50MHz – 4GHz PIN Diode Variable Attenuator Module

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The ALM-38140 is a fully matched wideband variable attenuator pin diode module with high linearity performance and high dynamic range.

It is an ideal for gain control in RF amplfier circuits. The typical performance at 1.9GHz.


  • Fully integrated module
  • High dynamic range
  • Excellent Input IP3 performance
  • High Input P1dB compression
  • Low phase shift performance
  • Attenuation : 39dB
  • Insertion Loss : 3.2dB
  • Input IP3 : 50dBm
  • Input P1dB : > 30dBm


  • Broadband system applications; such as CATV, WCDMA, VSAT, WIMAX, Cellular base station.
  • General purpose voltage controlled attenuator for low current applications.
  • Temperature compensation circuitry
  • Automatic Gain Control

Lifecycle Status


Replacement Part

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Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Obsolete
RoHS6 Compliant Y
Distrib. Inventory No
IIP3 (dBm) 50
Attenuation Range (dB) 39
Control Input (Vdc) 0 to +5V
Frequency Range (GHz) 0.05-4
Package SMT 4x4
Obsolescence Notice1 i
Reliability Data Sheet1 i
S-Parameter7 i


Demonstration circuit board for ALM-38140 at 50MHz to 4GHz