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LT5581IDDB-TRPBF PDF预览

LT5581IDDB-TRPBF

更新时间： 2024-11-02 05:43:35
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
16页 495K
描述
6GHz RMS Power Detector with 40dB Dynamic Range

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中文翻译

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LT5581IDDB-TRPBF 数据手册

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LT5581  
6GHz RMS Power Detector  
with 40dB Dynamic Range  
FEATURES  
DESCRIPTION  
The LT®5581 is a 10MHz to 6GHz, low power monolithic  
precision RMS power detector. The RMS detector uses  
a proprietary technique to accurately measure the RF  
powerfrom–34dBmto+6dBm(at2.14GHz)ofmodulated  
signals with a crest factor as high as 12dB. It outputs a DC  
voltage in linear scale proportional to an RF input signal  
power in dBm. The LT5581 is suitable for precision power  
measurementandcontrolforawidevarietyofRFstandards,  
including GSM/EDGE, CDMA, CDMA2000, W-CDMA, TD-  
SCDMA, UMTS, LTE and WiMAX, etc. The final DC output  
isconnectedinserieswithanon-chip300Ωresistor,which  
enables further filtering of the output modulation ripple  
with just a single off-chip capacitor.  
n
Frequency Range: 10MHz to 6GHz  
n
Accurate Power Measurement of High Crest Factor  
(Up to 12dB) Waveforms  
40dB Log Linear Dynamic Range  
n
n
Exceptional Accuracy Over Temperature  
n
Fast Response Time: 1μs Rise, 8μs Fall  
n
Low Power: 1.4mA at 3.3V  
n
Log-Linear DC Output vs Input RF Power in dBm  
n
Small 3mm × 2mm 8-Pin DFN Package  
Single-Ended RF Input  
n
APPLICATIONS  
n
GSM/EDGE, CMDA, CDMA2000, W-CDMA, LTE,  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners. Protected by U.S. Patents,  
including 7342431.  
WiMAX RF Power Control  
n
Pico-Cells, Femto-Cells RF Power Control  
Wireless Repeaters  
CATV/DVB Transmitters  
MIMO Wireless Access Points  
Portable RMS Power Measurement Instrumentation  
n
n
n
n
TYPICAL APPLICATION  
10MHz to 6GHz Infrastructure Power  
Amplifier Level Control  
Linearity Error vs RF Input Power,  
2140MHz Modulated Waveforms  
DIRECTIONAL  
COUPLER  
3
2
POWER  
AMP  
T
= 25°C  
A
RF  
IN  
RF  
OUT  
C
V
MATCH  
CC  
2.7V TO 5.25V  
DC  
DC  
1
0
0.1μF  
0.01μF  
DIGITAL  
50ꢀ  
1
8
L
MATCH  
C
V
POWER  
SQ  
CC  
1000pF  
CONTROL  
2
7
RF  
EN  
IN  
CW  
WCDMA, UL  
–1  
LT5581  
3
4
6
5
ADC  
GND  
WCDMA DL 1C  
WCDMA DL 4C  
LTE DL 1C  
V
OUT  
68ꢀ  
–2  
–3  
GND GND GND  
9
C
FILT  
LTE DL 4C  
0.01μF  
–30 –25 –20 –15 –10 –5  
RF INPUT POWER (dBm)  
0
5
10  
–35  
5581 TA01a  
5581 TA01b  
5581f  
1
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