Maxim无线/射频功率放大器选择指南

2008-04-01 16:11:26来源: 互联网

  本文概括了Maxim针对蜂窝、PCS、802.11b、无绳电话以及Bluetooth等应用提供的射频(RF)功率放大器(PA)。列出了工作电压、电源电流、输出功率、封装、功效等参数的对照表,并给出了Maxim PA IC的特点。另外,还提供了一个根据市场应用选择的参考表。

  更多信息请查询:无线产品网页

  更多信息请查询:快速浏览MAX2240数据资料

  更多信息请查询:快速浏览MAX2264/MAX2265数据资料

  更多信息请查询:快速浏览MAX2267/MAX2268/MAX2269数据资料

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

  更多信息请查询:快速浏览MAX2430数据资料

  更多信息请查询:快速浏览MAX2601/MAX2602数据资料

  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:自动斜率控制可减小频谱扩散,自动斜率控制有助于保持Vcc的稳定、降低VCO牵引。自动热保护功能能够根据需要临时减小输出功率,提供一个坚固、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提供更低的电源电流,CDMA PA在大多数时间工作在较低的输出功率状态。

  对于2.4GHz ISM应用,如:802.11b WLAN、Bluetooth、HomeRF及无绳电话,Maxim可提供低成本、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控制、闭环功率控制、动态偏置控制、集成检测器等,并具有较高的效率。

  以下列出了采用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单的器件制作工艺(与超外差器件相比)

  小尺寸,采用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提供稳定的器件特性

  自动斜率控制

  下表列出了我们的一些功率放大器及其性能,注意,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

  Part Vcc

  (V)

  Icc

  (mA)

  Frequency

  (MHz)

  Pout

  (dBm)

  Class Package PAE

  (full)

  PAE

  (derated)

  Features

  MAX2235 2.7 to 5.5 20 idle

  610 full

  800 to 1000 +30.3 C 20-Pin

  TSSOP-EP

  47% 22%

  +24dBm

  Analog Gain Control, Auto Power Ramp, Shutdown

  MAX2430 3.0 to 5.5 52 800 to 1000 +21.4 AB 16-Pin

  SO/QSOP

  24% NA Power Control, Shutdown, Drives MAX2601/02

  MAX2601 2.7 to 5.5 450 DC to 1000 +30.0 AB/C 8-Pin

  PSOPII

  54% 18%

  +20dBm

  Power Transistor

  MAX2602 2.7 to 5.5 450 DC to 1000 +30.0 AB/C 8-Pin

  PSOPII

  54% 18%

  +20dBm

  Power Transistor with On-Chip Bias Diode, Power Ramp, Shutdown

  MAX2264 2.7 to 5.0 34 idle,

  58 avg,

  95 full

  824 to 849 +28.0 AB 16-Pin

  TSSOP-EP

  32% 12%

  +16dBm

  IS-98 CDMA U.S., Internal Switch,

  Smallest, Most Economical Solution

  MAX2265 2.7 to 5.0 83 full 824 to 849 +28.0 AB 16-Pin

  TSSOP-EP

  37% 7%

  +16dBm

  IS-98 CDMA U.S., TDMA PAE = 40% at +30dBm

  MAX2266 2.7 to 5.0 34 idle,

  52 avg,

  100 full

  824 to 849 +28.0 AB 16-Pin

  TSSOP-EP

  32% 17%

  +16dBm

  IS-98 CDMA U.S., Off-Chip Switch, Lowest Current

  MAX2267 2.7 to 4.5 34 idle,

  56 avg,

  95 full

  887 to 925 +27.0 AB 16-Pin

  TSSOP-EP

  28% 12%

  +17dBm

  IS-98 CDMA Japan, Internal Switch,

  Smallest, Most Economical Solution

  MAX2268 2.7 to 4.5 90 idle 887 to 925 +27.0 AB 16-Pin

  TSSOP-EP

  34% 7%

  +13.6dBm

  IS-98 CDMA Japan, PDC PAE = 41% at +29dBm

  MAX2269 2.7 to 4.5 34 idle,

  50 avg,

  100 full

  887 to 925 +27.0 AB 16-Pin

  TSSOP-EP

  29% 17%

  +17dBm

  IS-98 CDMA Japan, Off-Chip Switch, Lowest Current

  MAX2240 2.7 to 5.0 65 idle

  105 full

  2400 to 2500 +20 AB UCSP

  3x3

  30% NA Bluetooth PA with Digital Power Control, Shutdown

  MAX2242 2.7 to 3.6 280 idle

  300 full

  2400 to 2500 +22.5 AB UCSP

  3x4

  17%

  Pin=

  -7dBm

  315mA

  6.7%

  +13dBm

  +22.5dBm Output Power at -33dBc ACPR for 802.11b

  28.5dB Power Gain

  External Bias Control for Current Throttleback

  On-Chip Power Detector

  Output Power Tunable from +10dBm to +22dBm

  MAX2244 3.0 to 3.6 65 idle

  172 full

  2400 to 2500 +22 AB UCSP

  3x3

  34.2% NA Integrated Input Match

  Internal Bandwidth-Limited Power Ramping

  Power Control Range: 0.5V to 2.0V

  Supply Current = 170mA at +22dBm

  MAX2245 3.0 to 3.6 65 idle

  179 full

  2400 to 2500 +22 AB UCSP

  3x3

  29.2% NA Integrated Input Match

  Internal Bandwidth-Limited Power Ramping

  Power Control Range: 0.9V to 2.0V

  Supply Current = 170mA at +22dBm

  MAX2246 3.0 to 3.6 42 idle

  118 full

  2400 to 2500 +20 AB UCSP

  3x3

  27.8% NA Integrated Input Match

  Internal Bandwidth-Limited Power Ramping

  Power Control Range: 0.5V to 2.0V

  MAX2247 2.7 to 3.6 293 idle

  390 full

  2400 to 2500 +25 AB UCSP

  3x4

  24.5% 21%

  +22.5dBm

  High Linear Output Power: +25dBm with <-33dBc ACPR

  (1st side lobe) and <-55dBc ACPR (2nd side lobe)

  25% Efficiency with Linear Output Power

  29dB Power Gain

  On-Chip Power Detector

  External Bias Control for Current Throttleback

  On-Chip Input Matching

  0.5A Shutdown Mode

  MAX2251 2.8 to 4.5 205 idle

  1029 full

  824 to 849 +32.4

  AMPS

  +30

  TDMA

  AB UCSP

  3x4

  51%

  AMPS

  41%

  TDMA

  38%

  +30dBm

  AMPS

  Gain: 28dB

  Integrated Power Detector

  Low-Power Shutdown Mode

  PAE: 41% at +30dBm for TDMA

  PAE: 51% at +32.4dBm for AMPS

  MAX2281 2.7 to 4.2 35 idle

  731 full

  824 to 849 +29 AB UCSP

  5x5

  +31% 14%

  +16dBm

  PAE: 14% at +16dBm Output Power for CDMA

  PAE: 31% at +29dBm Output Power for CDMA

  PAE: 40% at +31.5dBm Output Power for AMPS

  PAE: 43% at +30.5dBm Output Power for TDMA

  Shutdown Mode

  MAX2282 2.7 to 4.2 35 idle

  471 full

  887 to 925 +27.5 AB UCSP

  5x5

  34% 17%

  +18dBm

  PAE: 17% at +18dBm Output Power for JCDMA

  PAE: 34% at +27.5dBm Output Power for JCDMA

  23dB Low-Power Mode Gain

  28dB High-Power Mode Gain

  Shutdown Mode

  MAX2291 2.7 to 4.2 30 idle

  629 full

  1850 to 1910 +29 AB UCSP

  5x5

  36% 10%

  +15dBm

  High-Power Path Gain: 27dB

  Low-Power Path Gain: 15dB

  N-CDMA PAE: 36% at +28dBm

  Shutdown Mode

  TDMA PAE: 42% at +30.5dBm

  W-CDMA PAE: 37% at +28dBm

  表2. 针对市场选择

  Market Part Advantages Specs

  Cellular CDMA (U.S.) MAX2265 Low-cost, Simple Layout, Few External Components,

  High-peak Efficiency

  Efficiency = 37% (ACPR = -45)

  Efficiency = 35% (ACPR = -48)

  MAX2264

  MAX2266

  Low-cost, World''s Lowest Talk Current Talk Current=55mA

  16dBm Efficiency =12/18% (2264/66)

  Peak Efficiency =32%

  MAX2281 Small Size Ultra-chip Scale Package

  (2.5mm x 2.5mm),

  Fixed or Dynamic Biasing

  PAE: 14% at +16dBm Output Power for CDMA

  PAE: 31% at +29dBm Output Power for CDMA

  PAE: 40% at +31.5dBm Output Power for AMPS

  PAE: 43% at +30.5dBm Output Power for TDMA

  MAX2251 Small Size Ultra-chip Scale Package

  (2.06mm x 2.06mm),

  Integrated Power Detector,

  Low-power Shutdown Mode

  Gain: 28dB

  PAE: 41% at +30dBm for TDMA

  PAE: 51% at +32.4dBm for AMPS

  CDMA (Japan) MAX2268 Low-cost, Simple Layout, Few External Components,

  High-peak Efficiency

  Efficiency = 37% (ACPR = -45)

  Efficiency = 35% (ACPR = -48)

  MAX2267

  MAX2269

  Low-cost, World''s Lowest Talk Current Talk Current=55mA

  16dBm Efficiency =12/18% (2264/66 and ACPR=-45)

  Peak Efficiency =33% (ACPR=-45)

  MAX2282 Small Size Ultra-chip Scale Package

  (2.5mm x 2.5mm)

  PAE: 17% at +18dBm Output Power for JCDMA

  PAE: 34% at +27.5dBm Output Power for JCDMA

  23dB Low-Power Mode Gain

  28dB High-Power Mode Gain

  PCS CDMA MAX2291 Small Size Ultra-chip Scale Package

  (2.5mm x 2.5mm), Shutdown

  High-Power Path Gain: 27dB

  Low-Power Path Gain: 15dB

  N-CDMA PAE: 36% at +28dBm

  TDMA PAE: 42% at +30.5dBm

  W-CDMA PAE: 37% at +28dBm

  Cellular TDMA MAX2281 Shutdown Mode PAE: 14% at +16dBm Output Power for CDMA

  PAE: 31% at +29dBm Output Power for CDMA

  PAE: 40% at +31.5dBm Output Power for AMPS

  PAE: 43% at +30.5dBm Output Power for TDMA

  MAX2251 Small Size Ultra-chip Scale Package

  (2.06mm x 2.06mm),

  Integrated Power Detector,

  Low-power Shutdown Mode

  Gain: 28dB

  PAE: 41% at +30dBm for TDMA

  PCS TDMA MAX2291 Small Size Ultra-chip Scale Package

  (2.5mm x 2.5mm), Shutdown

  High-Power Path Gain: 27dB

  Low-Power Path Gain: 15dB

  N-CDMA PAE: 36% at +28dBm

  TDMA PAE: 42% at +30.5dBm

  W-CDMA PAE: 37% at +28dBm

  PDC MAX2265 Low-cost, Simple Layout, Few External Components,

  High-peak Efficiency

  Efficiency=40% (ACPR=-28)

  Pout=30dBm

  AMPs MAX2251 Small Size Ultra-chip Scale Package

  (2.06mm x 2.06mm),

  Integrated Power Detector,

  Low-power Shutdown Mode

  Efficiency=51%

  Pout=32.4dBm

  MAX2265 Low-cost, Simple Layout, Few External Components,

  High-peak Efficiency

  PAE: 48% at +31.5dBm Output Power for AMPS

  WLL MAX2265 Low-cost, Simple Layout, Few External Components,

  High-peak Efficiency

  Efficiency=37% (ACPR=-45)

  Efficiency=35% (ACPR=-48)

  900MHz ISM MAX2235 Analog Gain Control, Auto Power Ramp, Shutdown PAE: 47% at +30.3dBm Output Power

  MAX2251 Small Size Ultra-chip Scale Package

  (2.06mm x 2.06mm),

  Integrated Power Detector,

  Low-power Shutdown Mode

  Gain: 28dB

  PAE: 41% at +30dBm for TDMA

  PAE: 51% at +32.4dBm for AMPS

  Bluetooth

  HomeRF

  2.4GHz DECT

  MAX2240 Small Size Ultra-chip Scale Package

  (1.56mm x 1.56mm),

  2-bit Digital Power Control

  +20dBm, Efficiency =30%

  MAX2244 Closed-loop Analog Power Control,

  Small Size Ultra-chip Scale Package

  (1.56mm x 1.56mm)

  +22dBm, Efficiency = 34.2%

  Power control range 0.5V to 2V

  MAX2245 Closed-loop Analog Power Control,

  Small Size Ultra-chip Scale Package

  (1.56mm x 1.56mm)

  +22dBm, Efficiency = 29.2%

  Power control range 0.9V to 2V

  MAX2246 Closed-loop Analog Power Control,

  Small Size Ultra-chip Scale Package

  (1.56mm x 1.56mm)

  +20dBm, Efficiency = 27.8%

  Power control range 0.5V to 2V

  Cellular TDMA/AMPS

  Dual Mode

  MAX2251 Small Size Ultra-chip Scale Package

  (2.06mm x 2.06mm),

  Integrated Power Detector,

  Low-power Shutdown Mode

  Gain: 28dB

  PAE: 41% at +30dBm for TDMA

  PAE: 51% at +32.4dBm for AMPS

  802.11b WLAN MAX2242 Integrated Power Detector,

  Dynamic Bias Control,

  Output Power Tunable from +10dBm to +22dBm

  +22.5dBm Output Power at -33dBc ACPR for 802.11B

  28.5dB Power Gain

 

关键字:Power  PAE  线性调制  Maxim  射频功率放大器  Output  Shut

编辑:王婷婷 引用地址:http://www.eeworld.com.cn/xfdz/2008/0401/article_308.html
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