TX RF VGA with KLIN™ Feature

The F1455 is a High-Gain / High-Linearity 1400 MHz to 2300 MHz TX Variable Gain Amplifier used in transmitter applications. The F1455 TX VGA provides 32 dB maximum gain with +39 dBm OIP3 and 4 dB noise figure. Up to 29.5 dB gain control is achieved using the combination of a digital step attenuator (DSA) plus KLIN™ RF variable gain amplifier gain adjustment. This device uses a single 5 V supply and 216 mA of ICC. This device is packaged in a 6 mm x 6 mm, 28-pin QFN with 50 Ω single-ended RF input and RF output impedances for ease of integration into the signal path.


  • Broadband 1400 MHz to 2300 MHz
  • 32 dB max gain
  • 4 dB NF @ max gain (2000 MHz)
  • KLIN™ amplifier with 6 dB gain range
  • DSA: 23.5 dB range
  • 29.5 dB total gain control range, 0.5 dB step
  • <2 dB overshoot between major gain transitions such as 15.5 dB to 16 dB atten
  • +40 dBm OIP3
  • Maintains +23.5 dBm output P1dB over first 6 dB gain adjustment range
  • SPI interface for DSA control
  • Single 5 V supply voltage
  • ICC = 216 mA
  • Up to +105 °C TCASE operating temperature
  • 50 Ω input and output impedance
  • Standby for power savings
  • Pin compatible 700 MHz and 2700 MHz versions
  • 6 mm x 6 mm, 28-pin QFN package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
F1455NKGK Active NKG28 VFQFPN 28 K Yes Tray Availability
F1455NKGK8 Active NKG28 VFQFPN 28 K Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
F1455 Datasheet REV1 Datasheet PDF 2.77 MB Oct 18, 2016
Application Notes & White Papers
AN-896 RF Products EVS Digital Control Software Guide Application Note PDF 2.91 MB Aug 30, 2015
PCN#A1709-04 Alternate Assembly Location at ASECL on Select Package Product Change Notice PDF 32 KB Oct 25, 2017
The IDT Consumer Products Advantage Overview PDF 4.01 MB Jun 30, 2017
The IDT Automotive Advantage Overview PDF 3.55 MB May 26, 2017
The IDT Communications Products Advantage Overview PDF 2.54 MB Feb 13, 2017
RF Products Family 日本語, 简体中文 Overview PDF 768 KB Feb 17, 2017
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB Nov 29, 2016
F1455 S-Parameters Model - S-Parameter ZIP 1.27 MB Sep 21, 2016

Software & Tools

Title Other Languages Type Format File Size Date
RF Digital Control Software Installer Software Tool ZIP 169.81 MB Aug 30, 2015

Evaluation Boards

Part Number Title Sort ascending
F1455EVBK Evaluation Board for F1455 TX VGA