”. Table 2 shows S/N of DAC output for both the HP-amp and MOUT. When the DFS1 bit is “1”, MCLK needs
512fs.
Over Sample
Rate
0
0
64fs
8kHz
～
48kHz
256fs/384fs/512fs
0
1
128fs
8kHz
～
24kHz
256fs/384fs/512fs
1
x
256fs
8kHz
～
12kHz
Table 2. Relationship among fs, MCLK frequency and S/N of HP-amp and MOUT
BICK (MHz)
64fs
0.512
0.7056
0.768
1.024
1.4112
1.536
2.048
2.8224
3.072
512fs
4.096
5.6448
6.144
8.192
11.2896
12.288
16.384
22.5792
24.576
S/N (fs=8kHz, A-weighted)
HP-amp
56dB
75dB
92dB
Default
DFS1
DFS0
fs
MCLK
MOUT
56dB
75dB
90dB
512fs
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4368EG | DAC with built-in PLL & HP-AMP |
| AK4370 | 24-Bit 2ch DAC with HP-AMP & Output Mixer |
| AK4370VN | 24-Bit 2ch DAC with HP-AMP & Output Mixer |
| AK4371 | DAC with built-in PLL & HP-AMP |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4367VNP-L | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述: |
| AK4368 | 制造商:AKM 制造商全稱:AKM 功能描述:PLL & HP-AMP DAC |
| AK4368192D | 制造商:ACCUTEK 制造商全稱:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:65,536 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
| AK4368192G | 制造商:ACCUTEK 制造商全稱:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:65,536 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
| AK4368192S | 制造商:ACCUTEK 制造商全稱:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:65,536 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
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