The IDT F1950 Digital-Step-Attenuator featuring Glitch-Free™ technology improves system reliability and settling time.  It has an attenuation range of 31.75 dB with excellent accuracy and very low distortion.


  • Glitch-Free™, < 0.6 dB transient overshoot
  • 150 MHz to 4000 MHz frequency range
  • Spurious Free Design
  • 3V to 5V supply
  • Attenuation Error < 0.3 dB @ 2 GHz
  • Low Insertion Loss < 1.3 dB @ 2 GHz
  • Excellent Linearity +65 dBm IP3I
  • Fast settling time, < 400 nsec
  • Class 2 JEDEC ESD (> 2kV HBM)
  • Serial & Parallel Interface 31.75 dB Range
  • 4x4 mm Thin VFQPFN 24 pin package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Function Carrier Type Buy Sample
F1950NBGI Active NBG24P2 VFQFPN 24 I Yes 7-bit DSA Tray
F1950NBGI8 Active NBG24P2 VFQFPN 24 I Yes 7-bit DSA Reel

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
F1950 Datasheet Datasheet PDF 2.19 MB
Application Notes & White Papers
AT0069 - F1950 Intermodulation Product at 3.5 GHz Application Note PDF 294 KB
AN-896 RF Products EVS Digital Control Software Guide Application Note PDF 2.91 MB
PCN# : A1402-04 Add Alternate Assembly & Test Product Change Notice PDF 45 KB
Digital Step Attenuators Product Overview 日本語, 简体中文 Overview PDF 185 KB
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB

Software & Tools

Title Other Languages Type Format File Size Date
F1950 S-Parameters Model - S-Parameter ZIP 2.17 MB
RF Digital Control Software Installer Software Tool ZIP 169.81 MB

Evaluation Boards

Part Number Title Sort ascending
F1950EVBI Evaluation Board for F1950 7-bit Digital Step Attenuator