September 2007

Rev 3

1/9

AN2278

Application note

Temperature sensor application

using ST LM135

Introduction

This application note describes how to develop a temperature sensor application using the

ST LM135 temperature sensor. Application development was done on a Raisonance REva

board. The Raisonance REva board is a universal board with several useful features for

application development. It has been designed for quick and easy evaluation of a wide range

of microcontrollers. This application uses the ST72325 microcontroller, which is interfaced to

REva using a daughter board.

The main components required for the development of this application are:

Some of the useful features of the REva board are:

external analog connector, temperature sensor and potentiometer

1.8 V, 3.3 V, 5 V microcontrollers

Section 1 highlights the important features of the LM135 sensor and explains the

temperature calculation used in the application. Section 2 explains the temperature sensor

management and Section 3 focusses on explaining the application flow. Section 4 gives an

overview of the hardware setup required to implement the application.

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