Temperature sensing with PTC thermistor circuit
CIRCUIT060003
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Description & Features

Technical documentation

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Key Document

Description

This temperature sensing circuit uses a resistor in series with a positive–temperature–coefficient (PTC) thermistor to form a voltage–divider, which has the effect of producing an output voltage that is linear over temperature. The circuit uses an op amp in a non–inverting configuration with inverting reference to offset and amplify the signal, which helps to utilize the full ADC resolution and increase measurement accuracy.

Features
  • Senses Temperature between 0°C - 50°C 
  • Output: 0.05V - 3.25V 
  • Single 3.3V Supply with half-supply reference

Technical documentation
Application notes (5)
Title Type Size (KB) Date
PDF 444 06 Mar 2020
PDF 440 24 Oct 2019
PDF 351 23 May 2019
PDF 1620 28 Jan 2019
PDF 286 13 Dec 2018
User guides (1)
Title Type Size (KB) Date
PDF 667 15 Dec 2015
White papers (1)
Title Type Size (KB) Date
PDF 11294 18 Feb 2019

Design tools & simulation (2)

Name Part Number Tool Type
Analog engineer's calculator  ANALOG-ENGINEER-CALC  Calculation tools 
SPICE-based analog simulation program  TINA-TI  Simulation tools 

TI Devices (7)

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MSP430FR2311  16MHz integrated analog microcontroller with 3.75KB FRAM, Op-Amp, TIA, Comparator w/ DAC, 10-bit ADC  Microcontrollers (MCU) 
MSP430FR2353  24MHz 105C integrated analog microcontroller with 16KB FRAM, Op-Amps/PGAs, 12-bit DACs, 12-bit ADC  Microcontrollers (MCU) 
MSP430FR2355  24MHz 105C integrated analog microcontroller with 32KB FRAM, Op-Amps/PGAs, 12-bit DACs, 12-bit ADC  Microcontrollers (MCU) 
OPA375  OPAx375, 500uV, 10-MHz, Low Broadband Noise, RRO, Operational Amplifier  Operational amplifiers (op amps) 
TLV9061  Industry's smallest 10MHz, RRIO, 1.8V-5.5V operational amplifier  Operational amplifiers (op amps) 

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