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LT5581

更新时间： 2024-11-03 14:57:59
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
18页 624K
描述
具 40dB 动态范围的 6GHz RMS 功率检波器

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中文翻译

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LT5581 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  
proprietarytechniquetoaccuratelymeasuretheRFpower  
from–34dBmto+6dBm(at2.14GHz)ofmodulatedsignals  
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 mea-  
surement and control for a wide variety of RF standards,  
including GSM/EDGE, CDMA, CDMA2000, W-CDMA,  
TD-SCDMA, UMTS, LTEandWiMAX, etc. ThefinalDCout-  
put is connected in series with an on-chip 300Ω resistor,  
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,  
L, LT, LTC, LTM, Linear Technology and the Linear logo 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  
V
C
CC  
MATCH  
2.7V TO 5.25V  
DC  
DC  
1
0
0.1µF  
0.01µF  
DIGITAL  
1
8
50Ω  
L
MATCH  
C
V
SQ  
CC  
POWER  
1000pF  
CONTROL  
2
7
EN  
RF  
IN  
CW  
WCDMA, UL  
LT5581  
–1  
3
4
6
5
ADC  
GND  
V
OUT  
WCDMA DL 1C  
WCDMA DL 4C  
LTE DL 1C  
68Ω  
–2  
–3  
GND GND GND  
9
C
FILT  
0.01µF  
LTE DL 4C  
5581 TA01a  
–30 –25 –20 –15 –10 –5  
RF INPUT POWER (dBm)  
0
5
10  
–35  
5581 TA01b  
5581fb  
1
For more information www.linear.com/LT5581  
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