Datasheet

V
(TEMP=120 or 125)
= 2119 - 10.36 x T
DIE
V
(TEMP=105)
= 1590 ± 7.77 x T
DIE
V
(TEMP=120 or 125)
= 1814.6 - 10.270 x (T
DIE
- 30°C) - 2.12e-3 x (T
DIE
- 30°C)
2
V
(TEMP=105)
= 1361.4 ± 7.701 x (T
DIE
- 30°C) ± 1.60e-3 x (T
DIE
- 30°C)
2
SM72480
www.ti.com SNIS156C –NOVEMBER 2010–REVISED APRIL 2013
Table 1. V
TEMP
Temperature Sensor Output Voltage vs Die Temperature Conversion Table
(1)
(continued)
V
TEMP
, Analog Output Voltage, mV
Die Temp.,
°C
T
TRIP
= 125 or 120°C T
TRIP
= 105°C
127 798 599
128 788 591
129 777 583
130 766 575
131 756 567
132 745 559
133 734 551
134 724 543
135 713 535
136 702 527
137 691 519
138 681 511
139 670 503
140 659 495
141 649 487
142 638 479
143 627 471
144 616 463
145 606 455
146 595 447
147 584 438
148 573 430
149 562 422
150 552 414
V
TEMP
vs DIE TEMPERATURE APPROXIMATIONS
The SM72480's V
TEMP
analog temperature output is very linear. The Conversion Table above and the equation in
The Second-Order Equation (Parabolic) represent the most accurate typical performance of the V
TEMP
voltage
output vs Temperature.
The Second-Order Equation (Parabolic)
The data from the Conversion Table, or the equation below, when plotted, has an umbrella-shaped parabolic
curve. V
TEMP
is in mV.
(1)
The First-Order Approximation (Linear)
For a quicker approximation, although less accurate than the second-order, over the full operating temperature
range the linear formula below can be used. Using this formula, with the constant and slope in the following set
of equations, the best-fit V
TEMP
vs Die Temperature performance can be calculated with an approximation error
less than 18 mV. V
TEMP
is in mV.
(2)
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