- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385768 > RF2461 (RF MICRO DEVICES INC) CDMA/FM LOW NOISE AMPLIFIER/MIXER 900MHZ DOWNCONVERTER PDF資料下載
參數(shù)資料
| 型號： | RF2461 |
| 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, QCC20 |
| 封裝： | 4 X 4 MM, QFN-20 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 365K |
| 代理商： | RF2461 |
Preliminary
8-126
RF2461
Rev A13 010607
8
F
Pin
1
Function
LNA GAIN
Description
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.
Interface Schematic
2
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.
3
LNA IN
LNA input pin.
4
5
VCC1
GND1B
VCC pin for all circuits except the LO. Buffer/bias circuitry.
LNA emitter. This pin provides the DC path to ground for the LNA. A
lumped element or a transmission line inductor can be placed between
this pin and ground to degenerate the LNA. This will decrease the gain,
increase the IP3, and increase the NF of the LNA. As the value of
inductance is increased, these effects will become more pronounced.
LNA output pin.
6
7
LNA OUT
ISET2
See pin 3.
An external resistor R2 connected to this pin sets the current of the pre-
amp and the mixer.
An external resistor R3 connected to this pin sets the current of the
LNA when IP SET is high (see pin 19).
Ground pin for pre-amp circuit. A 3.3nH inductor is used between pin 9
and ground to degenerate the mixer pre-amp. Degenerating the pre-
amp will reduce the gain, increase the IP3 and affect the pre-amp input
impedance.
8
ISET1
9
GND3B
10
11
12
MIX IN
IF1-
IF1+
Mixer pre-amp input pin.
See pin 9.
Second differential output pin for the first mixer.
See pin 12.
First differential output pin for the first mixer. Open collector. A current
combiner external network performs a differential to single-ended con-
version and sets the output impedance. A DC blocking cap must be
present if the IF filter input has a DC path to ground. Mixer (IF2+ and
IF-) needs to “see” a differential impedance between 2k
to 4k
.
13
14
BYPASS
IF2-
Bypass pin for the LO bias reference.
Second differential output pin for the second mixer.
See pin 15.
LNA GAIN
MIX GAIN
LNA IN
LNA OUT
GND1B
MIX IN
GND3B
VCC2
IF1-
IF1+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RF2466 | 3V CDMA/FM MIXER |
| RF2469 | W-CDMA AND PCS LOW NOISE AMPLIFIER/MIXER DOWNCONVERTER |
| RF2472 | 2.4GHZ LOW NOISE AMPLIFIER WITH ENABLE |
| RF2475 | DUAL-BAND LOW NOISE AMPLIFIER/MIXER WITH FREQUENCY DOUBLER |
| RF2480 | DIRECT QUADRATURE MODULATOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RF2461_06 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:CDMA/FM LOW NOISE AMPLIFIER/MIXER 900MHz DOWNCONVERTER |
| RF2461_1 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:CDMA/FM LOW NOISE AMPLIFIER/MIXER 900MHz DOWNCONVERTER |
| RF2461PCBA-41X | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:CDMA/FM LOW NOISE AMPLIFIER/MIXER 900MHz DOWNCONVERTER |
| RF2462-000 | 功能描述:可復(fù)位保險絲 RoHS:否 制造商:Bourns 電流額定值: 電阻:7.5 Ohms 最大直流電壓: 保持電流:0.1 A 安裝風(fēng)格:SMD/SMT 端接類型:SMD/SMT 跳閘電流:0.6 A 引線間隔: 系列:MF-PSHT 工作溫度范圍:- 40 C to + 125 C |
| RF2464 | 制造商: 功能描述: 制造商:undefined 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。