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參數(shù)資料
| 型號： | MAX2620EUA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 10MHz to 1050MHz Integrated RF Oscillator with Buffered Outputs |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PDSO8 |
| 封裝： | MICRO, MAX-8 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 105K |
| 代理商： | MAX2620EUA |
M
10MHz to 1050MHz Integrated
RF Osc illator with Buffered Outputs
10
______________________________________________________________________________________
(see Typical Operating Circuit as small a value as pos-
sible while still maintaining desired frequency and tun-
ing range to maximize loaded Q.
There are many good references on the topic of oscilla-
tor design. An excellent reference is “The Oscillator
as a Reflection Amplifier, an Intuitive Approach to
Oscillator Design,” by J ohn W. Boyles, Microwave
J ournal J une 1986, pp. 83–98.
Output Matc hing Configuration
Both of the MAX2620’s outputs (OUT and
OUT
) are
open collectors. They need to be pulled up to the sup-
ply by external components. An easy approach to this
pull-up is a resistor. A 50
resistor value would inher-
ently match the output to a 50
system. The Typical
Operating Circuit shows
OUT
configured this way.
Alternatively, a choke pull-up (Figure 1), yields greater
output power (approximately -8dBm at 900MHz).
When maximum power is required, use an inductor as
the supply pull-up, and match the inductor’s output
impedance to the desired system impedance. Table 1
in the Typical Operating Characteristics shows recom-
mended load impedance presented to OUT and
OUT
for maximum power transfer. Using this data and stan-
dard matching-network synthesis techniques, a match-
ing network can be constructed that will optimize power
output into most load impedances. The value of the
inductor used for pull-up should be used in the synthe-
sis of the matching network.
1
2
3
4
8
7
6
5
OUT
VCC2
GND
OUT
SHDN
FDBK
TANK
VCC1
MAX2620
μ
MAX
TOP VIEW
__________________Pin Configuration
MAX2620
C5
C6
R
p
L1
R
n
C3
INDUCTOR
OR
CERAMIC
RESONATOR
VARACTOR+
COUPLING
TEST PORT
MEASUREMENT
(FIGURE 1)
RESONANT TANK MODEL
MAX2620 PACKAGE MODEL
PCB
PARASITICS
C4
C
04
2.4pF
C
03
2.4pF
C17
C
D1
C
STRAY
Figure 5. Electrical Model of MAX2620 Circuit
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX2620EUA+ | 功能描述:VCO振蕩器 10MHz - 1050MHz RF Oscillator RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負載電容: 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 |
| MAX2620EUA+T | 功能描述:VCO振蕩器 10MHz - 1050MHz RF Oscillator RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負載電容: 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 |
| MAX2620EUA-T | 功能描述:VCO振蕩器 10MHz - 1050MHz RF Oscillator RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負載電容: 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 |
| MAX2620EVKIT | 功能描述:時鐘和定時器開發(fā)工具 MAX2620 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類型:Clock Conditioners 工具用于評估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V |
| MAX2622EUA | 功能描述:VCO振蕩器 855MHz - 881MHz Mono V Ctrld Osc RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負載電容: 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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