LTC6431-15 Datasheet, PDF (1/16 Pages) Linear Technology – 50Ω Gain Block IF Amplifier n 20MHz to 1700MHz Bandwidth

Features
n _{20MHz to 1700MHz Bandwidth}
n _{15.5dB Power Gain}
n _{47dBm OIP3 at 240MHz into a 50Ω Load}
n _{NF = 3.33dB at 240MHz}
n _{1nV/√Hz Total Input Noise}
n _{S11 < –15dB Up to 1.2GHz}
n _{S22 < –15dB Up to 1.2GHz}
n _{> 2VP-P Linear Output Swing}
n _{P1dB = 20.6dBm}
n _{DC Power = 450mW}
n _{50Ω Single-Ended Operation}
n _{Insensitive to VCC Variation}
n _{A-Grade 100% OIP3 Tested at 240MHz}
n _{Input/Output Internally Matched to 50Ω}
n _{Single 5V Supply}
n _{Unconditionally Stable}
Applications
n _{Single-Ended IF Amplifier}
n _{ADC Driver}
n _CATV
Typical Application
LTC6431-15
50Ω Gain Block
IF Amplifier
Description
The LTC^®6431-15 is a gain-block amplifier with excellent
linearity at frequencies beyond 1000MHz and with low
associated output noise.
The unique combination of high linearity, low noise and
low power dissipation make this an ideal candidate for
many signal-chain applications. The LTC6431-15 is easy
to use, requiring a minimum of external components. It is
internally input/output matched to 50Ω and it draws only
90mA from a single 5V supply.
On-chip bias and temperature compensation maintain
performance over environmental changes.
The LTC6431-15 uses a high performance SiGe BiCMOS
process for excellent repeatability compared with similar
GaAs amplifiers. All A-grade LTC6431-15 devices are tested
and guaranteed for OIP3 at 240MHz. The LTC6431-15 is
housed in a 4mm × 4mm 24-lead QFN package with an
exposed pad for thermal management and low inductance.
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.
Single-Ended IF Amplifier
5V
V_CC = 5V
1000pF
R_SOURCE
50Ω
LTC6431-15
R_F
CHOKE,
560nH
1000pF
R_LOAD
50Ω
643115 TA01a
OIP3 vs Frequency
50
48
46
44
42
40
V_CC = 5V, T = 25°C
38
P_OUT = 2dBm/ TONE
f_SPACE = 1MHz
36 ^{ZIN = ZOUT = 50Ω}
0
200 400 600
FREQUENCY (MHz)
800 1000
643115 TA01b
643115f
1