Fujifilm Xeon 5050 S26361-F3248-L300 데이터 시트

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Dual-Core Intel® Xeon® Processor 5000 Series Datasheet

between n

trim 

and the actual ideality of the particular processor will be calculated. This 

value (Tdiode_Offset) will be programmed into the new diode correction MSR and then 
added to the Tdiode_Base value can be used to correct temperatures read by diode 
based temperature sensing devices. 

If the n

trim 

value used to calculating Tdiode_Offset differs from the n

trim 

value used in a 

temperature sensing device, the T

error(nf) 

may not be accurate. If desired, the 

Tdiode_Offset can be adjusted by calculating n

actual 

and then recalculating the offset 

using the actual n

trim 

as defined in the temperature sensor manufacturers’ datasheet. 

The parameters

 

used to calculate the Thermal Diode (Tdiode) Correction Factor are 

listed in 

. For Dual-Core Intel Xeon Processor 5000 series, the range of 

Tdiode Correction Factor is ±14°C. 

.

1.

Intel does not support or recommend operation of the thermal diode under reverse bias.

2.

Characterized across a temperature range of 50-80°C.

3.

Not 100% tested. Specified by design characterization.

4.

The ideality factor, n, represents the deviation from ideal diode behavior as exemplified by the diode 

equation: I

FW

 = I

S

 * (e

qVD/nkT

 - 1)

Where I

S

 = saturation current, q = electronic charge, V

D

 = voltage across the diode, k = Boltzmann 

Constant, and T = absolute temperature (Kelvin).

5.

The series resistance, R

T

, is provided to allow for a more accurate measurement of the junction 

temperature. R

T

, as defined, includes the lands of the processor but does not include any socket resistance 

or board trace resistance between the socket and external remote diode thermal sensor. R

T

 can be used by 

remote diode thermal sensors with automatic series resistance cancellation to calibrate out this error term. 

Another application is that a temperature offset can be manually calculated and programmed into an offset 

register in the remote diode thermal sensors as exemplified by the equation: 

Terror = [R

T

 * (N-1) * I

FW

min] / [nk/q *ln N]

Where Terror=sensor temperature error, N=sensor current ratio, k=Boltzmann Constant, q=electronic 

charge.

I

FW

Forward Bias Current

5

-

200

µA

1

n

Diode Ideality Factor

1.000

1.009

1.050

-

2, 3, 4

R

T

Series Resistance

2.79

4.52

6.24

Ω

2, 3, 5