cha4105-qdg United Monolithic Semiconductors, cha4105-qdg Datasheet - Page 3

• Manufacturer Part Number: cha4105-qdg
• Description: 2-4ghz Driver Gaas Monolithic Microwave Ic In Smd Leadless Package
• Manufacturer: United Monolithic Semiconductors

2-4GHz Driver
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. : DSCH4105-QDG0329 - 25 Nov 10
Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE
-50
Tel.: [phone] - Fax: [phone]
(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).
Recommended 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
-25
Pdiss. Max. (W)
=> Pdiss derating above Tcase
DEVICE THERMAL SPECIFICATION : Product name
0
25
Tcase (° C)
50
3/12
(1)
75
(2)
=
(3)
(3)
83 ° C :
83 ° C :
100
Specifications subject to change without notice
:
:
:
:
:
:
:
125
1,6
1,4
1,2
1
0,8
0,6
0,4
0,2
0
CHA4105-QDG
175 °C
175 ° C
<65 ° C/W
125 ° C
1,4 W
-40 ° C
-55 ° C
15 mW/° C
83 ° C
reference point (Tcase) location.
back-side view, temperature
Example of QFN 16L 3x3
Tcase
5,8