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參數(shù)資料
| 型號： | LM9823 |
| 文件頁數(shù)： | 19/20頁 |
| 文件大?。?/td> | 245K |
| 代理商： | LM9823 |
Applications Information
(Continued)
such asADC sampling, and output data bus switching can
potentially affect coincident events such as input signal
sampling or offset DAC settling. One event can interfere
with another by coupling noise on shared resources such
as the supply lines, internal voltage references, or the
silicon substrate.
To optimize the performance of the LM9810/20, Samp-
CLK should be timed so that the input signal hold times do
not coincide with output data switching and ADC clock
transitions. In other words, the rising and falling edges of
SampCLK should not be placed close toADC clock edges
or to output data transitions. SampCLK edges should be
at least 20 ns away from ADC clock edges to avoid
interference between the ADC and the sampler. Samp-
CLK edges should also be placed at least 40 ns after
output data transition times to avoid transition noise cou-
pling.
Figure 11is an example of SampCLK timing that will meet
these requirements at the maximum MCLK frequency of
24 MHz. In Figure 11 SampCLK transitions occur on
MCLK falling edges which will keep them more than 20 ns
away from ADC transitions, and 40 ns after output data
transitions.
L
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM9823A | 制造商:Texas Instruments 功能描述: |
| LM9823CCWM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM9823 3 Channel 48-Bit Color Scanner Analog Front End |
| LM9823CCWMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM9823 3 Channel 48-Bit Color Scanner Analog Front End |
| LM9830 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM9830 36-Bit Color Document Scanner |
| LM9830VJD | 功能描述:視頻模擬/數(shù)字化轉(zhuǎn)換器集成電路 RoHS:否 制造商:Texas Instruments 輸入信號類型:Differential 轉(zhuǎn)換器數(shù)量:1 ADC 輸入端數(shù)量:4 轉(zhuǎn)換速率:3 Gbps 分辨率:8 bit 結構: 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
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