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參數(shù)資料
| 型號(hào)： | TSH690ID |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 40MHz to 1GHz AMPLIFIER |
| 中文描述： | 高達(dá)40MHz至1GHz放大器 |
| 文件頁(yè)數(shù)： | 6/10頁(yè) |
| 文件大?。?/td> | 134K |
| 代理商： | TSH690ID |
Figure1 :
Typical 300MHz-1000MHzBiasing Circuit
CIRCUIT DESCRIPTION
TheTSH690is50
input/outputinternallymatched
from 300MHz to 1000MHz. Dueto its open-collec-
tor structure, the output RF port must be tied to
Vcc2. The pin 8 allows a bias currentadjust to set
the output power and the gain.The circuit is pack-
agedinSO8forthermaldissipationconsiderations.
MATCHING
Within the300-1000MHzband,althoughthe circuit
is matched,the outputreturn loss can be improved
by adding a serial inductor (L2) between the RF
output and V
CC2
(56nH @ 450MHz and 10nH @
900MHz).Below300MHz, usingthe S-parameters
matrix, specific input/output matching networks
can be calculatedto maximize electrical perform-
ances.
DC BLOCKING
Because input/output are respectivelyinternal/ex-
ternal biased, DC blocks (C1, C2) are recom-
mended on both RF ports to guarantee a DC
isolationfromthenextcells.Above500MHz,100pF
is suggested whereas below, 1nF is betterand far
below (less than 100MHz),10nF is prefered.
BIASING
The amplifier can operate in the range of 1.5V to
5V and offers a bias current adjustfunction
(Vbias pin) which enables the trimming of the RF
output power (AB class Amplifier) by tuninga se-
ries variable resistor (Rbias).
When Vbias is wired to the Vcc rail, the current
consumptionis maximized getting the best linear-
ity (A class Amplifier)whereas biasing to
Ground,the IC is setin powerdown mode.
For highersupply voltage than 4V to reach high
output power, the serial resistor (R1) is strongly
recommended to increase the efficiencyof the
amplifier and therefore reduce the thermaldissi-
pationof the circuit.
DECOUPLING
As with any RF devices,the supply voltagedecou-
pling must be done carefully using a 1nF bypass
capacitor (C3, C5) placed as close as possible to
the device pins and could be also improved by
adding a 150nH RF choke inductance (L1). Con-
cerningthe Vbiaspin, a10nFdecouplingcapacitor
(C4)is recommendedwhileplacingonboardis not
critical.Note that SurfaceMounted Devices(SMD)
components are prefered for RF applications due
to theright behaviourin highfrequencieswhile low
inductor values (few 10nH) can be printed on
board.
APPLICATIONSINFORMATION
TSH690
6/10
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TSH690ID | 制造商:STMicroelectronics 功能描述:IC AMP 1GHZ 20MW SMD SOIC8 690 |
| TSH690IDT | 功能描述:射頻放大器 RF Wide Bandwidth 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(diǎn):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(cè)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 |
| TSH691 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW COST 40MHz - 1GHz AMPLIFIER |
| TSH691ID | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW COST 40MHz - 1GHz AMPLIFIER |
| TSH692ID | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IC-SM-900MHZ AMP |
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