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| 型號： | AXDA1900DLT3D |
| 英文描述： | Microprocessor |
| 中文描述： | 微處理器 |
| 文件頁數(shù)： | 54/104頁 |
| 文件大?。?/td> | 1769K |
| 代理商： | AXDA1900DLT3D |
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42
Electrical Data
Chapter 8
AMD Athlon XP Processor Model 8 Data Sheet
25175E—November 2002
Preliminary Information
8.13
Thermal Diode Characteristics
The AMD Athlon XP processor model 8 provides a diode that
can be used in conjunction with an external temperature sensor
to determine the die temperature of the processor. The diode
anode (THERMDA) and cathode (THERMDC) are available as
pins on the processor, as described in “THERMDA and
THERMDC Pins” on page 76.
For information about thermal design for the AMD Athlon XP
processor model 8, including layout and airflow considerations,
see the
AMD Processor Thermal, Mechanical, and Chassis Cooling
Design Guide
, order# 23794, and the cooling guidelines on
http://www.amd.com
.
Thermal Diode
Electrical
Characteristics
Table 17 shows the AMD Athlon XP processor model 8
characteristics of the on-die thermal diode. For information
about calculations for the ideal diode equation and
temperature offset correction, see Appendix A, "Thermal
Diode Calculations," on page 77.
Table 17.
Thermal Diode Electrical Characteristics
Symbol
Parameter
Description
Sourcing current
Lumped ideality
factor
Actual ideality factor
Min
Nom
Max
Units
Notes
I
5
300
μA
1
n
f, lumped
1.00000
1.00374
1.00900
2, 3, 4
n
f, actual
R
T
1.00261
3, 4
Series Resistance
0.93
3, 4
Notes:
1. The sourcing current should always be used in forward bias only.
2. Characterized at 95°C with a forward bias current pair of 10
μ
A and 100
μ
A. AMD
recommends using a minimum of two sourcing currents to accurately measure the
temperature of the thermal diode.
3. Not 100% tested. Specified by design and limited characterization.
4. The lumped ideality factor adds the effect of the series resistance term to the actual ideality
factor. The series resistance term indicates the resistance from the pins of the processor to the
on-die thermal diode. The value of the lumped ideality factor depends on the sourcing current
pair used.
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