Diodes' 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 minimizes the PCB area while enhancing overall LNB reliability. A flexible solution allowing LNB designers to choose solutions for several system designs while taking advantage of its advanced FET protection, higher performance, and low current operation.

Features and Benefits

• A flexible solution allowing LNB designers to choose solutions for several system designs while taking advantage of its advanced FET protection, higher performance, and low current operation
• 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 solutions
  • Minimal applications circuit while allowing system flexibility
  • Packaged in the small 3 mm x 3 mm QFN package for minimal PCB