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參數(shù)資料
| 型號： | ACPM-7311-TR1 |
| 元件分類： | 放大器 |
| 英文描述： | 824 MHz - 849 MHz RF/MICROWAVE NARROW BAND LOW POWER AMPLIFIER |
| 封裝： | 4 X 4 MM, 1.10 MM HEIGHT, ROHS COMPLIANT PACKAGE-10 |
| 文件頁數(shù)： | 18/18頁 |
| 文件大小： | 1002K |
| 代理商： | ACPM-7311-TR1 |
9
CoolPAM
Avago Technologies’ CoolPAM is stage-bypass PA tech-
nology which saves more power compared with conven-
tional PA. With this technology, the ACPM-7311 has very
low quiescent current and efficiencies at low and medium
output power ranges are very high.
Incorporation of bias circuit
The ACPM-7311 has internal bias circuit, which removes
the need for external constant voltage source (LDO). PA
on/off is controlled by Ven. This is digitally control pin.
3-mode power control with two mode control pins
The ACPM-7311 supports three power modes (low power
mode/mid power mode/high power mode) with two
mode control pins (Vmode0 and Vmode1). This control
scheme enables the ACPM-7311 to save more power,
which accordingly gives extended talk time.
PDF (probability density function) in Figure 15 showing
distribution of output power of mobile in real field gives
motivation for stage-bypass PA. Output power is less
than 16dBm for most of operating time (during talking),
so it is important to save power consumption at low and
medium output power ranges
Average current & Talk time
Average current consumed by PA can be calculated by
summing up current at each output power weighted
with probability. So it is expressed with integration of
multiplication of current and probability at each output
power.
Average current = ∫ (PDF x Current)dp
Talk time is extended more as average current consump-
tion is lowered.
Mode control pins
Vmode0 and Vmode1 are digitally controlled pins and
they control operating mode of PA and truth table is sum-
marized in table 3. These pins do not require constant
voltage for interface, but high voltage input range is 1.9
though 2.9V
Application on mobile board
Figure 16 shows one application example on mobile
board. C4 and C5 should be placed nearby pin5 and
pin6. Transmission line length after PA output should be
minimized to reduce conduction loss.
C7
C8
BB
C3
L1
output matching circuit
ACPM-7311
PA_R1
PA_R0
PA_ON
Ven
Vmoce0
Vmode1
IN
Vc1
GND
OUT
GND
Vcc2
C2
TX filter
RF In
Coupler
RF Out
C1
C9
C6
V
BATT
C4
C5
Figure 15. PDF and Current
Figure 16. Peripheral Circuits
Load Insensitivity
With the trend to remove the isolator from the Tx chain
in UMTS handsets, the performance demands of Load
Insensitivity become dependent on the combined per-
formance of the remaining elements in the TX chain: the
power amplifier, coupler, antenna as well as the physical
layout on the phone board. The ACPM-7311, as part of
optimized design, meets the necessary linearity require-
ments over a 4:1 VSWR mismatch at the antenna plane.
In the case of the ACPM-7311, the output stage has been
designed for slightly higher Pout to provide the necessary
margin to meet linearity under the mismatch experienced
at the PA output port resulting from the forced antenna
mismatch. Documentation is available that provides a
more complete description of the system considerations
and measurement considerations.
To illustrate the system performance using the ACPM-
7311, Figure 17 shows measurement of TX chain with
VSWR fixed at 4:1. ACLR1 is kept higher than -38dBc over
all phases and gain variance is about 2dB.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ACPM-7312-BLK | 功能描述:射頻放大器 UMTS PA Module Band 5 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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 封裝:Reel |
| ACPM-7312-TR1 | 功能描述:射頻放大器 UMTS PA Module Band 5 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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 封裝:Reel |
| ACPM-7331-BLK | 功能描述:射頻放大器 UMTS1900 Power Amp Module 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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 封裝:Reel |
| ACPM-7331-BLKR | 功能描述:射頻放大器 UMTS1900 Power Amp Module 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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 封裝:Reel |
| ACPM-7331-OR1 | 功能描述:射頻放大器 UMTS1900 Power Amp Module 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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 封裝:Reel |
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