Description
Avago Technologies’ ALM-38140 is a fully matched wideband variable attenuator module with high linearity performance and high dynamic range. The high dynamic range and low phase shift can be achieved with only one external inductor place between Linput and Loutput.
ALM-38140 is a fully integrated solution using Avago Technologies’ low distortion silicon PIN diodes housed in a miniature 3.8 x 3.8 x 1.0 mm3 MCOB (Multiple-Chips-On-Board) package.
This variable attenuator module is easily operated with a constant voltage, Vsupply = 2.7V and a control voltage, Vcontrol = 1 – 5V. No external biasing components needed.
ALM-38140 is ideal for gain control in RF amplifier circuits.

FEATUREs
• Fully integrated module
• High dynamic range
• Excellent Input IP3 performance
• High Input P1dB compression
• Low phase shift performance
• Tape-and-Reel packaging option available

Specifications
Typical Performance at 1.9GHz
• Attenuation : 39dB
• Insertion Loss : 3.2dB
• Input IP3 : 50dBm
• Input P1dB : > 30dBm

APPLICATIONs
• 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