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參數(shù)資料
| 型號： | RMPA1959 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 衰減器 |
| 英文描述： | PCS 3.4V CDMA & CDMA2000-1X PowerEdge Power Amplifier Module |
| 中文描述： | 1850 MHz - 1910 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| 封裝： | 4 X 4 MM, 1.50 MM HEIGHT, LCC-11 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 562K |
| 代理商： | RMPA1959 |
2004 Fairchild Semiconductor Corporation
RMPA1959 Rev. D
R
Efficiency Improvement Application
In addition to high-power/low-power bias modes, the
efficiency of the PA module can be significantly increased
at backed-off RF power levels by dynamically varying the
supply voltage (Vcc) applied to the amplifier. Since mobile
handsets and power amplifiers frequently operate at 10–20
dB back-off, or more, from maximum rated linear power,
battery life is highly dependent on the DC power consumed
at antenna power levels in the range of 0 to +16 dBm. The
reduced demand on transmitted RF power allows the PA
supply voltage to be reduced for improved efficiency, while
still meeting linearity requirements for CDMA modulation
with excellent margin. High-efficiency DC-DC converters
are now available to implement switched-voltage operation.
The following figures show measured performance of the
PA module in low-power mode (Vmode = +2.0V) at
+16dBm output power and over a range of supply voltages
from 3.4V nominal down to 1.2V. Power-added efficiency is
more than doubled from 10 percent to nearly 25 percent
(Vcc = 1.2V) while maintaining a typical ACPR1 of –52dBc
and ACPR2 of less than –61dBc.
Operation at even lower levels of Vcc supply voltage are
possible with a further restriction on the maximum RF
output power. As shown below, the PA module can be
biased at a supply voltage of as low as 0.7V with an
efficiency as high as 10–12 percent at +8dBm output
power. Excellent signal linearity is still maintained even
under this low supply voltage condition.
RMPA1959 PCS 4x4mm2 PAM
Vref = 2.85V, Pout=16dBm
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1840
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Frequency (MHz)
1840
1860
1880
1900
1920
Frequency (MHz)
1840
1860
1880
1900
1920
Frequency (MHz)
1840
1860
1880
1900
1920
Frequency (MHz)
G
Vcc=1.2V
Vcc=1.5V
Vcc=2.0V
Vcc=3.0V
Vcc=3.4V
RMPA1959 PCS 4x4mm2 PAM
Vref = 2.85V, Pout=16dBm
P
Vcc=1.2V
Vcc=1.5V
Vcc=2.0V
Vcc=3.0V
Vcc=3.4V
RMPA1959 PCS 4x4mm2 PAM
Vref = 2.85V, Pout=16dBm
A
Vcc=1.2V
Vcc=1.5V
Vcc=2.0V
Vcc=3.0V
Vcc=3.4V
RMPA1959 PCS 4x4mm2 PAM
Vref = 2.85V, Pout=16dBm
A
Vcc=1.2V
Vcc=1.5V
Vcc=2.0V
Vcc=3.0V
Vcc=3.4V
5
10
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20
25
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-60
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RMPA1959-108 | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| RMPA1963 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:US-PCS CDMA, CDMA2000-1X and WCDMA Power Amplifier Module |
| RMPA1965 | 功能描述:射頻放大器 US-PCS CDMA2000-1X Pwr Edge Amp Mod RoHS:否 制造商:Skyworks Solutions, Inc. 類型:Low Noise Amplifier 工作頻率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 輸出截獲點:37.5 dBm 功率增益類型:32 dB 噪聲系數(shù):0.85 dB 工作電源電壓:5 V 電源電流:125 mA 測試頻率:2.6 GHz 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 封裝:Reel |
| RMPA1965_06 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:US-PCS CDMA, CDMA2000-1X and WCDMA PowerEdge TM Power Amplifier Module |
| RMPA1966 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:WCDMA Band II Power Amplifier Module |
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