ADSP-21266SKBC-2B AD [Analog Devices], ADSP-21266SKBC-2B Datasheet - Page 38

• Manufacturer Part Number: ADSP-21266SKBC-2B
• Description: SHARC Embedded Processor
• Manufacturer: AD [Analog Devices]

ADSP-21266
ENVIRONMENTAL CONDITIONS
The ADSP-21266 processor is rated for performance under
T
Operating Conditions on Page
THERMAL CHARACTERISTICS
Table 33
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
Ψ
the typical value from
P
Values of θ
design considerations. θ
mation of T
D
AMB
J
CASE
JT
= junction temperature (°C)
= power dissipation (see EE Note No. 216)
= junction-to-top (of package) characterization parameter is
environmental conditions specified in the
= case temperature (°C) measured at the top center of the
Figure 33. Typical Output Delay or Hold vs. Load Capacitance
10
–2
–4
8
6
4
2
0
and
0
JA
J
by the equation
are provided for package comparison and PCB
Table 34
Y = 0.0488X – 1.5923
T
J
T
(at Ambient Temperature)
=
50
J
Table 33
airflow measurements comply with
=
JA
T
CASE
can be used for a first order approxi-
T
LOAD CAPACITANCE (pF)
A
+
15.
and
+
(
θ
(
100
JA
Ψ
Table
JT
×
P
×
D
P
34.
)
D
)
150
Recommended
Rev. B | Page 38 of 44 | May 2005
200
where:
T
Values of θ
design considerations when an external heat sink is required.
Table 33. Thermal Characteristics for 136-Ball BGA
Table 34. Thermal Characteristics for 144-Lead LQFP
Parameter
θ
θ
θ
θ
Ψ
Ψ
Ψ
Parameter
θ
θ
θ
θ
Ψ
Ψ
Ψ
A
JA
JMA
JMA
JC
JA
JMA
JMA
JC
JT
JMT
JMT
JT
JMT
JMT
= ambient temperature °C
JC
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
Typical
31.0
27.3
26.0
6.99
0.16
0.30
0.35
Typical
32.5
28.9
27.8
7.8
0.5
0.8
1.0
Unit
°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