GND

Thermal Diodes

8

TMP235-Q1, TMP236-Q1

SBOS939 – APRIL 2019

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7 Detailed Description

7.1 Overview

The TMP23x-Q1 devices are a family of linear analog temperature sensors with an output voltage proportional to

temperature. These temperature sensors have an accuracy from 0°C to 70°C of ±1.5°C. The TMP235-Q1 device

provides a positive slope output of 10 mV/°C over the full –40°C to +150°C temperature range and a supply

range from 2.3 V to 5.5 V. The higher gain TMP236-Q1 sensor provides a positive slope output of 19.5 mV/°C

from –10°C to +125°C and a supply range from 3.1 V to 5.5 V. A class-AB output driver provides a maximum

output of 500 µA to drive capacitive loads up to 1000 pF.

7.2 Functional Block Diagram

7.3 Feature Description

temperatures above 100°C. When small shifts are expected, a piecewise linear function provides the best

accuracy and is used for the device accuracy specifications (see Specifications). Typical output voltages of the

TMP23x-Q1 devices across the full operating temperature range are listed in Table 3 and Table 4. The ideal

linear columns indicate the small voltage shift at elevated temperatures.

The piecewise linear function uses three temperature ranges listed in Table 1 and Table 2. In equation form, the

where

•

•

•

•

•

(1)

calculated in Equation 2. For applications where the accuracy enhancement above 100°C is not required, use the

first row of Table 1 and Table 2 for all voltages.

(2)

Table 1. TMP235-Q1 Piecewise Linear Function Summary

(°C)

–40 to +100

< 1500

0

10

500

100 to 125

1500 to 1752.5

100

10.1

1500

125 to 150

> 1752.5

125

10.6

1752.5