Diode's ZABG4003, ZABG6003, and ZABG6004 are low-power, programmable depletion mode FET bias controllers intended primarily for satellite low noise blocks (LNBs). Designed to provide system flexibility, the devices can be programmed to bias up to four (ZABG4003) or six (ZABG6003/ZABG6004) low noise amplifier (LNA) stages. The bias controllers operate with a minimal current of only 1 mA and can operate over a supply voltage of 2.1 V to 5.5 V making them ideal for low-power designs. The small package and reduced component count minimize the PCB area while enhancing overall LNB reliability.

Features

• Programmable GaAs FET LNA
  • Provides either up to four or six independent bias stages for GaAs and HEMT FET LNAs
  • Independent user programmable drain current for the LNAs and active mixers

• Low current operation, wide supply and temperature range
  • Operates from 2.1 V to 5.5 V rails over -40°C to +105°C
  • Designed for 3 V / 3.3 V / 5 V low power LNBs
  • Allows pairs of FETs to be switched off for intelligent LNB systems

• Small and flexible solution
  • Minimal application circuit while allowing system flexibility
  • Packaged in the small 3 mm x 3 mm QFN package for minimal PCB space the standard QSOP20

Applications

• Twin, quad, and US market LNBs
• PMR
• Microwave links
• General high-frequency communications