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LT5581IDDB#TRMPBF

Description
IC RMS POWER DETECTOR 8-DFN
CategoryAnalog mixed-signal IC    The signal circuit   
File Size614KB,18 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LT5581IDDB#TRMPBF Overview

IC RMS POWER DETECTOR 8-DFN

LT5581IDDB#TRMPBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeDFN
Contacts8
Manufacturer packaging codeDDB
Reach Compliance Codeunknown
Samacsys DescriptionIC RMS POWER DETECTOR 8-DFN
LT5581
6GHz RMS Power Detector
with 40dB Dynamic Range
FEATURES
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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 power
from –34dBm to +6dBm (at 2.14GHz) of modulated 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 mea-
surement and control for a wide variety of RF standards,
including GSM/EDGE, CDMA, CDMA2000, W-CDMA,
TD-SCDMA, UMTS, LTE and WiMAX, etc. The final DC out-
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.
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.
n
n
n
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Frequency Range: 10MHz to 6GHz
Accurate Power Measurement of High Crest Factor
(Up to 12dB) Waveforms
40dB Log Linear Dynamic Range
Exceptional Accuracy Over Temperature
Fast Response Time: 1μs Rise, 8μs Fall
Low Power: 1.4mA at 3.3V
Log-Linear DC Output vs Input RF Power in dBm
Small 3mm × 2mm 8-Pin DFN Package
Single-Ended RF Input
APPLICATIONS
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GSM/EDGE, CMDA, CDMA2000, W-CDMA, LTE,
WiMAX RF Power Control
Pico-Cells, Femto-Cells RF Power Control
Wireless Repeaters
CATV/DVB Transmitters
MIMO Wireless Access Points
Portable RMS Power Measurement Instrumentation
TYPICAL APPLICATION
10MHz to 6GHz Infrastructure Power
Amplifier Level Control
RF
IN
POWER
AMP
V
CC
2.7V
DC
TO 5.25V
DC
DIGITAL
POWER
CONTROL
ADC
C
FILT
0.01µF
0.1µF
1
2
3
4
V
CC
EN
V
OUT
GND
GND
9
5581 TA01a
Linearity Error vs RF Input Power,
2140MHz Modulated Waveforms
DIRECTIONAL
COUPLER
C
MATCH
3
RF
OUT
T
A
= 25°C
2
LINEARITY ERROR (dB)
1
0
–1
–2
CW
WCDMA, UL
WCDMA DL 1C
WCDMA DL 4C
LTE DL 1C
LTE DL 4C
C
SQ
LT5581
RF
IN
GND
GND
0.01µF
8
7
6
5
1000pF
L
MATCH
50
68
–3
–35 –30 –25 –20 –15 –10 –5 0
RF INPUT POWER (dBm)
5
10
5581 TA01b
5581fb
For more information
www.linear.com/LT5581
1

LT5581IDDB#TRMPBF Related Products

LT5581IDDB#TRMPBF LT5581IDDB#PBF
Description IC RMS POWER DETECTOR 8-DFN 6GHz RMS power detector with 40dB dynamic range
Brand Name Linear Technology Linear Technology
Is it Rohs certified? conform to conform to
Maker Linear ( ADI ) Linear ( ADI )
Parts packaging code DFN DFN
Contacts 8 8
Manufacturer packaging code DDB DDB
Reach Compliance Code unknown compliant
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