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參數(shù)資料
| 型號： | RF2451 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 衰減器 |
| 英文描述： | 3V LOW NOISE AMPLIFIER |
| 中文描述： | 700 MHz - 2000 MHz RF/MICROWAVE WIDE BAND LOW POWER AMPLIFIER |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 81K |
| 代理商： | RF2451 |
4-249
RF2451
Rev A8 000822
4
G
A
NOT FOR NEWDESIGNS
SeeUpgradedProductRF2371
Pin
1
Function
RF OUT
Description
RF output pin. Bias for the LNA is provided through this pin, hence it
should be connected to VCC through an inductor.
This pin sets the current for the device. A resistor to ground of 1k
pro-
vides a current of 17.5mA. The condition for optimal IP3 is to use the
internal current setting option and leave this pin open (no connect).
Power supply for the bias circuits.
Interface Schematic
2
ISET
3
4
VCC
ENABLE
Power down control. This is a CMOS input. When this pin is CMOS
“high” the device is enabled. When the level is CMOS “l(fā)ow” the device
is shut off and a controlled attenuator is turned on.
the external current setting when this pin is CMOS level “high”. The cur-
rent is set to 2.8mA using the internal current setting, and can be up to
20mA using the external current setting.
Ground connection for the bias circuits.
5
IPSET
6
7
GND2
GND1
Ground connection for the LNA. Keep traces physically short and con-
nect immediately to ground plane for best performance.
RF input pin. This pin is not internally DC blocked and requires an
external blocking capacitor.
8
RF IN
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