LTC6430-20 - High Linearity Differential RF/IF Amplifier/ADC Driver


  • 51.0dBm OIP3 at 240MHz into a 100Ω Diff Load
  • NF = 2.9dB at 240MHz
  • 20MHz to 2060MHz –3dB Bandwidth
  • 20.8dB Gain
  • A-Grade 100% OIP3 Tested at 380MHz
  • 0.6nV/√Hz Total Input Noise
  • S11 < –10dB Up to 1.4GHz
  • S22 < –10dB Up to 1.4GHz
  • >2.75VP-P Linear Output Swing
  • P1dB = 24.0dBm
  • Insensitive to VCC Variation
  • 100Ω Differential Gain-Block Operation
  • Input/Output Internally Matched to 100Ω Diff
  • Single 5V Supply
  • DC Power = 850mW
  • 4mm × 4mm, 24-Lead QFN Package

Typical Application

LTC6430-20 Typical Application
LTC6430-20 Typical Application


The LTC®6430-20 is a differential gain block amplifier designed to drive high resolution, high speed ADCs with excellent linearity beyond 1000MHz and with low associated output noise. The LTC6430-20 operates from a single 5V power supply and consumes only 850mW.

In its differential configuration, the LTC6430-20 can directly drive the differential inputs of an ADC. Using 1:2 baluns, the device makes an excellent 50Ω wideband balanced amplifier. While using 1:1.33 baluns, the device creates a high fidelity 40MHz to 1000MHz 75Ω CATV amplifier.

The LTC6430-20 is designed for ease of use, requiring a minimum of support components. The device is internally matched to 100Ω differential source/load impedance. Onchip bias and temperature compensation ensure consistent performance over environmental changes.

The LTC6430-20 uses a high performance SiGe BiCMOS process for excellent repeatability compared with similar GaAs amplifiers. All A-grade LTC6430-20 devices are tested and guaranteed for OIP3 at 380MHz. The LTC6430-20 is housed in a 4mm × 4mm, 24-lead, QFN package with an exposed pad for thermal management and low inductance. A single-ended 50Ω IF gain block with similar performance is also available, see the related LTC6431-20.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC6430AIUF-20#PBF 4x4 QFN-24 UF I 05-08-1697 Yes
LTC6430AIUF-20#TRPBF 4x4 QFN-24 UF I 05-08-1697 Yes
LTC6430BIUF-20#PBF 4x4 QFN-24 UF I 05-08-1697 Yes
LTC6430BIUF-20#TRPBF 4x4 QFN-24 UF I 05-08-1697 Yes

LTC6430-20 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC6430AIUF-20#PBF 4x4 QFN-24 I $8.95 $6.44 Yes
LTC6430AIUF-20#TRPBF 4x4 QFN-24 I $6.50 Yes
LTC6430BIUF-20#PBF 4x4 QFN-24 I $5.13 $3.69 Yes
LTC6430BIUF-20#TRPBF 4x4 QFN-24 I $3.75 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC2076A-A LTC6430-20 Demo Board | Optimized 50MHz TO 350MHz Differential ADC Driver, IF/RF Amplifier $250.00
DC2076A-B LTC6430-20 Demo Board | Optimized 300MHz TO 1000MHz Differential ADC Driver, IF/RF Amplifier $250.00
DC2078A LTC6430-20 Demo Board | 50MHz TO 1000MHz 75Ω Input/Output CATV Amplifier $250.00
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Click here to view our complete list of demo boards


  • Differential ADC Driver
  • Differential IF Amplifier
  • OFDM Signal Chain Amplifier
  • 50Ω Balanced IF Amplifier
  • 75Ω CATV Amplifier
  • 700MHz to 800MHz LTE Amplifier
  • Low Phase Noise Clock or LO Amplifier

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Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

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