The F1956 is part of a family of Glitch-FreeTM DSAs which offers very high reliability due to its monolithic silicon die construction in a compact 5 x 5 mm 32-pin TQFN package.  It has very low insertion loss is with minimal distortion and is designed with a 50Ω input and output impedance. Additionally the device is designed to have high accurate which improves SNR and/or ACLR by ensuring the system gain is achieved as close to targeted as possible.


  • Serial and 7-bit Parallel Interface 
  • 31.75dB Range
  • 0.25dB steps
  • Glitch-Free™: < 2dB transient ringing
  • 500ns settling time
  • Ultra linear +64dBm IP3
  • Low Insertion Loss < 1.3dB at 4GHz
  • Attenuation error < 0.6dB at 4GHz
  • 3.3V or 5V Supply
  • 1.8V or 3.3V control logic
  • -40°C to +105°C operating temperature
  • 5 x 5 mm, 32-pin TQFN package

tuneProduct Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active VFQFPN 32 I Yes Tray
Active VFQFPN 32 I Yes Reel


Title language Type Format File Size Date
Datasheets & Errata
star F1956 Datasheet Datasheet PDF 6.75 MB
User Guides & Manuals
RF Product Selection Guide Guide PDF 1015 KB
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
Digital Step Attenuators Product Brief PDF 1.07 MB


Title language Type Format File Size Date
RF Digital Control Software Installer Software Tool ZIP 169.81 MB
F1956 S-parameters Model - S-Parameter ZIP 5.40 MB

memoryBoards & Kits

Part Number Title Type Company
F1956EVBI Evaluation Board for F1956 7-bit Digital Step Attenuator Evaluation Renesas