XP1042-QT Datasheet, PDF (5/6 Pages) Mimix Broadband – 12.0-16.0 GHz Power Amplifier QFN, 3x3mm

XP1042-QT
Power Amplifier
12.0-16.0 GHz
Rev. V1
App Note [1] Biasing - As shown in the Pin Designations table, the device is operated by biasing VD1,2,3 at
5.0V with 125, 125, 250 mA respectively. It is recommended to use active bias to keep the currents constant in
order to maintain the best performance over temperature. Depending on the supply voltage available and the
power dissipation constraints, the bias circuit may be a single transistor or a low power operational amplifier,
with a low value resistor in series with the drain supply used to sense the current. The gate of the pHEMT is con-
trolled to maintain correct drain current and thus drain voltage. The typical gate voltage needed to do this is -
1.0V. Make sure to sequence the applied voltage to ensure negative gate bias is available before applying the
positive drain supply.
App Note [2] Board Layout - As shown in the board layout, it is recommended to provide 100pF decoupling
caps as close to the bias pins as possible, with additional 10μF decoupling caps.
Recommended Layout
5
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