DEVICE DESCRIPTION

The ZNBG series of devices are designed to meet the bias requirements of GaAs and HEMT FETs commonly used in satellite receiver LNBs, PMR, cellular telephones etc. with a minimum of external components.

With the addition of two capacitors and a resistor the devices provide drain voltage and current control for 3 external grounded source FETs, generating the regulated negative rail required for FET gate biasing whilst operating from a single supply. This negative bias, at -3 volts, can also be used to supply other external circuits.

FEATURES

• Provides bias for GaAs and HEMT FETs

• Drives up to three FETs

• Dynamic FET protection

• Drain current set by external resistor

• Regulated negative rail generator requires only 2 external capacitors

• Choice in drain voltage

• Wide supply voltage range

• QSOP surface mount package

APPLICATIONS

• Satellite receiver LNBs

• Private mobile radio (PMR)

• Cellular telephones

• Single in single out C Band LNB