LTC6431-20_15 Datasheet, PDF (1/16 Pages) Linear Technology – 20dB Gain Block, 50 IF Amplifier

FEATURES
n _{50Ω Matched 20MHz to 1400MHz}
n _{20.8dB Power Gain}
n _{46.2dBm OIP3 at 240MHz Into 50Ω}
n _{NF = 2.6dB at 240MHz}
n _{0.6nV/√Hz Total Input Noise}
n _{S11 < –10dB Up to 2.0GHz}
n _{S22 < –10dB Up to 1.4GHz}
n _{>2.0VP-P Linear Output Swing}
n _{P1dB = 22.0dBm}
n _{50Ω Single-Ended Input/Output}
n _{Insensitive to VCC Variation}
n _{A-Grade 100% OIP3 Tested at 240MHz}
n _{Input/Output Internally Matched to 50Ω}
n _{Single 5V Supply}
APPLICATIONS
n _{Single-Ended IF Amplifier}
n _{ADC Driver}
n _CATV
LTC6431-20
20dB Gain Block,
50Ω IF Amplifier
DESCRIPTION
The LTC^®6431-20 is a gain block amplifier exhibiting
excellent linearity at frequencies beyond 1000MHz and
with low associated output noise.
The unique combination of linearity, low noise and low
power dissipation make this an ideal candidate for many
signal-chain applications. The LTC6431-20 is easy to
use, requiring a minimum of external components. It is
internally input/output matched to 50Ω and it draws only
93mA from a single 5V supply.
On-chip bias and temperature compensation maintain
performance over environmental changes.
The LTC6431-20 uses a high performance SiGe BiCMOS
process for excellent repeatability compared with similar
GaAs amplifiers. All A-grade LTC6431-20 devices are tested
and guaranteed for OIP3 at 240MHz. The LTC6431-20 is
housed in a 4mm × 4mm 24-lead QFN package with an
exposed pad for thermal management and low inductance.
LTC6431 FAMILY
GAIN
LTC6431-15
15.5dB
LTC6431-20
20.8dB
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.
TYPICAL APPLICATION
Single-Ended IF Amplifier
V_CC = 5V
5V
RF CHOKE
560nH
1000pF
50Ω
LTC6431-20
1000pF
50Ω
643120 TA01a
OIP3 vs Frequency
52
50
48
46
44
42
V_CC = 5V
40 T_A = 25°C
P_OUT = 2dBm/TONE
38 f_SPACE = 1MHz
Z_IN = Z_OUT = 50Ω
36
0
200 400 600 800
FREQUENCY (MHz)
1000
643120 TA01b
For more information www.linear.com/LTC6431-20
643120f
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