adsp-21483 Analog Devices, Inc., adsp-21483 Datasheet - Page 58

• Manufacturer Part Number: adsp-21483
• Description: Sharc Processor
• Manufacturer: Analog Devices, Inc.

ADSP-21483/21486/21487/21488/21489
Table 51
transistor model.
Table 51. Thermal Diode Parameters – Transistor Model
1
2
3
I
where I
4
Symbol
I
I
n
R
C
Analog Devices does not recommend operation of the thermal diode under reverse bias.
Not 100% tested. Specified by design characterization.
The ideality factor, nQ, represents the deviation from ideal diode behavior as exemplified by the diode equation:
The series resistance (R
FW
E
Q
T
= I
3, 4
2, 3
1
S
× (e
S
= saturation current, q = electronic charge, V
qVBE/nqkT
contains the thermal diode specifications using the
–1)
T
) can be used for more accurate readings as needed.
Parameter
Forward Bias Current
Emitter Current
Transistor Ideality
Series Resistance
BE
= voltage across the diode, k = Boltzmann Constant, and T = absolute temperature (Kelvin).
Rev. PrA | Page 58 of 66 | March 2010
Min
TBD
TBD
TBD
TBD
Typ
TBD
TBD
Preliminary Technical Data
Max
TBD
TBD
TBD
TBD
Unit
μA
μA
Ω