MLX90320
Automotive sensor interface
Table of Contents
1 Functional diagram ...........................................................................................2
2 General description...........................................................................................2
3 Maximum ratings ..............................................................................................4
4 Pad definitions and descriptions .......................................................................5
5 MLX90320 General Specifications....................................................................6
6 Detailed Description........................................................................................10
6.1 EEPROM ..................................................................................................11
6.2 The programmable clock...........................................................................11
6.3 The temperature chain. .............................................................................12
6.4 The sensor signal chain. ...........................................................................13
6.4.1 The Gain calibration of the sensor signal chain....................................14
6.4.2 The Offset calibration of the sensor signal chain..................................15
6.4.3 The output clamping levels ..................................................................17
6.4.4 The Faults detection ............................................................................17
6.5 Programming the MLX90320 through the output pin.................................19
6.5.1 Overview..............................................................................................19
6.5.2 Communication Initialization Request..................................................19
6.5.3 Communication Request......................................................................20
6.5.4 Bit format .............................................................................................20
6.5.5 Commands ..........................................................................................21
7 Unique Features.............................................................................................23
8 Typical applications circuits ............................................................................24
8.1 Ratio-metric mode with use of external temperature sensor......................24
8.2 Ratio-metric mode without use of external temperature sensor.................25
8.3 Non Ratio-metric mode with use of external temperature sensor. .............25
8.4 Non Ratio-metric mode without use of external temperature sensor. ........26
9 EEPROM Contents.........................................................................................26
10 Standard information regarding manufacturability of Melexis products with
different soldering processes.............................................................................30
11 Package Information.....................................................................................31
12 Disclaimer.....................................................................................................33
3901090320
Rev 007
Page 3 of 33
Data Sheet
Feb/12
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