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F1455 Block Diagram
F1455 Pinout
F1455 Control Pin Interface


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 KLINRF 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 Specification

Input Freq (MHz)Output Freq Range (MHz)Supply Voltage (V)Pkg. TypeLead Count (#)Output IP3 (dBm)Gain (dB)Gain Resolution (dB)
1400.000000 - 2300.0000001400.000000 - 2300.0000005.00VFQFPN2839.0032.000.50

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
F1455NKGKActiveNKG28VFQFPN28KYesTrayCheck Availability
F1455NKGK8ActiveNKG28VFQFPN28KYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Apps Notes & White Papers
AN-896 RF Products EVS Digital Control Software Guide Application Note PDF 2.91 MB Aug 31, 2015
F1455 S-Parameters Model - S-Parameter ZIP 1.27 MB Sep 22, 2016
RF Products Family Overview 简体中文, 日本語 Overview PDF 1.49 MB May 23, 2016
IDT Products for Radio Applications 日本語 Product Brief PDF 4.65 MB Aug 12, 2015

Software & Tools

Title Type Format File Size Datesort icon
RF Digital Control Software Installer Software Tool ZIP 169.81 MB Aug 31, 2015

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