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LTC6410-6

Description
Low Distortion, Low Noise Differential IF Amplifi er with Confi gurable Input Impedance
File Size345KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTC6410-6 Overview

Low Distortion, Low Noise Differential IF Amplifi er with Confi gurable Input Impedance

FEATURES
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LTC6410-6
Low Distortion, Low Noise
Differential IF Amplifier with
Configurable Input Impedance
DESCRIPTION
The LTC
®
6410-6 is a low distortion, low noise differential
IF amplifier with configurable input impedance designed
for use in applications from DC to 1.4GHz. The LTC6410-6
has 6dB of voltage gain. The LTC6410-6 is an excellent
choice for interfacing active mixers to SAW filters. It fea-
tures an active input termination that allows a customized
input impedance for an optimum interface to differential
active mixers. This feature provides additional power gain
because of the impedance conversion and improved noise
performance when compared to traditional 50Ω interface
circuits. The LTC6410-6 drives a differential 50Ω load
directly with low distortion, which is suitable for driving
SAW filters and other 50Ω signal chain blocks.
The LTC6410-6 operates on 3V or 5V supplies. It comes in
a compact 16-lead 3mm
×
3mm QFN package and operates
over a –40°C to 85°C temperature range.
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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1.4GHz –3dB Bandwidth
Fixed Voltage Gain of 6dB (50Ω System)
Configurable Input Impedance Allows:
Simple Interface to Active Mixers
Improved Noise Performance
Wide 2.8V to 5.25V Supply Range
Low Distortion:
36dBm OIP3 (70MHz)
33dBm OIP3 (140MHz)
31dBm OIP3 (300MHz)
Low Noise:
11dB NF (50Ω Z
IN
)
8dB NF (200Ω Z
IN
)
Differential Inputs and Outputs
Self-Biasing Inputs/Outputs
Shutdown Mode
Minimal Support Circuitry Required
16-Lead 3mm
×
3mm
×
0.8mm QFN Package
APPLICATIONS
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Post-Mixer Gain Block
SAW Filter Interface/Buffering
Differential IF Signal Chain Gain Block
Differential Line Driver/Receiver
TYPICAL APPLICATION
Post Mixer Gain Block (140MHz IF)
5V
5V
680pF
V
+
SHDN
–OUT
LTC6410-6
24nH
+IN
12pF
1760MHz
LO
LT5527
MIXER
18pF
+TERM
V
0.1μF
+OUT
V
BIAS
64106 TA01a
2-Tone Spectrum Analyzer Plot
0
–10
–20
0.1μF
OUTPUT POWER (dBm)
82nH
82nH
24nH
12pF
18pF
–TERM
–IN
–30
–40
–50
–60
–70
–80
–90
SYSTEM OIP3 = 29dBm AT 1900MHz
SYSTEM NF = 15dB AT 1900MHz
–100
130 132 134 136 138 140 142 144 146 148 150
FREQUENCY (MHz)
64106 TA01b
64106fa
1

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Description Low Distortion, Low Noise Differential IF Amplifi er with Confi gurable Input Impedance Low Distortion, Low Noise Differential IF Amplifi er with Confi gurable Input Impedance Low Distortion, Low Noise Differential IF Amplifi er with Confi gurable Input Impedance Low Distortion, Low Noise Differential IF Amplifi er with Confi gurable Input Impedance
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