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ADSP-BF533 Datasheet(PDF) 49 Page - Analog Devices

Part No. ADSP-BF533
Description  Blackfin Embedded Processor
Download  64 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADSP-BF533 Datasheet(HTML) 49 Page - Analog Devices

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ADSP-BF531/ADSP-BF532/ADSP-BF533
Rev. I
|
Page 49 of 64
|
August 2013
THERMAL CHARACTERISTICS
To determine the junction temperature on the application
printed circuit board, use:
where:
TJ = Junction temperature (°C).
TCASE = Case temperature (°C) measured by customer at top
center of package.
JT = From Table 38 through Table 40.
PD = Power dissipation (see the power dissipation discussion
and the tables on 23 for the method to calculate PD).
Values of JA are provided for package comparison and printed
circuit board design considerations. JA can be used for a first
order approximation of TJ by the equation:
where:
TA = ambient temperature (°C).
In Table 38 through Table 40, airflow measurements comply
with JEDEC standards JESD51–2 and JESD51–6, and the junc-
tion-to-board measurement complies with JESD51–8. The
junction-to-case measurement complies with MIL-STD-883
(Method 1012.1). All measurements use a 2S2P JEDEC test
board.
Thermal resistance JA in Table 38 through Table 40 is the figure
of merit relating to performance of the package and board in a
convective environment. JMA represents the thermal resistance
under two conditions of airflow. JT represents the correlation
between TJ and TCASE.
TJ
TCASE
JT
PD

+
=
TJ
TA
JA
PD

+
=
Table 38. Thermal Characteristics for BC-160 Package
Parameter
Condition
Typical
Unit
JA
0 Linear m/s Airflow
27.1
°C/W
JMA
1 Linear m/s Airflow
23.85
°C/W
JMA
2 Linear m/s Airflow
22.7
°C/W
JC
Not Applicable
7.26
°C/W
JT
0 Linear m/s Airflow
0.14
°C/W
JT
1 Linear m/s Airflow
0.26
°C/W
JT
2 Linear m/s Airflow
0.35
°C/W
Table 39. Thermal Characteristics for ST-176-1 Package
Parameter
Condition
Typical
Unit
JA
0 Linear m/s Airflow
34.9
°C/W
JMA
1 Linear m/s Airflow
33.0
°C/W
JMA
2 Linear m/s Airflow
32.0
°C/W
JT
0 Linear m/s Airflow
0.50
°C/W
JT
1 Linear m/s Airflow
0.75
°C/W
JT
2 Linear m/s Airflow
1.00
°C/W
Table 40. Thermal Characteristics for B-169 Package
Parameter
Condition
Typical
Unit
JA
0 Linear m/s Airflow
22.8
°C/W
JMA
1 Linear m/s Airflow
20.3
°C/W
JMA
2 Linear m/s Airflow
19.3
°C/W
JC
Not Applicable
10.39
°C/W
JT
0 Linear m/s Airflow
0.59
°C/W
JT
1 Linear m/s Airflow
0.88
°C/W
JT
2 Linear m/s Airflow
1.37
°C/W


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