Application Notes

ManualsBrandsMelexis ManualsOptical Sensors - IR, PIR, PhotoMLX90614ESF-AAA Infrared Temperature Sensor

Application Note: MLX90614ESF

SMBus Communication with

Orangutan Robot Controllers

1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2. Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3. Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Application Note: MLX90614ESF SMBus Communication with Orangutan Robot

Controllers

Corporation

Page 1 of 5

Summary of content (5 pages)

PAGE 1
Application Note: MLX90614ESF SMBus Communication with Orangutan Robot Controllers © 2001–2010 Pololu Corporation Application Note: MLX90614ESF SMBus Communication with Orangutan Robot Controllers 1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Software . . . . . . . . . . . . . . . . . .
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Application Note: MLX90614ESF SMBus Communication with Orangutan Robot Controllers © 2001–2010 Pololu Corporation 1. Overview The MLX90614ESF temperature sensor [http://www.pololu.com/catalog/product/1061] is a high-accuracy, high-resolution, noncontact thermometer with a 90-degree field of view. It has a measurement resolution of 0.02°C and is factory calibrated for a wide -70 to 380°C object temperature range.
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Application Note: MLX90614ESF SMBus Communication with Orangutan Robot Controllers © 2001–2010 Pololu Corporation 2. Construction The following diagram, taken from page 6 of the MLX90614ESF datasheet [http://www.pololu.com/file/download/ MLX90614.pdf?file_id=0J170] (749k pdf), shows the MLX90614ESF pinout as seen when looking at the top of the sensor. • VSS: Ground. The metal can is also connected to this pin. • SCL / Vz: Serial clock input for 2 wire communications protocol. 5.
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Application Note: MLX90614ESF SMBus Communication with Orangutan Robot Controllers © 2001–2010 Pololu Corporation 3. Software This sample program reads the temperature from the MLX90614ESF’s RAM using SMBus. The program works with our Orangutan robot controllers [http://www.pololu.com/catalog/category/8] (except for the Orangutan X2) and uses the Pololu AVR C/C++ Library [http://www.pololu.com/docs/0J20] to print the measured temperature to the LCD.
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Application Note: MLX90614ESF SMBus Communication with Orangutan Robot Controllers © 2001–2010 Pololu Corporation // 100 Tk = To × 2 (from the datasheet section 8.7.2--To has the units 0.02K) // Tf = Tk × 9/5 - 459.67 (conversion from Kelvin to Farenheit) } // 100 // 100 // 100 return × Tf = 100 × Tk × 9/5 × Tf = To × 2 × 9/5 × Tf = To × 18/5 (256*high_byte+low_byte) 45967 45967 45967 * 18/5 - 45967; // return temperature in units of 0.