Temperature sensing with NTC thermistor circuit
CIRCUIT060002
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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 negative–temperature–coefficient (NTC) 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 gain the signal, which helps to utilize the full ADC resolution and increase measurement accuracy.

Features
  • Senses Temperature between 25°C - 50°C 
  • Output: 0.05V - 3.25V 
  • Single 3.3V Supply with half-supply reference

Technical documentation
Application note (6)
Title Type Size (KB) Date
PDF 478 09 Mar 2020
PDF 440 24 Oct 2019
PDF 263 12 Mar 2019
PDF 1620 28 Jan 2019
PDF 297 30 Dec 2018
PDF 286 13 Dec 2018
User guide (1)
Title Type Size (KB) Date
PDF 23214 08 Jul 2016
E-book (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 tool 
SPICE-based analog simulation program  TINA-TI  Simulation tool 

TI Devices (6)

Part Number Name Product Family
MSP430FR2310  16MHz integrated analog microcontroller with 2KB FRAM, Op-Amp, TIA, Comparator w/ DAC, 10-bit ADC  Microcontrollers (MCU) 
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) 
OPA333  1.8-V, 17-µA, microPower, precision, zero-drift CMOS op amp  Operational amplifiers (op amps) 
TLV9002  2-Channel, 1MHz, RRIO, 1.8V to 5.5V Operational Amplifier for Cost-Optimized Systems  Operational amplifiers (op amps) 

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