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參數(shù)資料
| 型號： | CGS702V |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 時(shí)鐘及定時(shí) |
| 英文描述： | Commercial Low Skew PLL 1 to 9 CMOS Clock Driver with Improved EMI |
| 中文描述： | 702 SERIES, PLL BASED CLOCK DRIVER, 9 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 181K |
| 代理商： | CGS702V |
EMI Characteristics and Measurements for CGS702
MEASURING THE SPECTRAL CONTENT OF A LOGIC IC
In order to analyze the frequency, or spectral content of
logic ICs, two measurement techniques have been devel-
oped. One method, The Radiated Measurement Method, is
based on the system-level FCC certification test methodolo-
gy, FCC Open Site Test (OST) 55. The radiated method
utilizes a multilayer PCB with the IC-under-test is mounted
on a grounded, adjustable table placed 3 meters from an
antenna mast (seeFigure 3). The IC’s input is stimulated by
a known periodic waveform and its output drives a typical
PCB microstrip. The 75
X
microstrip is properly terminated
to prevent reflections from affecting the IC’s spectral con-
tent results.
The FCC certification test method is anopen field measure-
ment procedure. Therefore, the spectral content of the de-
vice-under-test (in this case, an IC) cannot be detected be-
low the ambient level of radiation. The test-site is perma-
nent and the average ambient noise level remains relatively
constant.
The CGS700 and CGS702 were tested for EMI using the
above method. A comparison of the EMI results in the form
of spectral content is shown in Figures 4 and 5.
For more details on EMI, see Application Note AN-831.
Screen Room with 120 dB Shielding
TL/F/12386–9
FIGURE 3. Radiated EMI Measurement Method
7
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CGS703U013W5C1PH | 制造商:Mallory 功能描述:CGCE013X370 |
| CGS703U016V4C | 功能描述:鋁質(zhì)電解電容器-螺旋式接線端 68000uF 16V-10+75% RoHS:否 制造商:Cornell Dubilier 電容:2400 uF 容差:- 10 %, + 50 % 電壓額定值:450 V ESR:38 mOhms 工作溫度范圍:- 40 C to + 85 C 系列:CGS 直徑:76 mm (3 in) 長度:143 mm (5.625 in) 引線間隔:31.75 mm (1.25 in) 產(chǎn)品:Computer Grade Electrolytic Capacitors |
| CGS703U025X4C | 功能描述:鋁質(zhì)電解電容器-螺旋式接線端 70000uF 25V-10+75% RoHS:否 制造商:Cornell Dubilier 電容:2400 uF 容差:- 10 %, + 50 % 電壓額定值:450 V ESR:38 mOhms 工作溫度范圍:- 40 C to + 85 C 系列:CGS 直徑:76 mm (3 in) 長度:143 mm (5.625 in) 引線間隔:31.75 mm (1.25 in) 產(chǎn)品:Computer Grade Electrolytic Capacitors |
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