The F4481 is a 400MHz to 1100MHz Quad Path TX DVGA outfitted with 100Ω differential inputs and 50Ω single-ended outputs. The device is part of a complete family of VGAs targeting FDD and TDD applications within the 400MHz to 4200MHz frequency range. Using a single 3.3V power supply and only 520mA of ICC, the F4481 provides four independent transmit paths, each with 28dB typical maximum gain, +35dBm OIP3, +17dBm output P1dB, and 5.7dB NF. Each channel includes a glitch-free digital step attenuator that reduces gain by up to 31.5dB in precise 0.5dB steps.
 
The F4481 is packaged in an 8 × 8 mm 56-LGA, with matched 100Ω differential input and 50Ω single-ended output impedances for ease of integration into the signal path.
 

Features

  • Independent quad channels for FDD TX applications
  • 400MHz to 1100MHz
  • 28dB typical max gain at 900MHz
    • Precise SPI-controlled Glitch-Free™ gain adjustment
  • 31.5dB gain range with 0.5dB step size
  • 5.7dB NF at 900MHz
  • +35dBm OIP3 at 900MHz
  • +17dBm output P1dB at 900MHz
  • 3.3V supply voltage
  • ICC = 524mA
  • 100Ω differential input impedances
  • 50Ω single-ended output impedances
  • 1.8V and 3.3V logic support
  • Independent channel standby modes for power savings
  • Operating temperature (TEP) range: -40°C to +115°C
  • 8 × 8 mm, 56-LGA package

Product Options

Orderable Part ID Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Package Buy Sample
F4481LKGI Preview LGA 56 I Yes Tray Package Info
Availability
F4481LKGI8 Preview LGA 56 I Yes Reel Package Info
Availability

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
F4481 Short-Form Datasheet Short Form Datasheet PDF 178 KB
Application Notes & White Papers
AN-896 RF Products EVS Digital Control Software Guide Application Note PDF 3.17 MB
Downloads
RF Digital Control Software Installer Software Tool ZIP 169.81 MB
Other
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB

Boards & Kits

Part Number Title Type Company
F4481EVB Evaluation Board for the F4481 DIFF-In / SE-Out Quad Path TX DVGA Evaluation