LTC6431-15
50 Gain Block
IF Amplifier
Fea T Descrip T
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20MHz to 1700MHz Bandwidth
The LTC 6431-15 is a gain-block amplifier with excellent
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15.5dB Power Gain
linearity at frequencies beyond 1000MHz and with low
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47dBm OIP3 at 240MHz into a 50 Load
associated output noise.
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NF = 3.33dB at 240MHz
The unique combination of high linearity, low noise and
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1nV/Hz Total Input Noise
low power dissipation make this an ideal candidate for
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S11 < 15dB Up to 1.2GHz
many signal-chain applications. The LTC6431-15 is easy
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S22 < 15dB Up to 1.2GHz
to use, requiring a minimum of external components. It is
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>2V Linear Output Swing
P-P
internally input/output matched to 50 and it draws only
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P1dB = 20.6dBm
90mA from a single 5V supply.
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DC Power = 450mW
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On-chip bias and temperature compensation maintain
50 Single-Ended Operation
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performance over environmental changes.
Insensitive to V Variation
CC
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A-Grade 100% OIP3 Tested at 240MHz
The LTC6431-15 uses a high performance SiGe BiCMOS
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Input/Output Internally Matched to 50
process for excellent repeatability compared with similar
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Single 5V Supply
GaAs amplifiers. All A-grade LTC6431-15 devices are tested
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Unconditionally Stable
and guaranteed for OIP3 at 240MHz. The LTC6431-15 is
housed in a 4mm 4mm 24-lead QFN package with an
a T
exposed pad for thermal management and low inductance.
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Single-Ended IF Amplifier
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.
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ADC Driver
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CATV
Typical a T
Single-Ended IF Amplifier
OIP3 vs Frequency
50
5V
48
R
F
V = 5V
CC
CHOKE,
46
560nH
1000pF 1000pF
44
LTC6431-15
42
R
R
SOURCE
LOAD
50
50
40
V = 5V, T = 25C
CC
643115 TA01a
P = 2dBm/TONE
OUT
38
f = 1MHz
SPACE
Z = Z = 50
IN OUT
36
0 200 400 600 800 1000
FREQUENCY (MHz)
643115 TA01b
643115f
1
OIP3 (dBm)
ion pplica
ions pplica
ion uresLTC6431-15
a Te Maxi Mu M r a T p in c F T
(Note 1)
TOP VIEW
Total Supply Voltage (V to GND)...........................5.5V
CC
Amplifier Output Current (OUT) ...........................105mA
24 23 22 21 20 19
RF Input Power, Continuous, 50 (Note 2)..........15dBm
RF Input Power, 100s Pulse, 50 (Note 2) ........20dBm DNC 1 18 OUT
DNC 2 17 GND
Operating Case Temperature
DNC 3 16 T_DIODE
25
Range (T ) ..........................................40C to 85C
CASE
GND
DNC 4 15 DNC
Storage Temperature Range .................. 65C to 150C
DNC 5 14 DNC
Junction Temperature (T ) .................................... 150C
J
DNC 6 13 DNC
7 8 9 10 11 12
UF PACKAGE
24-LEAD (4mm 4mm) PLASTIC QFN
T = 150C, = 54C/W
JMAX JC
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
o r Der i n F Ma T
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC6431AIUF-15#PBF LTC6431AIUF-15#TRPBF 43115 24-Lead (4mm 4mm) Plastic QFN 40C to 85C
LTC6431BIUF-15#PBF LTC6431BIUF-15#TRPBF 43115 24-Lead (4mm 4mm) Plastic QFN 40C to 85C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: