The IDT F1953 Digital-Step-Attenuator featuring Glitch-Free™ technology improves system reliability and settling time.  It has an attenuation range of 31.5 dB with excellent accuracy and very low distortion.  In addition, it features internal DC blocking capacitors to reduce the system's bill-of-materials.


  • Glitch-Free™, < 0.6 dB transient overshoot
  • Spurious Free Design
  • 2.7 to 3.3 V supply
  • Attenuation Error < 0.5 dB @ 2 GHz
  • Low Insertion Loss < 1.4 dB @ 2 GHz
  • Excellent Linearity >+63 dBm IP3I
  • Fast settling time, < 400 nsec
  • Class 2 JEDEC ESD (> 2kV HBM)
  • Serial or Parallel Interface 31.5 dB Range
  • Stable Integral Non-Linearity over temperature
  • Low Power Consumption < 200 uA
  • Integrated DC blocking capacitors
  • Drop-In replacement
  • 4x4 mm Thin VFQFPN 20 pin package


Product Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active VFQFPN 20 I Yes Tray
Active VFQFPN 20 I Yes Reel

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
F1953 Datasheet Datasheet PDF 1.46 MB
User Guides & Manuals
RF Product Selection Guide Guide PDF 3.64 MB
Application Notes & White Papers
AN-896 RF Products EVS Digital Control Software Guide Application Note PDF 3.17 MB
PCN# : A1402-04 Add Alternate Assembly & Test Product Change Notice PDF 45 KB
RF Digital Control Software Installer Software Tool ZIP 169.81 MB
Digital Step Attenuators 日本語, 简体中文 Product Brief PDF 1.07 MB

Boards & Kits

Part Number Title Type Company
F1953EVBI Evaluation Board for F1953 6-bit Digital Step Attenuator Evaluation Renesas