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Application Note DS00004873A-page 1
AN4873
Measurement of Total Dissolved Solids in Water Using the
Integrated Operational Amplifier of PIC® Microcontrollers
Introduction
Author: Irene Abraham, Microchip Technology Inc.
Total Dissolved Solids (TDS) in water are described as the presence of inorganic salts and small amounts of organic
matter in water. TDS can be measured by determining the conductivity of water using a conductivity probe that can
detect the presence of ions in water. It is one of the most important factors that determines water quality. Ensuring
acceptable values of TDS in water is important for human health, food and food processing, fish farming and other
water-related industries. TDS measurement in water has applications in the medical, industrial, and residential fields.
This application note provides an overview of the concept and methods used for TDS measurement in water.
It also provides a working code example that demonstrates the measurement of conductivity and TDS in water
using a relaxation oscillator circuit designed with the Integrated Operational Amplifier (OPA) of the PIC16F17146
microcontroller.
The PIC16F17146 microcontroller family is equipped with advanced analog peripherals such as an OPA, 12-bit
differential Analog-to-Digital converter with computation (ADCC), 8-bit buffered Digital-to-Analog converter (DAC),
internal fixed voltage reference (FVR) along with core independent peripherals such as Capture Compare and PWM
(CCP), 16-bit and 8-bit Timers. This application note describes the usage of integrated OPA, ADCC and CCP
peripherals of the PIC16F17146 microcontroller family to measure TDS in water. The code example is available on
GitHub at the link below:
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | PIC16F17146 |
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