LTC6431-20

RECOMMENDED FOR NEW DESIGNS

20dB Gain Block, 50Ω IF Amplifier

Data Sheet (Rev. A) Product Selection Table
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Overview

  • 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

The LTC6431-20 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.

Applications

  • Single-Ended IF Amplifier
  • ADC Driver
  • CATV
LTC6431-20
20dB Gain Block, 50Ω IF Amplifier
Single-Ended IF Amplifier OIP3 vs Frequency Product Package 1
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Documentation

Data Sheet 1

User Guide 1

Application Note 2

Technical Articles 1

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Software Resources

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Tools & Simulations

S-Parameter 1

ADIsimRF

ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.

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Sys-Parameter Models for Keysight Genesys

Sys-Parameter models contain behavioral parameters, such as P1dB, IP3, gain, noise figure and return loss, which describe nonlinear and linear characteristics of a device.

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Evaluation Kits

eval board
schematic 1
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schematic 5
DC2077A

LTC6431-20 Demo Board 50Ω, 20dB Gain Block Demo Board

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Product Details

Demonstration circuit 2077A features the LTC6431-20 50Ω gain block IF amplifier. The LTC6431-20 has a power gain of 20.8dB and it is part of the LTC6431-YY amplifier series.
DC2077A
LTC6431-20 Demo Board 50Ω, 20dB Gain Block Demo Board
DC2077A Demo Board DC2077A Demo Board DC2077A Demo Board DC2077A Demo Board DC2077A - Schematic

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