【无线射频芯片】-射频功率放大器选择指南

1/1Maxim无线/射频功率放大器选择指南本文概括了Maxim针对蜂窝、PCS、802.11b、无绳电话以及Bluetooth等应用供应的射频(RF)功率放大器(PA)。列出了工作电压、电源电流、输出功率、封装、功效等参数的对比表，并给出了MaximPAIC的特点。另外，还供应了一个依据市场应用选择的参考表。

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更多信息请查询：快速扫瞄MAX2240数据资料

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更多信息请查询：快速扫瞄MAX2267/MAX2268/MAX2269数据资料

更多信息请查询：快速扫瞄MAX2320/MAX2321/MAX2322/MAX2324/MAX2326/MAX2327数据资料

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更多信息请查询：应用技术支持

Maxim的RF功率放大器即可应用于线性调制，如QAM和QPSK，也可用于非线性调制，如：FM、FSK等。针对TDMA市场设计的PA在性能上有所改进，如：自动斜率掌握可减小频谱集中，自动斜率掌握有助于保持Vcc的稳定、降低VCO牵引。自动热爱护功能能够依据需要临时减小输出功率，供应一个结实、耐用的PA。针对CDMA市场推出的PA能够在城市或远郊CDMA环境下、对于大多数便携终端要求的输出功率电平供应更低的电源电流，CDMAPA在大多数时间工作在较低的输出功率状态。

对于2.4GHzISM应用，如：802.11bWLAN、Bluetooth、HomeRF及无绳电话，Maxim可供应低成本、超小尺寸(如UCSP封装)的功率放大器，这些PA具有模拟或数字的功率掌握、闭环功率掌握、动态偏置掌握、集成检测器等，并具有较高的效率。

以下列出了采纳硅双极型工艺设计的RF功率放大器关键特性：

低成本，这一点得益于它较高的管芯产量和简洁的器件制作工艺(与超外差器件相比)

小尺寸，采纳UCSP封装和较少的外部元件

无需负偏置电源，不同于大多数GaAs放大器

在全温范围和负载变化范围内供应稳定的器件特性

自动斜率掌握

下表列出了我们的一些功率放大器及其性能，留意，有几款PA需要在指定的性能参数和中心频点进行重新调谐，与表中参数有差异。

表1.选择指南:型号列表

PartVcc

(V)Icc

(mA)Frequency

(MHz)Pout

(dBm)ClassPackagePAE

(full)PAE

(derated)Features

MAX22352.7to5.520idle

610full800to1000+30.3C20-Pin

TSSOP-EP47%22%

+24dBmAnalogGainControl,AutoPowerRamp,Shutdown

MAX24303.0to5.552800to1000+21.4AB16-Pin

SO/QSOP24%NAPowerControl,Shutdown,DrivesMAX2601/02

MAX26012.7to5.5450DCto1000+30.0AB/C8-Pin

PSOPII54%18%

+20dBmPowerTransistor

MAX26022.7to5.5450DCto1000+30.0AB/C8-Pin

PSOPII54%18%

+20dBmPowerTransistorwithOn-ChipBiasDiode,PowerRamp,Shutdown

MAX22642.7to5.034idle,

58avg,

95full824to849+28.0AB16-Pin

TSSOP-EP32%12%

+16dBmIS-98CDMAU.S.,InternalSwitch,

Smallest,MostEconomicalSolution

MAX22652.7to5.083full824to849+28.0AB16-Pin

TSSOP-EP37%7%

+16dBmIS-98CDMAU.S.,TDMAPAE=40%at+30dBm

MAX22662.7to5.034idle,

52avg,

100full824to849+28.0AB16-Pin

TSSOP-EP32%17%

+16dBmIS-98CDMAU.S.,Off-ChipSwitch,LowestCurrent

MAX22672.7to4.534idle,

56avg,

95full887to925+27.0AB16-Pin

TSSOP-EP28%12%

+17dBmIS-98CDMAJapan,InternalSwitch,

Smallest,MostEconomicalSolution

MAX22682.7to4.590idle887to925+27.0AB16-Pin

TSSOP-EP34%7%

+13.6dBmIS-98CDMAJapan,PDCPAE=41%at+29dBm

MAX22692.7to4.534idle,

50avg,

100full887to925+27.0AB16-Pin

TSSOP-EP29%17%

+17dBmIS-98CDMAJapan,Off-ChipSwitch,LowestCurrent

MAX22402.7to5.065idle

105full2400to2500+20ABUCSP

3x330%NABluetoothPAwithDigitalPowerControl,Shutdown

MAX22422.7to3.6280idle

300full2400to2500+22.5ABUCSP

3x417%

Pin=

-7dBm

315mA6.7%

+13dBm+22.5dBmOutputPowerat-33dBcACPRfor802.11b

28.5dBPowerGain

ExternalBiasControlforCurrentThrottleback

On-ChipPowerDetector

OutputPowerTunablefrom+10dBmto+22dBm

MAX22443.0to3.665idle

172full2400to2500+22ABUCSP

3x334.2%NAIntegratedInputMatch

InternalBandwidth-LimitedPowerRamping

PowerControlRange:0.5Vto2.0V

SupplyCurrent=170mAat+22dBm

MAX22453.0to3.665idle

179full2400to2500+22ABUCSP

3x329.2%NAIntegratedInputMatch

InternalBandwidth-LimitedPowerRamping

PowerControlRange:0.9Vto2.0V

SupplyCurrent=170mAat+22dBm

MAX22463.0to3.642idle

118full2400to2500+20ABUCSP

3x327.8%NAIntegratedInputMatch

InternalBandwidth-LimitedPowerRamping

PowerControlRange:0.5Vto2.0V

MAX22472.7to3.6293idle

390full2400to2500+25ABUCSP

3x424.5%21%

+22.5dBmHighLinearOutputPower:+25dBmwith-33dBcACPR

(1stsidelobe)and-55dBcACPR(2ndsidelobe)

25%EfficiencywithLinearOutputPower

29dBPowerGain

On-ChipPowerDetector

ExternalBiasControlforCurrentThrottleback

On-ChipInputMatching

0.5AShutdownMode

MAX22512.8to4.5205idle

1029full824to849+32.4

AMPS

+30

TDMA

ABUCSP

3x451%

AMPS

41%

TDMA

38%

+30dBm

AMPSGain:28dB

IntegratedPowerDetector

Low-PowerShutdownMode

PAE:41%at+30dBmforTDMA

PAE:51%at+32.4dBmforAMPS

MAX22812.7to4.235idle

731full824to849+29ABUCSP

5x5+31%14%

+16dBmPAE:14%at+16dBmOutputPowerforCDMA

PAE:31%at+29dBmOutputPowerforCDMA

PAE:40%at+31.5dBmOutputPowerforAMPS

PAE:43%at+30.5dBmOutputPowerforTDMA

ShutdownMode

MAX22822.7to4.235idle

471full887to925+27.5ABUCSP

5x534%17%

+18dBmPAE:17%at+18dBmOutputPowerforJCDMA

PAE:34%at+27.5dBmOutputPowerforJCDMA

23dBLow-PowerModeGain

28dBHigh-PowerModeGain

ShutdownMode

MAX22912.7to4.230idle

629full1850to1910+29ABUCSP

5x536%10%

+15dBmHigh-PowerPathGain:27dB

Low-PowerPathGain:15dB

N-CDMAPAE:36%at+28dBm

ShutdownMode

TDMAPAE:42%at+30.5dBm

W-CDMAPAE:37%at+28dBm

表2.针对市场选择

MarketPartAdvantagesSpecs

CellularCDMA(U.S.)MAX2265Low-cost,SimpleLayout,FewExternalComponents,

High-peakEfficiencyEfficiency=37%(ACPR=-45)

Efficiency=35%(ACPR=-48)

MAX2264

MAX2266Low-cost,World''sLowestTalkCurrentTalkCurrent=55mA

16dBmEfficiency=12/18%(2264/66)

PeakEfficiency=32%

MAX2281SmallSizeUltra-chipScalePackage

(2.5mmx2.5mm),

FixedorDynamicBiasingPAE:14%at+16dBmOutputPowerforCDMA

PAE:31%at+29dBmOutputPowerforCDMA

PAE:40%at+31.5dBmOutputPowerforAMPS

PAE:43%at+30.5dBmOutputPowerforTDMA

MAX2251SmallSizeUltra-chipScalePackage

(2.06mmx2.06mm),

IntegratedPowerDetector,

Low-powerShutdownModeGain:28dB

PAE:41%at+30dBmforTDMA

PAE:51%at+32.4dBmforAMPS

CDMA(Japan)MAX2268Low-cost,SimpleLayout,FewExternalComponents,

High-peakEfficiencyEfficiency=37%(ACPR=-45)

Efficiency=35%(ACPR=-48)

MAX2267

MAX2269Low-cost,World''sLowestTalkCurrentTalkCurrent=55mA

16dBmEfficiency=12/18%(2264/66andACPR=-45)

PeakEfficiency=33%(ACPR=-45)

MAX2282SmallSizeUltra-chipScalePackage

(2.5mmx2.5mm)PAE:17%at+18dBmOutputPowerforJCDMA

PAE:34%at+27.5dBmOutputPowerforJCDMA

23dBLow-PowerModeGain

28dBHigh-PowerModeGain

PCSCDMAMAX2291SmallSizeUltra-chipScalePackage

(2.5mmx2.5mm),ShutdownHigh-PowerPathGain:27dB

Low-PowerPathGain:15dB

N-CDMAPAE:36%at+28dBm

TDMAPAE:42%at+30.5dBm

W-CDMAPAE:37%at+28dBm

CellularTDMAMAX2281ShutdownModePAE:14%at+16dBmOutputPowerforCDMA

PAE:31%at+29dBmOutputPowerforCDMA

PAE:40%at+31.5dBmOutputPowerforAMPS

PAE:43%at+30.5dBmOutputPowerforTDMA

MAX2251SmallSizeUltra-chipScalePackage

(2.06mmx2.06mm),

IntegratedPowerDetector,

Low-powerShutdownModeGain:28dB

PAE:41%at+30dBmforTDMA

PCSTDMAMAX2291SmallSizeUltra-chipScalePackage

(2.5mmx2.5mm),ShutdownHigh-PowerPathGain:27dB

Low-PowerPathGain:15dB

N-CDMAPAE:36%at+28dBm

TDMAPAE:42%at+30.5dBm

W-CDMAPAE:37%at+28dBm

PDCMAX2265Low-cost,SimpleLayout,FewExternalComponents,

High-peakEfficiencyEfficiency=40%(ACPR=-28)

Pout=30dBm

AMPsMAX2251SmallSizeUltra-chipScalePackage

(2.06mmx2.06mm),

IntegratedPowerDetector,

Low-powerShutdownModeEfficiency=51%

Pout=32.4dBm

MAX2265Low-cost,SimpleLayout,FewExternalComponents,

High-peakEfficiencyPAE:48%at+31.5dBmOutputPowerforAMPS

WLLMAX2265Low-cost,SimpleLayout,FewExternalComponents,

High-peakEfficiencyEfficiency=37%(ACPR=-45)

Efficiency=35%(ACPR=-48)

900MHzISMMAX2235AnalogGainControl,AutoPowerRamp,ShutdownPAE:47%at+30.3dBmOutputPower

MAX2251SmallSizeUltra-chipScalePackage

(2.06mmx2.06mm),

IntegratedPowerDetector,

Low-powerShutdownModeGain:28dB

PAE:41%at+30dBmforTDMA

PAE:51%at+32.4dBmforAMPS

Bluetooth

HomeRF

2.4GHzDECTMAX2240SmallSizeUltra-chipScalePackage

(1.56mmx1.56mm),

2-bitDigitalPowerControl+20dBm,Efficiency=30%

MAX2244Closed-loopAnalogPowerControl,

SmallSizeUltra-chipScalePackage

(1.56mmx1.56mm)+22dBm,Efficiency=34.2%

Powercontrolrange0.5Vto2V

MAX2245Closed-loopAnalogPowerControl,

SmallSizeUltra-chip