ADSP-BF531/ADSP-BF532/ADSP-BF533
Table 38. Thermal Characteristics for BC-160 Package
THERMAL CHARACTERISTICS
To determine the junction temperature on the application
printed circuit board, use:
Parameter Condition
Typical Unit
JA
0 Linear m/s Airflow
27.1
23.85
22.7
7.26
0.14
0.26
0.35
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
TJ = TCASE + JT PD
JMA
JMA
JC
1 Linear m/s Airflow
2 Linear m/s Airflow
Not Applicable
where:
TJ = Junction temperature (°C).
T
CASE = Case temperature (°C) measured by customer at top
JT
JT
JT
0 Linear m/s Airflow
1 Linear m/s Airflow
2 Linear m/s Airflow
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).
Table 39. Thermal Characteristics for ST-176-1 Package
Parameter Condition Typical Unit
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:
JA
0 Linear m/s Airflow
34.9
33.0
32.0
0.50
0.75
1.00
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
TJ = TA + JA PD
JMA
JMA
JT
JT
JT
1 Linear m/s Airflow
2 Linear m/s Airflow
0 Linear m/s Airflow
1 Linear m/s Airflow
2 Linear m/s Airflow
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.
Table 40. Thermal Characteristics for B-169 Package
Parameter Condition Typical Unit
JA
0 Linear m/s Airflow
22.8
20.3
19.3
10.39
0.59
0.88
1.37
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
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
JMA
JMA
JC
1 Linear m/s Airflow
2 Linear m/s Airflow
Not Applicable
between TJ and TCASE
.
JT
JT
JT
0 Linear m/s Airflow
1 Linear m/s Airflow
2 Linear m/s Airflow
Rev. I
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Page 49 of 64
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August 2013
ADI [ ADI ]
