MLX75031 Datasheet, PDF (2/67 Pages) Melexis Microelectronic Systems – Optical Gesture & Proximity Sensing IC

MLX75031
Optical Gesture & Proximity Sensing IC
with Integrated LED Drivers
Datasheet
Table of Contents
Features & Benefits.................................................................................................................................... 1
Applications ...............................................................................................................................................1
Functional Diagram.................................................................................................................................... 1
Ordering Information................................................................................................................................. 1
General Description ................................................................................................................................... 1
Table of Contents....................................................................................................................................... 2
1. Functional Block Diagram.......................................................................................................................4
2. Device Overview .................................................................................................................................... 4
3. Glossary of Terms................................................................................................................................... 5
4. Absolute Maximum Ratings....................................................................................................................6
5. Pin Definitions & Descriptions................................................................................................................7
6. General Electrical Specifications............................................................................................................. 9
7. Sensor Interface Specific Specifications................................................................................................10
8. Detailed General Description ...............................................................................................................15
8.1 Active Light Channels A & B......................................................................................................................................................15
8.1.1 Transimpedance Amplifier (TIA) ................................................................................................ 15
8.1.2 Active Light Channel DC Light Measurement....................................................................... 16
8.2 Ambient Light Sensor ................................................................................................................... 17
8.2.1 Normal Operation.................................................................................................................. 17
8.2.2 Logarithmic Transfer Function .............................................................................................. 17
8.2.3 Calibration & Temperaure Compensaion............................................................................. 18
8.2.4 Response Time ....................................................................................................................... 19
8.2.5 Diagnostics Mode Operation ................................................................................................ 20
8.3 Temperature Sensor .................................................................................................................... 21
8.4 Analog to Digital Conversion........................................................................................................ 22
8.5 Output Stage................................................................................................................................. 22
8.5.1 DAC ......................................................................................................................................... 22
8.5.2 LED Driver............................................................................................................................... 23
8.5.3 LED Forward Voltage Measurement..................................................................................... 23
8.5.4 Battery Supply Voltage Measurement & Monitoring .......................................................... 24
8.6 Power-On Reset............................................................................................................................ 25
8.7 Oscillator (RC) ............................................................................................................................... 25
8.8 ADC MUX ...................................................................................................................................... 25
8.9 Vstab Analog +Bandgap ............................................................................................................... 26
8.10 Digital Control............................................................................................................................. 26
8.11 SPI................................................................................................................................................ 26
REVISION 001 – JANUARY, 2013
39010xxxxx
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