adsp-21267skstz Analog Devices, Inc., adsp-21267skstz Datasheet - Page 37

• Manufacturer Part Number: adsp-21267skstz
• Description: Sharc Processor
• Manufacturer: Analog Devices, Inc.

ENVIRONMENTAL CONDITIONS
The ADSP-21267 processor is rated for performance over the
commercial temperature range, T
THERMAL CHARACTERISTICS
The ADSP-21267 is offered in 144-lead LQFP and 136-ball BGA
packages
Table 31
JEDEC standards JESD51-2 and JESD51-6 and the junction-to-
board measurement complies with JESD51-8. The junction-to-
case measurement complies with MIL- STD-883. All measure-
ments use a 2S2P JEDEC test board.
To determine the Junction Temperature of the device while on
the application PCB, use:
Where:
T
T
package
= Typical value from the tables below
P
Values of
design considerations.
tion of T
D
J
CASE
= Junction temperature
JT
= Power dissipation see EE Note #216
= Junction-to-Top (of package) characterization parameter
= Case temperature (
Figure 33. Typical Output Delay or Hold vs. Load Capacitance
J
and
-4
-1
-2
-3
by the equation:
7
6
4
0
5
3
2
1
JA
0
are provided for package comparison and PCB
Table 32
T
J
20
T J
=
(at Ambient Temperature)
airflow measurements comply with
T
=
JA
CASE
T A
0
can be used for a 1
LOAD CAPACITANCE - pF
0
40
C
C) measured at the top center of the
TBD
+
PRELIMINARY TECHNICAL DATA
+
AMB
JA
60
JT
= 0°C to 70°C.
PD
PD
80
st
order approxima-
100
Rev. PrA | Page 37 of 44 | January 2004
120
Where:
T
Values of
design considerations when an external heatsink is required.
Values of
design considerations.
Table 31. Thermal Characteristics for 136 Ball BGA
Table 32. Thermal Characteristics for 144 Lead LQFP
Parameter
Parameter
A
JA
JMA
JMA
JB
JC
JA
JMA
JMA
JC
JT
JMT
JMT
JT
JMT
JMT
= Ambient Temperature
JC
JB
are provided for package comparison and PCB
are provided for package comparison and PCB
Condition
Airflow = 0 m/s
Airflow = 1 m/s
Airflow = 2 m/s
Airflow = 0 m/s
Airflow = 1 m/s
Airflow = 2 m/s
Airflow = 0 m/s
Airflow = 1 m/s
Airflow = 2 m/s
Airflow = 0 m/s
Airflow = 1 m/s
Airflow = 2 m/s
0
C
Typical
28.2
24.4
23.3
20.1
7.0
0.1
0.3
0.4
Typical
32.5
28.9
27.8
7.8
0.5
0.8
1.0
ADSP-21267
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W