參數(shù)資料
型號: RF2336
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: SOT-23, 5 PIN
文件頁數(shù): 3/4頁
文件大?。?/td> 40K
代理商: RF2336
4-153
RF2336
Rev A3 001201
4
G
A
Evaluation Board S chematic
(Download Bill of Materials from www.rfmd.com.)
Pin
1
Function
GND
Description
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane for best performance.
Same as pin 1.
Interface Schematic
2
3
GND
RF IN
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.
Same as pin 1.
4
5
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 75mA 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 3.6V 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.
R
V
I
CC
(
)
RF OUT
RF IN
1
2
3
5
4
C2
100 pF
C1
100 pF
50
μ
strip
50
μ
strip
J2
RF OUT
J1
RF IN
L1
100 nH
R1
22
VCC
P1-1
C3
100 pF
C4
1
μ
F
233X410-
P1
1
2
3
P1-1
VCC
GND
NC
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