Q62702-G0080 Просмотр технического описания (PDF) - TriQuint Semiconductor

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Q62702-G0080

GaAs MMIC

TriQuint Semiconductor 

GaAs MMIC

CGY 196

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from the following diagram to get a specific value.

Pulse factor:

Ptot-max should not exceed the absolute maximum rating for the dissipated power PPulse = ” Pulse peak power

” =2W

c) Reliability Considerations

This procedure yields the upper limit for the power dissipation for continuous wave (cw) and pulse

applications which corresponds to the maximum allowed channel temperature. For best reliability keep the

channel temperature low. The following formula allows to track the individual contributions which determine

the channel temperature.

Tch

=

Channel temperature

(= junction

temperature)

( Pdiss / Pulse Factor x RthChS ) +

Power dissipated in the chip,

divided by the applicable puls

factor ( = 1 for DC and CW ). It

does not contain decoupled

RF- power

Rth of device from channel

to soldering point

TS

Temperature of soldering

point, measured or

calculated

TriQuint Semiconductor Europe

October 1st, 2002

page 4 4/18

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