MLX90320 Datasheet, PDF (2/32 Pages) Melexis Microelectronic Systems – Automotive small sensor interface

MLX90320
Automotive small sensor interface
Table of Contents
1 Functional diagram ................................................................................................................ 1
2 General description................................................................................................................ 1
3 Maximum ratings.................................................................................................................... 3
4 Pad definitions and descriptions ............................................................................................ 4
5 MLX90320 General Specifications......................................................................................... 5
6 Detailed Description............................................................................................................... 9
6.1 EEPROM .......................................................................................................................... 10
6.2 The programmable clock. ................................................................................................. 10
6.3 The temperature chain...................................................................................................... 11
6.4 The sensor signal chain. ................................................................................................... 12
6.4.1 The Gain calibration of the sensor signal chain. ............................................................ 13
6.4.2 The Offset calibration of the sensor signal chain. .......................................................... 14
6.4.3 The output clamping levels ............................................................................................ 15
6.4.4 The Faults detection ...................................................................................................... 16
6.5 Programming the MLX90320 through the output pin ........................................................ 18
6.5.1 Overview........................................................................................................................ 18
6.5.2 Communication Request................................................................................................ 18
6.5.3 Bit format ....................................................................................................................... 19
6.5.4 Commands .................................................................................................................... 20
7 Unique Features .................................................................................................................. 22
8 Typical applications circuits ................................................................................................. 23
8.1 Ratio-metric mode with use of external temperature sensor............................................. 23
8.2 Ratio-metric mode without use of external temperature sensor........................................ 24
8.3 Non Ratio-metric mode with use of external temperature sensor. .................................... 24
8.4 Non Ratio-metric mode without use of external temperature sensor. ............................... 25
9 EEPROM Contents .............................................................................................................. 25
10 Reliability Information......................................................................................................... 29
11 ESD Precautions................................................................................................................ 29
12 Package Information .......................................................................................................... 30
13 Disclaimer .......................................................................................................................... 32
3901090320
Rev 004
Page 2 of 32
Data Sheet
Mar/05