Datasheet

LMP91000
SNAS506H –JANUARY 2011–REVISED MARCH 2013 www.ti.com
Table 1. Temperature Sensor Transfer (continued)
-17 1695 46 1187
-16 1687 47 1179
-15 1679 48 1170
-14 1671 49 1162
-13 1663 50 1154
-12 1656 51 1146
-11 1648 52 1137
-10 1640 53 1129
-9 1632 54 1121
-8 1624 55 1112
-7 1616 56 1104
-6 1608 57 1096
-5 1600 58 1087
-4 1592 59 1079
-3 1584 60 1071
-2 1576 61 1063
-1 1568 62 1054
0 1560 63 1046
1 1552 64 1038
2 1544 65 1029
3 1536 66 1021
4 1528 67 1012
5 1520 68 1004
6 1512 69 996
7 1504 70 987
8 1496 71 979
9 1488 72 971
10 1480 73 962
11 1472 74 954
12 1464 75 945
13 1456 76 937
14 1448 77 929
15 1440 78 920
16 1432 79 912
17 1424 80 903
18 1415 81 895
19 1407 82 886
20 1399 83 878
21 1391 84 870
22 1383 85 861
Although the temperature sensor is very linear, its response does have a slight downward parabolic shape. This
shape is very accurately reflected in Table 1. For a linear approximation, a line can easily be calculated over the
desired temperature range from Table 1 using the two-point equation:
V-V
1
=((V
2
–V
1
)/(T
2
–T
1
))*(T-T
1
)
Where V is in mV, T is in °C, T
1
and V
1
are the coordinates of the lowest temperature, T
2
and V
2
are the
coordinates of the highest temperature.
For example, if we want to determine the equation of a line over a temperature range of 20°C to 50°C, we would
proceed as follows:
14 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated
Product Folder Links: LMP91000