LTC6431-20 - 20dB Gain Block, 50Ω IF Amplifier

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.

Features
  • 50Ω Matched 20MHz to 1400MHz
  • 20.8dB Power Gain
  • 46.2dBm OIP3 at 240MHz Into 50Ω
  • NF = 2.6dB at 240MHz
  • 0.6nV/√Hz Total Input Noise
  • S11 < –10dB Up to 2.0GHz
  • S22 < –10dB Up to 1.4GHz
  • >2.0VP-P Linear Output Swing
  • P1dB = 22.0dBm
  • 50Ω Single-Ended Input/Output
  • Insensitive to VCC Variation
  • A-Grade 100% OIP3 Tested at 240MHz
  • Input/Output Internally Matched to 50Ω
  • Single 5V Supply
Typical Application
LTC6431-20 Typical Application
LTC6431-20 Typical Application
Applications
  • Single-Ended IF Amplifier
  • ADC Driver
  • CATV
Packaging
LTC6431-20 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC6431AIUF-20#PBF4x4 QFN-24I$6.99$4.89
LTC6431AIUF-20#TRPBF4x4 QFN-24I$4.95
LTC6431BIUF-20#PBF4x4 QFN-24I$2.70$1.89
LTC6431BIUF-20#TRPBF4x4 QFN-24I$1.95
Demo Boards
Part NumberDescriptionPrice
DC2077ALTC6431-20 Demoboard 50ohm, 20dB Gain Block Demo Board$150.00
Datasheet
Product Selector Card
Press Release
Software and Simulation
CAD Symbol
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LTC6431-20 - 20dB Gain Block, 50Ω IF Amplifier
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50Ω 20dB Gain Block Delivers 46dBm OIP3 & 2.6dB NF with Bandwidth from 20MHz to 2GHz
LTC6431-20 S-Parameters
LTC6431-20 Footprints and Symbols