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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 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 183K |
| 代理商： | RF2890 |
8-415
RF2890
Rev A4 040421
Pin
15
16
Function
CDMA IF-
CDMA IF+
Type Description
AO
CDMA IF output. Open collector.
AO
CDMA IF output. Open collector.
Interface Schematic
See pin 16.
17
18
GPS IF-
GPS IF+
AO
AO
GPS IF output. Open collector.
See pin 18.
GPS IF output. Open collector.
19
ISET2
AO
Resistor to ground sets mixer currents in both bands. Higher
resistance results in lower currents.
Resistor to ground sets the LNA current in boost mode (both
LNAs). Higher resistance results in lower current.
Cellular mixer RF single-end input. Externally matched to 50
.
20
ISET1
AO
21
CELL MIX
IN
AI
22
23
NC
No connection.
DIV SEL
DI
Logic input. Logic low enables LO divide-by-2 in cellular
mode, DIV SEL must be set high in GPS mode. See VCO
options table.
24
ENABLE
DI
Logic input. Low level powers down the IC.
Pkg
Base
GND
P
Ground connection. The backside of the package should be
soldered to a top side ground pad which is connected to the
ground plane with multiple vias.
Legend:
DI=Digital Input from Baseband Chip
AI=Analog Input
AO=Analog Output
P=V
CC
or GND
CDMA IF+
CDMA IF-
GPS IF+
GPS IF-
CELL MIX IN
DIV SEL
ENABLE
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