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參數(shù)資料
| 型號： | RF3375 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 衰減器 |
| 英文描述： | GENERAL PURPOSE AMPLIFIER |
| 中文描述： | 0 MHz - 6000 MHz RF/MICROWAVE WIDE BAND LOW POWER AMPLIFIER |
| 封裝： | ROHS COMPLIANT, SOT-89, 3 PIN |
| 文件頁數(shù)： | 3/8頁 |
| 文件大?。?/td> | 139K |
| 代理商： | RF3375 |
4-593
RF3375
Rev A6 050310
Pin
1
Function
RF IN
Description
RF input pin. This pin is NOT internally DC blocked. A DC blocking
capacitor, suitable for the frequency of operation, should be used in
most applications. DC coupling of the input is not allowed, because this
will override the internal feedback loop and cause temperature instabil-
ity.
Ground connection.
Interface Schematic
2
3
GND
RF OUT
RF output and bias pin. Biasing is accomplished with an external series
resistor and choke inductor to V
CC
. The resistor is selected to set the
DC current into this pin to a desired level. The resistor value is deter-
mined by the following equation:
V
(
-------------------------–
=
Care should also be taken in the resistor selection to
ensure that the
current into the part never exceeds 80mA over the planned oper-
ating temperature
. This means that a resistor between the supply and
this pin is always required, even if a supply near 5.0V is available, to
provide DC feedback to prevent thermal runaway. Because DC is
present on this pin, a DC blocking capacitor, suitable for the frequency
of operation, should be used in most applications. The supply side of
the bias network should also be well bypassed.
Ground connection.
4
GND
R
V
I
CC
)
RF IN
RF OUT
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