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TMP63-Q1

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SNIS215 – JANUARY 2020

Product Folder Links: TMP63-Q1

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7.3 TMP63-Q1 R-T table

The TMP63-Q1 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 must always validate the

calculations provided.

7.4 Feature Description

7.4.1 Linear Resistance Curve

The TMP63-Q1 has good linear behavior across the whole temperature range as shown in Figure 3. This range

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

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

device .

The linear resistance across the entire temperature range allows the device to maintain sensitivity at higher

operating temperatures.

7.4.2 Positive Temperature Coefficient (PTC)

The TMP63-Q1 has a positive temperature coefficient. As temperature increases the device resistance increases

leading to a reduction in power consumption of the bias circuit. In comparison, a negative coefficient system

increases power consumption with temperature as the resistance decreases.

The TMP63-Q1 benefits 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 operates in only one mode when operated within the Recommended Operating Conditions.