Sites:
Home > Technical Library > Sensors, Transducers and Detectors > Oscillator Circuits For RTD Temperature Sensors

Oscillator Circuits For RTD Temperature Sensors

From Microchip Technology, Inc.

This application note shows how to design a temperature sensor oscillator circuit using Microchip's low-cost MCP6001 operational amplifier (op amp) and the MCP6541 comparator. Oscillator circuits can be used to provide an accurate temperature measurement with a Resistive Temperature Detector (RTD) sensor. Oscillators provide a frequency output that is proportional to temperature and are easily integrated into a microcontroller system. RC oscillators offer several advantages in precision sensing applications. Oscillators do not require an Analog-to-Digital Converter (ADC). The accuracy of the frequency measurement is directly related to the quality of the microcontroller's clock signal and high-frequency oscillators are available with accuracies of better than 10 ppm.
Read the Whole Article
Product Announcements
Fox Electronics, Inc. - Compact 3.3-volt F32K 32.768 kHz Oscillator
Fox Electronics, a leading global supplier of frequency control solutions, recently released the new compact 3.3-volt F32K 32.768 kHz oscillator series as an expansion to its HCMOS oscillator... (read more)
Microchip Technology, Inc. - 8-bit MCUs: Configurable Logic in Tiny Packages
MCUs Feature Configurable Logic Cells, Complementary Waveform Generator and Numerically Controlled Oscillator; Enable New Applications for MCUs... (read more)
Fox Electronics, Inc. - Auto Grade XPRESSO Crystal Oscillator
Fox Electronics, Inc - The XPRESSO Crystal Oscillator is a breakthrough in configurable Frequency Control Solutions. XpressO utilizes a family of proprietary ASICs, designed and developed with a key... (read more)
Fox Electronics, Inc. - F100 Family of Fox Oscillators
Fox Electronics, a leading global supplier of frequency control solutions, now offers a new series of small footprint, low current consumption oscillators for small and portable devices. (read more)
Topics of Interest

This application note shows how to select a temperature sensor and conditioning circuit to maximize the measurement accuracy and simplify the interface to the microcontroller. Practical circuits and...

Operational amplifier (op amp) oscillators can be used to accurately measure resistive and capacitive sensors. Oscillator design can be simplified by using the procedure discussed in this application...

This chapter begins with an introduction to sinusoidal oscillators. Subsequently, we will discuss the RC phase-shift and LC oscillator families, and we will describe the Armstrong, Hartley, Colpitts,...

AN1154 Precision RTD Instrumentation for Temperature Sensing SOLUTION Author: Ezana Haile Microchip Technology Inc. This solution uses a common reference voltage to bias the RTD and the ADC which...

This chapter begins with an introduction to sinusoidal oscillators. Subsequently, we will discuss the RC phase-shift and LC oscillator families, and we will describe the Armstrong, Hartley, Colpitts,...