TMP112 datasheet(29/46 Pages) TI2

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8 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

8.1 Application Information

8.1.1 Calibrating for Improved Accuracy (TMP112-Q1 Only)

Many temperature monitoring applications require better than 0.5°C accuracy over a limited temperature range.

Knowing the offset of a temperature sensor at a given temperature in conjunction with the average temperature

span (slope) error over a fixed range makes achieving this improved accuracy possible.

The TMP112-Q1 device has three distinct slope regions that conservatively approximate the inherent curvature.

The following lists the three distinct slope regions:

1. Slope1 applies over –40°C to 25°C

2. Slope2 applies over 25°C to 85°C

3. Slope3 applies over 85°C to 125°C

The Section 6.6 table defines these slopes which are also shown in Figure 8-1.

Note

Each slope listed in the Section 6.6 table is increasing with respect to 25°C.

0.8

0.6

0.4

0.2

0.4

0.6

Temperature( C)

-40

-20

130

Slope1

MAX

Slope1

MIN

Slope2

MAX

Slope2

MIN

Slope3

MIN

100 110 120

80 90

-30

-10

Slope3

MAX

Figure 8-1. Accuracy and Slope Curves Versus Temperature

Use Equation 1 to calculate the worst-case accuracy at a specific temperature.

Accuracy

=Acc

+ T

Slope

D ´

(worst-case)

25°C)

uracy

(

(1)

www.ti.com

TMP112-Q1, TMP112D-Q1

SLOS887G – SEPTEMBER 2014 – REVISED MAY 2025

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