AD9549/PCBZ Analog Devices Inc, AD9549/PCBZ Datasheet - Page 41

• Manufacturer Part Number: AD9549/PCBZ
• Description: BOARD EVALUATION FOR AD9549
• Manufacturer: Analog Devices Inc

Specifications of AD9549/PCBZ

• Main Purpose: Timing, Clock Generator
• Embedded: No
• Utilized Ic / Part: AD9549
• Primary Attributes: 2 Inputs, 2 Outputs, VCO
• Secondary Attributes: CMOS, HSTL Output Logic, Graphical User Interface
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

THERMAL PERFORMANCE
Table 9. Thermal Parameters
Symbol
θ
θ
θ
θ
θ
Ψ
The AD9549 is specified for a case temperature (T
that T
Use the following equation to determine the junction tempera-
ture on the application PCB:
where:
T
T
center of package.
Ψ
PD is the power dissipation (see the Total Power Dissipation
parameter in the Specifications section).
JA
JMA
JMA
JB
JC
J
CASE
JT
JT
is the junction temperature (°C).
is the value from Table 9.
T
is the case temperature (°C) measured by customer at top
CASE
J
= T
is not exceeded, an airflow source can be used.
CASE
Thermal Characteristic Using a JEDEC51-7 Plus JEDEC51-5 2S2P Test Board
Junction-to-ambient thermal resistance, 0.0 m/sec air flow per JEDEC JESD51-2 (still air)
Junction-to-ambient thermal resistance, 1.0 m/sec air flow per JEDEC JESD51-6 (moving air)
Junction-to-ambient thermal resistance, 2.0 m/sec air flow per JEDEC JESD51-6 (moving air)
Junction-to-board thermal resistance, 1.0 m/sec air flow per JEDEC JESD51-8 (moving air)
Junction-to-case thermal resistance (die-to-heat sink) per MIL-Std 883, Method 1012.1
Junction-to-top-of-package characterization parameter, 0 m/sec air flow per JEDEC JESD51-2 (still air)
+ (Ψ
JT
× PD)
CASE
). To ensure
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Values of θ
design considerations. θ
approximation of T
where T
Values of θ
design considerations when an external heat sink is required.
Values of θ
design considerations.
The values in Table 9 apply to both 64-lead package options.
T
J
= T
A
is the ambient temperature (°C).
JA
A
JC
JB
+ (θ
are provided for package comparison and PCB
are provided for package comparison and PCB
are provided for package comparison and PCB
JA
× PD)
J
by the equation
JA
can be used for a first-order
Value
25.2
22.0
19.8
13.9
1.7
0.1
AD9549
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W