9

TMP63

www.ti.com

SNIS211A – OCTOBER 2019 – REVISED DECEMBER 2019

Product Folder Links: TMP63

Submit Documentation Feedback

Copyright © 2019, Texas Instruments Incorporated

7.3 TMP63 R-T table

The TMP63 R-T table must be re-calculated for any change in the bias voltage, bias resistor, or bias current. TI

provides a Thermistor Design Tool to calculate the R-T table. The system designer should always validate the

calculations provided.

7.4 Feature Description

7.4.1 Linear resistance curve

The TMP63 has good linear behavior across the whole temperature range as shown in Figure 3. This allows a

simpler resistance to temperature conversion method that reduces look up table memory requirements.

Additionally the linearization circuitry or midpoint calibration associated with traditional NTCs is not necessary

with TMP63.

Because the TMP63 is linear across the entire temperature range, this has an added benefit that the TMP63 will

also not lose sensitivity at higher operating temperatures.

7.4.2 Positive Temperature Coefficient (PTC)

The TMP63 has a positive temperature coefficient. As temperature increases the TMP63 resistance will increase

leading to a reduction in power consumption of the bias circuit. A negative coefficient system will have power

consumption increase with temperature as the resistance decreases.

The TMP63 will also benefit from the reduced power consumption of the bias circuit with less self-heating than a

typical NTC system.

7.5 Device Functional Modes

The device has one mode of operation that applies when operated within the Recommended Operating

Conditions.