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參數(shù)資料
| 型號： | RF2449 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | CDMA/FM LOW NOISE AMPLIFIER/MIXER 900MHZ DOWNCONVERTER |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT |
| 封裝： | SSOP-24 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 288K |
| 代理商： | RF2449 |
Preliminary
8-78
RF2449
Rev A4 001016
8
F
Pin
1
Function
ENABLE
Description
This pin is used to enable or disable the RF2449. A logic high (>2.0V)
enables the circuitry. A logic low (<1.0V) disables the circuitry.
Interface Schematic
2
IP SET
Controls the setting of the LNA current. A logic low (<1.0V) selects the
internal resistance (49.5k
), resulting in an LNA current of 3.5mA. A
logic high (>2.0V) selects the external resistance at pin 12.
3
IF SEL
Determines which IF port is active. A logic low (<1.0V) activates IF1
and deactivates IF2. A logic high (>2.0V) activates IF2 and deactivates
IF1.
4
LNA GAIN
Controls the bypass feature of the LNA. A logic low (<1.0V) selects the
bypass mode. A logic high (>2.0V) turns on the LNA.
5
MIX GAIN
Controls the bypass feature of the mixer pre-amp. A logic low (<1.0V)
selects the bypass mode. A logic high (>2.0V) turns on the pre-amp.
6
LNA IN
LNA input pin.
7
8
9
10
11
VCC1
GND1B
GND1A
LNA OUT
ISET2
VCC pin for all circuits except the LO.
LNA ground pin.
See pin 6.
Package ground pin.
LNA output pin.
See pin 6.
An external resistor connected to this pin sets the current of the pre-
amp and the mixer.
An external resistor connected to this pin sets the current of the LNA
when IP SET is high (see pin 2).
Ground pin for pre-amp circuit.
12
ISET1
13
GND3B
14
15
16
MIX IN
GND3A
IF1+
Mixer pre-amp input pin.
See pin 13.
Ground pin for the mixer circuits.
First differential output pin for the first mixer.
ENABLE
IP SET
IF SEL
LNA GAIN
MIX GAIN
MIX GAIN
LNA OUT
GND1B
MIX IN
GND3B
VCC2
IF1-
IF1+
相關PDF資料 |
PDF描述 |
|---|---|
| RF2451 | 3V LOW NOISE AMPLIFIER |
| RF2456 | CDMA/FM DOWNCONVERTER |
| RF2459 | 3V PCS DOWNCONVERTER |
| RF2460 | PCS CDMA LOW NOISE AMPLIFIER/MIXER 1500MHZ TO 2200MHZ DOWNCONVERTER |
| RF2461 | CDMA/FM LOW NOISE AMPLIFIER/MIXER 900MHZ DOWNCONVERTER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| RF2450 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| RF2451 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:3V LOW NOISE AMPLIFIER |
| RF2454 | 制造商:International Rectifier 功能描述: |
| RF2456 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:CDMA/FM DOWNCONVERTER |
| RF2459 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:3V PCS DOWNCONVERTER |
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