cha2411-qdg United Monolithic Semiconductors, cha2411-qdg Datasheet - Page 3

• Manufacturer Part Number: cha2411-qdg
• Description: 20-25ghz Low Noise Amplifier
• Manufacturer: United Monolithic Semiconductors

20-25GHz Low Noise Amplifier
Device thermal performances
All the figures given in this section are obtained assuming that the QFN device is cooled down
only by conduction through the package thermal pad (no convection mode considered).
The temperature is monitored at the package back-side interface (Tcase) as shown below.
The system maximum temperature must be adjusted in order to guarantee that Tcase remains
below than the maximum value specified in the next table. So, the system PCB must be
designed to comply with this requirement.
A derating must be applied on the dissipated power if the Tcase temperature can not be
maintained below than the maximum temperature specified (see the curve Pdiss. Max) in order
to guarantee the nominal device life time (MTTF).
Ref. : DSCHA2411-QDG8333 - 28 Nov 08
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE
-50
(1) Derating at junction temperature constant = Tj max
(2) Rth J-C is calculated for a worst case where the hotter junction of the MMIC is considered.
(3) Tcase=Package back side temperature measured under the die-attach-pad (see the drawing below).
Recommanded max. junction temperature (Tj max)
Junction temperature absolute maximum rating
Max. continuous dissipated power @ Tcase=
Junction-Case thermal resistance (Rth J-C)
Min. package back side operating temperature
Max. package back side operating temperature
Min. storage temperature
Max. storage temperature
Tel.: [phone] - Fax : [phone]
-25
Pdiss. Max. (W)
=> Pdiss derating above Tcase
DEVICE THERMAL SPECIFICATION : CHA2411-QDG
0
25
Tcase (° C)
50
3/10
75
(1)
100
(2)
=
(3)
(3)
105 ° C :
105 ° C :
125
Specifications subject to change without notice
150
:
:
:
:
:
:
:
0,3
0,25
0,2
0,15
0,1
0,05
0
0,27 5 W
<143 ° C/W
145 °C
175 ° C
105 ° C
125 ° C
CHA2411-QDG
-40 ° C
-55 ° C
7 mW/° C
reference point (Tcase) location.
back-side view, temperature
Example of QFN 16L 3x3
Tcase
5.6