ATEVK1105 Atmel, ATEVK1105 Datasheet - Page 787

• Manufacturer Part Number: ATEVK1105
• Description: KIT EVAL FOR AT32UC3A0
• Manufacturer: Atmel
• Series: AVR®32r
• Type: MCUr

Specifications of ATEVK1105

• Contents: Evaluation Board, Software and Documentation
• Processor To Be Evaluated: AT32UC3A0512
• Processor Series: AVR
• Data Bus Width: 32 bit
• Interface Type: USART, TWI, USB, SPI, Ethernet
• Operating Supply Voltage: 3.3 V
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Core Sub-architecture: AVR UC3
• Silicon Core Number: AT32UC3A0512
• Silicon Family Name: AVR
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT32UC3A0
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

39. Mechanical Characteristics
39.1
39.1.1
39.1.2
32058J–AVR32–04/11
Thermal Considerations
Thermal Data
Junction Temperature
Table 39-1
Table 39-1.
The average chip-junction temperature, T
where:
• θ
• θ
• θ
• P
• T
From the first equation, the user can derive the estimated lifetime of the chip and decide if a
cooling device is necessary or not. If a cooling device is to be fitted on the chip, the second
equation should be used to compute the resulting average chip-junction temperature T
Symbol
θ
θ
θ
θ
1.
2.
787.
Table 39-1 on page
Consumption” on page
JA
JC
JA
JC
JA
JC
HEAT SINK
A
D
= ambient temperature (°C).
= device power consumption (W) estimated from data provided in the section
= package thermal resistance, Junction-to-ambient (°C/W), provided in
= package thermal resistance, Junction-to-case thermal resistance (°C/W), provided in
T
T
J
J
=
=
T
summarizes the thermal resistance data depending on the package.
= cooling device thermal resistance (°C/W), provided in the device datasheet.
T
A
A
Parameter
Junction-to-ambient thermal resistance
Junction-to-case thermal resistance
Junction-to-ambient thermal resistance
Junction-to-case thermal resistance
+
Thermal Resistance Data
+
P (
(
P
D
D
× (
×
θ
787.
θ
HEATSINK
JA
767.
)
+
θ
JC
) )
J
, in °C can be obtained from the following:
Condition
Still Air
Still Air
TQFP100
TQFP100
LQFP144
LQFP144
Package
AT32UC3A
Table 39-1 on page
43.4
39.8
Typ
5.5
8.9
”Power
J
⋅C/W
⋅C/W
in °C.
Unit
787