CIRCUIT060002
Temperature sensing with NTC thermistor circuit
CIRCUIT060002
Overview
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
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| Type | Title | Date | ||
|---|---|---|---|---|
| Circuit design | Temperature Sensing NTC Circuit With MSP430 Smart Analog Combo (Rev. D) | PDF | HTML | Sep 26, 2024 | |
| E-book | Analog Engineer’s Circuit Cookbook: Amplifiers (Rev. D) | PDF | HTML | Sep 24, 2024 | |
| Circuit design | Temperature sensing with NTC circuit (Rev. A) | PDF | HTML | Jun 3, 2021 | |
| Application note | How to Use the Smart Analog Combo in MSP430™ MCUs (Rev. A) | PDF | HTML | Oct 24, 2019 | |
| Circuit design | Monitoring NTC Thermistor Circuit With Single-Ended ADC (Rev. A) | PDF | HTML | Jun 27, 2019 | |
| Application brief | How to monitor board temperature | Jan 28, 2019 | ||
| Application note | Methods to Reduce Thermistor Linearization Error, Memory, and Power Requirements | Dec 13, 2018 | ||
| User guide | Single-Supply Thermocouple with RTD Base Cold-Junction Compensation Design Guide | Jul 8, 2016 |