参数资料
| 型号： | EL4585CSZ |
| 厂商： | Intersil |
| 文件页数： | 15/15页 |
| 文件大小： | 0K |
| 描述： | IC PLL VIDEO GP 36MHZ 16-SOIC |
| 标准包装： | 47 |
| 类型： | 锁相环路（PLL） |
| PLL： | 是 |
| 输入： | CMOS，TTL |
| 输出： | CMOS，TTL |
| 电路数： | 1 |
| 比率 - 输入:输出： | 3:1 |
| 差分 - 输入:输出： | 无/无 |
| 频率 - 最大： | 36MHz |
| 除法器/乘法器： | 是/无 |
| 电源电压： | 5V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 1247 (CN2011-ZH PDF) |
9
FN7175.4
September 3, 2009
positive when EXT DIV lags HSYNC.) The resistance needed
will depend on VCO design or VCXO module selection.
Applications Information
Choosing External Components
1. To choose LC VCO components, first pick the desired
operating frequency. For our example we will use
28.636MHz, with an HSYNC frequency of 15.734kHz.
2. Choose a reasonable inductor value (1 to 5H works
well). We choose 3.3H.
3. Calculate CT needed to produce FOSC.
4. From the varactor data sheet find CV @ 2.5V, the desired
lock voltage. CV=23pF for our SMV1204-12 for example.
5. C2 should be about 10CV, so we choose C2=220pF for
our example.
6. Calculate C1. Since:
then:
For our example, C1=17pF. (A trim capacitor may be used
for fine tuning.) Examples for each frequency using the
internal divider is shown in Figure 8.
Typical Application
Horizontal genlock provides clock for an analog-to-digital
converter, digitizing analog video.
The oscillators are arranged as Colpitts oscillators
(see Figure 8), and the structure is redrawn here to emphasize
the split capacitance used in a Colpitts oscillator. It should be
noted that this oscillator configuration is just one of literally
hundreds possible, and the configuration shown here does not
necessarily represent the best solution for all applications.
Crystal manufacturers are very informative sources on the
design and use of oscillators in a wide variety of applications,
and the reader is encouraged to become familiar with them.
LC VCO COMPONENT VALUES (APPROXIMATE) (Note)
FREQUENCY
(MHz)
L1
(H)
C1
(pF)
C2
(pF)
26.602
3.3
22
220
27.0
3.3
21
220
29.5
2.7
22
220
35.468
2.2
16
220
21.476
4.7
26
220
24.546
3.9
22
220
28.636
3.3
17
220
NOTE: Use shielded inductors for optimum performance.
F
OSC
1
2
π LC
T
-----------------------
=
C
T
1
4
π
2
F
2
L
---------------------
1
4
π
2
28.636e6
2
() 3.3e 6
–
()
-----------------------------------------------------------------------
9.4pF
==
=
(EQ. 1)
C
T
C
1C2CV
C
1 C2
()
C
1CV
()
C
2CV
()
++
--------------------------------------------------------------------------
=
(EQ. 2)
C
1
C
2CT CV
C
2CV
()
C
2CT
()
–
C
TCV
()
–
--------------------------------------------------------------------------
=
(EQ. 3)
FIGURE 8.
TYPICAL LC VCO
XTAL VCO COMPONENT VALUES (APPROXIMATE)
FREQUENCY
(MHz)
R1
(k
Ω)
C1
(pF)
C2
(F)
26.602
300
15
0.001
27.0
300
15
0.001
29.5
300
15
0.001
35.468
300
15
0.001
21.476
300
15
0.001
24.546
300
15
0.001
28.636
300
15
0.001
FIGURE 9.
TYPICAL XTAL VCO
EL4585
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相关代理商/技术参数 |
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| EL4585CSZ-T13 | 功能描述:锁相环 - PLL EL4585CSZ HORIZONTAL GENLOCK RoHS:否 制造商:Silicon Labs 类型:PLL Clock Multiplier 电路数量:1 最大输入频率:710 MHz 最小输入频率:0.002 MHz 输出频率范围:0.002 MHz to 808 MHz 电源电压-最大:3.63 V 电源电压-最小:1.71 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:QFN-36 封装:Tray |
| EL4585CSZ-T7 | 功能描述:锁相环 - PLL EL4585CSZ HORIZONTAL GENLOCK RoHS:否 制造商:Silicon Labs 类型:PLL Clock Multiplier 电路数量:1 最大输入频率:710 MHz 最小输入频率:0.002 MHz 输出频率范围:0.002 MHz to 808 MHz 电源电压-最大:3.63 V 电源电压-最小:1.71 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:QFN-36 封装:Tray |
| EL-484ET | 功能描述:标准LED-通孔 Orange Translucent 625nm 4mcd RoHS:否 制造商:Vishay Semiconductors 照明颜色:Red 光强度:0.7 mcd 波长/色温:615 nm 显示角:45 deg 透镜颜色/类型:Clear, Non-Diffused 正向电流:70 mA 正向电压:1.83 V to 3.03 V LED 大小:2 mm 系列: 封装:Tube |
| EL-484GT | 功能描述:标准LED-通孔 Green Translucent 570nm 8mcd RoHS:否 制造商:Vishay Semiconductors 照明颜色:Red 光强度:0.7 mcd 波长/色温:615 nm 显示角:45 deg 透镜颜色/类型:Clear, Non-Diffused 正向电流:70 mA 正向电压:1.83 V to 3.03 V LED 大小:2 mm 系列: 封装:Tube |
| EL-484IT | 功能描述:标准LED-通孔 HI-EFF RED 625nm 4mcd RoHS:否 制造商:Vishay Semiconductors 照明颜色:Red 光强度:0.7 mcd 波长/色温:615 nm 显示角:45 deg 透镜颜色/类型:Clear, Non-Diffused 正向电流:70 mA 正向电压:1.83 V to 3.03 V LED 大小:2 mm 系列: 封装:Tube |
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