FMM5820QH Datasheet, PDF (12/14 Pages) Eudyna Devices Inc – Ka-Band Power Amplifier MMIC

FMM5820QH
Ka-Band Power Amplifier MMIC
■ Mounting Instructions for QH Package
(1) The package may be attached using screws. Torque conditions are shown in Table 1.
Table 1. Recommended and Maximum Torque for Screw Mounting
Package
Recommended
screw
Recommended
Torque
QH
M1.6*
15 N-cm (1.3 lb-in)
*Mounting with flat washer is recommended.
Maximum Torque
20 N-cm (1.8 lb-in)
(2) First, tighten the screws with a torque driver set to 5 N-cm.
(3) The surface finish of the heat sink should be better than 0.8µm, and the surface flatness
must be better than 10 µm.
(4) Silicon based heat sink compounds should not be used for the thermal conductive grease.
They cause poor grounding of the source flange, contamination and long term degradation
of thermal resistance between the MMIC package and the heat sink.
(5) The DC and RF interconnects may be gold bondwires or gold ribbons. The RF interconnects
should be as short as possible.
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