The F1431B is a high linearity RF Digital Variable Gain Amplifier, (DVGA) used as the power amplifier driver in transmitter applications. The F1431B provides 14dB gain, +41.1dBm OIP3, and a 4.2dB noise figure (NF) at 2.0GHz. The digital step attenuator (DSA) has 23dB range with a 0.5dB step size and operates from 0.35GHz to 3GHz with one tuning circuit. This device uses a single 5V supply and 150mA of current.


  • 0.35GHz to 3GHz operating range
  • 14.3dB typical gain at 2GHz
  • Glitch-Free™ 23dB gain adjustment
  • 0.5dB step size
  • 4.2dB NF at 2GHz
  • +41.1dBm OIP3 at 2GHz
  • +23.3dBm output P1dB at 2GHz
  • Single 5V supply voltage
  • IDD = 150mA
  • 50Ω single-ended input / output impedances
  • 1.8V and 3.3V logic support
  • Standby Mode for power savings
  • Operating temperature (TCASE) range: -40°C to +105°C
  • 4 × 4 mm, 24-TQFN package

Product Options

Orderable Part ID Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active VFQFPN 24 K Yes Tray
Active VFQFPN 24 K Yes Reel

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
F1431B Datasheet Datasheet PDF 2.82 MB
User Guides & Manuals
RF Product Selection Guide Guide PDF 1.18 MB
RF Digital Control Software Installer Software Tool ZIP 169.81 MB
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB

Boards & Kits

Part Number Title Type Company
F1431BEVB Evaluation Board for the F1431B High Linearity RF DVGA Evaluation