- This design can be utilised in factory automation solutions
- It can be implemented for the development of a low cost, low power temperature sensing system
The temperature has always been an important parameter in the electronics industry. It is measured and controlled by a combination of a sensor and algorithms. These sensors and algorithms vary from device to device providing accurate temperature measurements.
With the advent of Industry 4.0, the need for precise temperature measurement has increased. There is an increase in thermal-based protection circuits which are integrated with the industrial appliances. This ensures safety against unwanted current and voltage spikes responsible for thermal losses.
This reference design is based on the development of a low cost, low power temperature sensing system which can be deployed in industrial applications.
The design consists of a low power microcontroller, an I/O interface and a wide range temperature sensor. These three component constitutes a feasible temperature sensing system.
Integrated into a 2.5mm x 2.5mm size
The PCB is designed in a compact size of 2.5 mm x 2.5 mm. The operating voltage range varies from 24 Volts to 60 Volts which provides easy integration with industrial controllers. The design features a reverse polarity protection circuit.
This temperature sensing circuit has a marginal error of ± 1° Celcius. It can operate for temperatures ranging between -40°C to +145°C. Due to the wide temperature range, this reference design meets IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT) requirements for Industry 4.0.
Consumes less than six milliamperes in Standby Mode
The designed circuit requires less than six milliamperes to actively run on low power consumption mode. The design supports SPI, UART and I2C communication protocol. It provides an easy interface with the I/O signal processors.
The design is suitable for several applications including automobile, defence, surveillance and manufacturing sectors.
The design has been released and developed by Maxim Integrated. The design includes all the necessary documents for open-source prototyping of the circuit. All the technical documents can be downloaded here.