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參數(shù)資料
| 型號(hào)： | RF2381PCBA |
| 廠商： | RF Micro Devices, Inc. |
| 英文描述： | PCS/CELLULAR TDMA/CDMA/W-CDMA LINEAR VARIABLE GAIN AMPLIFIER |
| 中文描述： | 個(gè)人通訊/蜂窩時(shí)分多址/碼分多址/的W - CDMA線性可變?cè)鲆娣糯笃?/td> |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大?。?/td> | 102K |
| 代理商： | RF2381PCBA |
4-46
RF2381
Rev A1 010511
4
G
A
Application S chematic
1850 MHz to 1910MHz
Pin
1
Function
RF OUT
Description
RF output pin. This pin is DC-coupled and requires V
CC
through a bias
inductor sized accordingly to provide a high pass transformation with a
series capacitor.
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
Analog gain control pin. This pin controls the gain of the IC. Minimum
gain occurs at V
GC
<0.4V and maximum gain is achieved with
V
GC
=2.0V. 50dB of linear gain control with little variation of input P
1dB
is available.
RF input pin. This pin is DC-coupled.
Interface Schematic
2
GND
3
GC
4
5
RF IN
GND
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
Power supply. This pin should be connected to a regulated supply and
requires a series inductor and bypass capacitor. Voltage is supplied
through this pin to the first stage collector; this voltage also controls the
bias. Gain may be tuned by adjusting the value of the feed inductor.
6
VCC
RF IN
4
5
6
3
2
1
Note orientation of
package in this schematic.
1 pF
GC
2.7 nH
33 nF
VCC
RF OUT
2.7 nH*
33 nF
VCC
ATT
ATT
100 pF
33 pF
*For W-CDMA, use 2.2 nH
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