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參數(shù)資料
| 型號： | MC100EL1648DTR2 |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OSC VCO 1.1GHZ 8TSSOP |
| 產(chǎn)品變化通告： | Product Discontinuation 20/Aug/2008 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | 100EL |
| 類型： | VCO |
| 頻率： | 1.1GHz |
| 電源電壓： | 4.2 V ~ 5.5 V |
| 電流 - 電源： | 19mA |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 供應(yīng)商設(shè)備封裝： | 8-TSSOP |
| 安裝類型： | 表面貼裝 |
| 其它名稱： | MC100EL1648DTODKR |
MC100EL1648
http://onsemi.com
8
FIXED FREQUENCY MODE
The MC100EL1648 external tank circuit components are
used to determine the desired frequency of operation as
shown in Figure 8, tank option #2. The tank circuit
components have direct impact on the tuning sensitivity, IEE,
and phase noise performance. Fixed frequency of the tank
circuit is usually realized by an inductor and capacitor (LC
network) that contains a high Quality factor (Q). The plotted
curve indicates various fixed frequencies obtained with a
single inductor and variable capacitor. The Q of the
components in the tank circuit has a direct impact on the
resulting phase noise of the oscillator. In general, when the
Q is high the oscillator will result in lower phase noise.
Figure 8. Fixed Frequency LC Tank
FREQUENCY
(MHz)
CAPACITANCE (pF)
470
370
270
170
70
30
0.3
300
500
1000
2000
10000
Measured Frequency (MHz)
Calculated Frequency (MHz)
570
0
0.1 mF
C
L
8 (10)
1 (12)
4 (3)
VCC
3 (1)
2 (14)
Test
Point
FOUT
Tank #2
5 (5)
6 (7) 7 (8)
VEE
0.1 mF 0.1 mF
0.01 mF
100 mF
0.1 mF
Note 1 Capacitor for tank may be variable type.
(See Tank Circuit #3.)
Note 2 Use high impedance probe (> 1 MW ).
L = Micro Metal torroid #T2022, 8 turns #30
Enameled Copper wire (@ 40 nH)
C = 3.035 pF Variable Capacitance (@ 10 pF)
8 pin (14 pin) lead package
QL ≥ 100
Only high quality surfacemount RF chip capacitors
should be used in the tank circuit at high frequencies. These
capacitors should have very low dielectric loss (highQ). At
a minimum, the capacitors selected should be operating at
100 MHz below their series resonance point. As the desired
frequency of operation increases, the values of the tank
capacitor will decrease since the series resonance point is a
function of the capacitance value. Typically, the inductor is
realized as a surfacemount chip or a wound coil. In
addition, the lead inductance and board inductance and
capacitance also have an impact on the final operating point.
The following equation will help to choose the appropriate
values for your tank circuit design.
f0 +
1
2p
LT *CT
Where
LT = Total Inductance
CT = Total Capacitance
inductance/capacitance versus frequency with one known
tank component. This helps the designer of the tank circuit
to choose desired value of inductor/capacitor component for
the wanted frequency. The lead inductance and board
inductance and capacitance will also have an impact on the
tank component values (inductor and capacitor).
Figure 9. Capacitor Value Known (5 pF)
Inductance vs. Frequency with 5 pF Cap
5
10
15
20
25
30
35
40
45
50
0
700
1000
1300
160
400
FREQUENCY (MHz)
INDUCT
ANCE
(nH)
Figure 10. Inductor Value Known (4 nH)
Capacitance vs. Frequency with 4 nH Inductance
5
10
15
20
25
30
35
40
45
50
0
700
1000
1300
160
400
FREQUENCY (Hz)
CAP
ACIT
ANCE
(F)
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| MC100EL1648DTR2G | 功能描述:VCO振蕩器 BBG ECL Low PWR VCO RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負(fù)載電容: 封裝:Reel 電源電壓:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作溫度:0 C 最大工作溫度:+ 70 C |
| MC100EL1648M | 功能描述:VCO振蕩器 5V ECL VCO RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負(fù)載電容: 封裝:Reel 電源電壓:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作溫度:0 C 最大工作溫度:+ 70 C |
| MC100EL1648MEL | 功能描述:VCO振蕩器 5V ECL VCO RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負(fù)載電容: 封裝:Reel 電源電壓:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作溫度:0 C 最大工作溫度:+ 70 C |
| MC100EL1648MELG | 功能描述:VCO振蕩器 BBG ECL LOW PWR VDO RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負(fù)載電容: 封裝:Reel 電源電壓:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作溫度:0 C 最大工作溫度:+ 70 C |
| MC100EL1648MG | 功能描述:VCO振蕩器 BBG ECL Low PWR VCO RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負(fù)載電容: 封裝:Reel 電源電壓:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作溫度:0 C 最大工作溫度:+ 70 C |
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