本文概括了Maxim針對蜂窩、PCS、802.11b、無繩電話以及Bluetooth等應用提供的射頻(RF)功率放大器(PA)。列出了工作電壓、電源電流、輸出功率、封裝、功效等參數的對照表,并給出了Maxim PA IC的特點。另外,還提供了一個根據市場應用選擇的參考表。
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更多信息請查詢:快速瀏覽MAX2240數據資料
更多信息請查詢:快速瀏覽MAX2264/MAX2265數據資料
更多信息請查詢:快速瀏覽MAX2267/MAX2268/MAX2269數據資料
更多信息請查詢:快速瀏覽MAX2320/MAX2321/MAX2322/MAX2324/MAX2326/MAX2327數據資料
更多信息請查詢:快速瀏覽MAX2430數據資料
更多信息請查詢:快速瀏覽MAX2601/MAX2602數據資料
更多信息請查詢:應用技術支持
Maxim的RF功率放大器即可應用于線性調制,如QAM和QPSK,也可用于非線性調制,如:FM、FSK等。針對TDMA市場設計的PA在性能上有所改進,如:自動斜率控制可減小頻譜擴散,自動斜率控制有助于保持Vcc的穩定、降低VCO牽引。自動熱保護功能能夠根據需要臨時減小輸出功率,提供一個堅固、耐用的PA。針對CDMA市場推出的PA能夠在城市或遠郊CDMA環境下、對于大多數便攜終端要求的輸出功率電平提供更低的電源電流,CDMA PA在大多數時間工作在較低的輸出功率狀態。
對于2.4GHz ISM應用,如:802.11b WLAN、Bluetooth、HomeRF及無繩電話,Maxim可提供低成本、超小尺寸(如UCSP封裝)的功率放大器,這些PA具有模擬或數字的功率控制、閉環功率控制、動態偏置控制、集成檢測器等,并具有較高的效率。
以下列出了采用硅雙極型工藝設計的RF功率放大器關鍵特性:
低成本,這一點得益于它較高的管芯產量和簡單的器件制作工藝(與超外差器件相比)
小尺寸,采用UCSP封裝和較少的外部元件
無需負偏置電源,不同于大多數GaAs放大器
在全溫范圍和負載變化范圍內提供穩定的器件特性
自動斜率控制
下表列出了我們的一些功率放大器及其性能,注意,有幾款PA需要在指定的性能參數和中心頻點進行重新調諧,與表中參數有差異。
表1. 選擇指南: 型號列表
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
0.5µA 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
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