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MAX30205 - medical digital temperature sensor

21.07.2017

The new MAX3025 digital sensor from Maxim Integrated measures human body temperature with an accuracy of 0,1°C over a temperature range of 37...39°C. The sensor will find application in medical devices, devices for sports and fitness.

A feature of the sensor is a 16-bit sigma-delta ADC, which allows you to register a temperature change of four thousandths of a degree.

The chip has an I2C interface with bus blocking protection. With address selection, up to 2 sensors can operate on a single I32C bus. In addition to direct temperature measurement, the MAX3025 contains a temperature comparator that signals on a separate line the fact that the temperature exceeds the set values.

The output of the built-in comparator is implemented as an open drain; it can also operate in the interrupt signal generation mode. In this case, the output value is fixed before the read operation of any register is performed on the I2C bus. The MAX30205 operates from 2,7V to 3,6V with a peak current draw of less than 600µA.

You can use the MAX30205EVSYS# demo kit to get familiar with the capabilities of the new sensor. It allows you to display the temperature value on the PC. The MAX30205 evaluation GUI software is used to display all sensor parameters.

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