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參數(shù)資料
| 型號(hào)： | RF2890 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 衰減器 |
| 英文描述： | DUAL-BAND CDMA CELLULAR/GPS LOW NOISE AMPLIFIER/MIXER |
| 中文描述： | 800 MHz - 900 MHz RF/MICROWAVE WIDE BAND LOW POWER AMPLIFIER |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, PLASTIC, QFN-24 |
| 文件頁(yè)數(shù)： | 6/14頁(yè) |
| 文件大?。?/td> | 183K |
| 代理商： | RF2890 |
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8-414
RF2890
Rev A4 040421
Pin
1
Function
CELL LNA
OUT
CELL LNA
EMITTER
CELL LNA
IN
Type Description
AO
Cellular LNA output. Simple external L-C components
required for matching and VCC supply.
Interface Schematic
See pin 3.
2
AO
Cellular LNA emitter. A small inductor connects this pin to
ground. Cellular LNA gain can be adjusted by the inductance.
See pin 3.
3
AI
Cellular LNA input.
4
GPS LNA IN
AI
GPS LNA input. For best performance, simple external match-
ing required.
5
VG1
DI
Logic input. See Gain Control Logic table.
6
GPS LNA
OUT
GPS MIX IN
AO
GPS LNA output. Simple external L-C components required
for matching and VCC supply.
See pin 4.
7
AI
GPS mixer RF single-end input. Externally matched to 50
.
8
VG2
DI
Logic input. See Gain Control Logic table.
9
BAND SEL
DI
Logic input. High level selects GPS band; low level selects cel-
lular band.
10
VCC1
P
VCC connection with internal RF bypass capacitor. External
bypass capacitor between 1nF and 47nF recommended.
LO single-end input. Matched to 50
.
11
LO IN
AI
12
VCC2
DI
VCC connection with internal RF Bypass capacitor. External
bypass capacitor between 1nF and 47nF recommended.
LO output. Internal DC block.
13
14
LO OUT
TX BUFF
ENAB
AO
DI
Logic input. High enables TX LO output buffer amplifiers.
CELL LNA IN
V
CC
CELL LNA OUT
CELL LNA EMITTER
GPS LNA IN
V
CC
GPS LNA OUT
VG1
GPS MIX IN
VG2
BAND SEL
LO IN
70
TX BUFF ENAB
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