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參數(shù)資料
| 型號： | μPG138GV |
| 廠商： | NEC Corp. |
| 英文描述： | L-Band SPDT Switch(單刀雙擲開關(guān)) |
| 中文描述： | L波段單刀雙擲開關(guān)（單刀雙擲開關(guān)） |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 64K |
| 代理商： | ΜPG138GV |
6
P
PG138GV
Floating the
P
PG138GV
It is possible to use the
P
PG138GV with only a single +3 V supply by employing a technique known as “floating”.
When the IC is floated using a +3 V supply, the voltage levels used to control the switch are elevated above ground
by +3 V.
When the
P
PG138GV is floated it is necessary to use DC blocking (C2, C3, C5) and grounding (C1, C4)
capacitors. This enables the IC to isolated so that +3 V can be applied to RF line. The value for DC blocking
capacitors should be chosen to accommodate the frequency of operation. Grounding capacitors are required to float
the IC above ground. The value for grounding capacitor should be chosen to accommodate the frequency of
operation.
It is not recommended to float the
P
PG138GV for wide band application.
(Floating the
P
PG138GV with +3 V/0 V supply at 2 GHz-band, BW
d
50 MHz)
C1
GND
C2
OUT2
V
CONT2
4
1
5
8
V
CONT1
OUT1
C5
C3
C4
GND
IN
PIN CONNECTIONS
1. V
CONT2
2. OUT2
3. GND
4. GND
5. IN
6. GND
7. OUT1
8. V
CONT1
C1, C4 = 10 pF below
C2, C3, C5 = 100 pF
: Grounding capacitor
: DC blocking capacitor
The distance between grounding capacitor and IC’s GND pins, grounding capacitor and ground of the substrate
should be as shorter as possible to avoid the parasitic parameters. IC’s GND pin, No. 3, No. 4 and No. 6 are
connected inside of the IC.
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