MLX75031 Datasheet, PDF (1/67 Pages) Melexis Microelectronic Systems – Optical Gesture & Proximity Sensing IC

Features & Benefits
Applications
Two independent Active Light measurement
channels for proximity sensing and/or gesture
recognition
Integrated DC light cancellation circuitry
Two logarithmic ambient light channels with
two different sensitivities
Minimum amount of external components
Stand-by and sleep modes for low power
consumption
Integrated LED drivers
Integrated battery voltage monitor
Integrated LED temperature sensing circuitry
Integrated 16bit ADC for high resolution A2D
conversion
Integrated temperature sensor
Integrated watchdog timer
Easy digital communication interface via SPI
High input capacitance tolerant input current
terminals
High safety design by several diagnostic and
monitoring functions
Ordering Information
Robust Proximity Sensing
Smart Touch Displays & Panels
Simple Gesture Detection
Driver-Passenger Discrimination
Ambient Light Sensing & Display Dimming
Functional Diagram
Product Code
MLX75031
MLX75031
Temperature Code
R (-40°C to 105°C)
C (0°C to 70°C)
Package Code
LQ (QFN24 4x4)
LQ (QFN24 4x4)
Option Code
B
B
General Description
The MLX75031 Optical Gesture & Proximity Sensing IC actively controls up to 2 independent Active Light
measurement channels. Each channel consists out of one or multiple LEDs, of any type, combined with
one or more photodiodes, of any type. Additional Active Light channels can be added through
multiplexing. Integrated DC light suppression makes the sensors highly tolerant to background light
interference. Primary function is complemented with two integrated ambient light channels. Internal
control logic, configurable user registers and SPI communication enable intuitive & programmable
operation. Extra features include a watchdog timer, on-board temperature sensor and self-diagnostics are
built-in to facilitate robust product design.
The digital output from the Active Light and ambient light channels can be used for proximity and ambient
light detection. Gestures such as swipe, zoom, scroll can be recognized by software algorithms that can
run on the customer’s microcontroller. Reliable communication is assured via an SPI interface.