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參數(shù)資料
| 型號： | RF2498 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | TRI-BAND/QUAD-MODE CDMA/GPS LOW NOISE AMPLIFIER/MIXER |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQCC32 |
| 封裝： | 5 X 5 MM, PLASTIC, QFN-32 |
| 文件頁數(shù)： | 9/20頁 |
| 文件大?。?/td> | 723K |
| 代理商： | RF2498 |
8-309
RF2498
Rev A3 030711
Pin
1
Function
GPS+
Type Description
AO
GPS IF output. Open collector.
Interface Schematic
2
3
GPS-
CDMA+
AO
AO
GPS IF output. Open collector.
See pin 1.
CDMA IF output. Open collector.
4
5
CDMA-
FM+
AO
AO
CDMA IF output. Open collector.
See pin 3.
FM IF output. Open collector. “Current combiner” IF interface
to SAW filter recommended. (See “IF Output Matching Net-
work” section.)
6
FM-
AO
FM IF output. Open collector. “Current combiner” IF interface
to SAW filter recommended. (See “IF Output Matching Net-
work” section.)
VCC connection for internal LO amplifiers. Internal RF bypass
capacitor. External bypass capacitor between 1nF and 47nF
required.
LO single-end input. Matched to 50
.
See pin 5.
7
VCC2
P
8
LO IN
AI
9
10
LO OUT
/2 SELECT
AO
DI
LO output. Internal DC block.
Logic input. Low enables /2 circuitry in cellular mode.
The divider is disabled when BAND SEL (pin 27) is high,
regardless of the state of pin 10. The divider can only be
enabled when BAND SEL is low and pin10 is low. Pin 10 can
be tied to a low state allowing BANDSEL (pin 27) to control the
LO divider function, if using a single LO input source.
Logic input. High enables TX LO output buffer amplifiers.
See pin 11.
11
TX BUFF
ENABLE
DI
12
PCS RFA
VCC
PCS MIX IN
P
VCC connection for PCS mixer preamplifier.
13
AI
PCS mixer RF single-end input.
14
CELL MIX
IN
AI
Cellular mixer RF single-end input. Matched to 50
.
GPS+
GPS-
CDMA+
CDMA-
FM+
FM-
LO IN
70
TX BUF
PCS MIX IN
CELL MIX IN
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| RF2498_07 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:TRI-BAND/QUAD-MODE CDMA/GPS LOW NOISE AMPLIFIER/MIXER |
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