adsp-21462w Analog Devices, Inc., adsp-21462w Datasheet - Page 54

• Manufacturer Part Number: adsp-21462w
• Description: Sharc Processor
• Manufacturer: Analog Devices, Inc.

ADSP-21462W/ADSP-21465W/ADSP-21467
THERMAL CHARACTERISTICS
The ADSP-21462W/ADSP-21465W/ADSP-21467 processor is
rated for performance over the temperature range specified in
Operating Conditions on Page
Table 47
JESD51-2 and JESD51-6 and the junction-to-board measure-
ment complies with JESD51-8. Test board design complies with
JEDEC standards JESD51-7 (PBGA). The junction-to-case mea-
surement complies with MIL- STD-883. All measurements use a
2S2P JEDEC test board.
To determine the junction temperature of the device while on
the application PCB, use:
where:
12
10
12
10
Figure 44. Typical Output Delay or Hold vs. Load Capacitance
8
4
8
4
6
2
0
6
2
0
0
0
airflow measurements comply with JEDEC standards
Figure 43. Typical Output Rise/Fall Time (20% to 80%,
50
50
T
J
(at Ambient Temperature)
=
T
TBD
TBD
CASE
V
100
100
DD_EXT
18.
+
= Min)
150
150
JT
P
D
200
200
Rev. PrA | Page 54 of 60 | November 2008
250
250
T
T
package
is the Typical value from
P
Values of
design considerations.
mation of T
where:
T
Values of
design considerations when an external heatsink is required.
Values of
design considerations. Note that the thermal characteristics val-
ues provided in
Table 47. Thermal Characteristics for 324-Lead PBGA
Parameter
D
J
CASE
A
JT
JA
JMA
JMA
JC
= junction temperature C
JT
JMT
JMT
= power dissipation
= ambient temperature C
= junction-to-top (of package) characterization parameter
= case temperature ( C) measured at the top center of the
JA
JC
JB
J
by the equation:
are provided for package comparison and PCB
are provided for package comparison and PCB
are provided for package comparison and PCB
Table 47
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
Preliminary Technical Data
T
J
=
JA
Table
are modeled values.
can be used for a first order approxi-
T
A
+
47.
JA
P
D
Typical
TBD
TBD
TBD
TBD
TBD
TBD
TBD
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W