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MLX75306 General Description

Near InfraRed (NIR) spectroscopy is the driving technology inside the 3rd generation of Optical Linear Array, the MLX75306. The sensor enables real-time fuel quality sensing for engine management. A cost effective and robust NIR fuel quality sensor consists of an LED light, optical filters and the MLX75306. Measurement of fuel type, mixtures and contaminants provides engine control systems an important new input for optimizing efficiency and emissions.

Specifications

The MLX75306 linear sensor array consists of a 142 x 1 array of photodiodes, associated charge amplifier circuitry and a pixel data-hold function that provides simultaneous integration start and stop times for all pixels. The pixels measure 100µm (H) by 47µm (W) with a 50µm pixel-to-pixel pitch. Operation is simplified due to internal control logic that only requires the upload of commands via the SPI interface.

Optical Linear Array

Light energy falling on a photodiode generates photocurrent, which is integrated by the active integration circuitry associated with each pixel. During the integration period, a sampling capacitor connects to the output of the integrator through an analog switch. The amount of charge accumulated at each pixel is directly proportional to the light intensity and the integration time.
During the read-back period, the charge stored on the sampling capacitors is sequentially connected to a charge-coupled output amplifier that generates a voltage. That voltage is converted to a digital value which results in a digital output stream representing the light intensity. The digital output stream has some additional control bytes, integrity checks and also a temperature byte.

MLX75306 Features and Benefits

142 customer pixels, 100µm height, 50µm pitch. Total array length: 7.1mm
Flat pixel response under uniform light
SPI control: MOSI/MISO/CS/SCLK
Internal ADC with selectable 8 bit and 4bit high speed readout
2 bit output (1.5 bit content) based on two programmable 4-bit thresholds
1 bit output based on programmable 4-bit threshold
Read-out speed up to 12MHz
SPI based easy programmable upload & download features: readout direction, selectable region of interest, multiple automotive test modes, integrity checks
16 bit Integration Time in two ranges: 10µs .. 94.4ms range possible
Integrated Temperature Sensor
Max. +/- 12% Pixel to Pixel Difference (Note that 4 bit gives a 6.25% step)
3.3V operation
Package: SO16 narrow body cavity package technology
Devices available for both automotive and consumer markets

Melexis Products

Melexis Members

Download Melexis
Annual Report 2011
English | Nederlands

MLX75306 Linear Optical Array

Download MLX75306 Datasheet (PDF)

MLX75306 General Description

Specifications

Optical Linear Array

MLX75306 Features and Benefits

MLX75306 Applications

MLX75306 Documentation

MLX75306 Tools

MLX75306 Environmental Information

MLX75306 In The Press

Related Melexis News

MLX75306 Frequently asked Questions

Buy MLX75306

Melexis Products

Melexis Members

Download Melexis Annual Report 2011 English | Nederlands

MLX75306 Linear Optical Array

Download MLX75306 Datasheet (PDF)

MLX75306 General Description

Specifications

Optical Linear Array

MLX75306 Features and Benefits

MLX75306 Applications

MLX75306 Documentation

MLX75306 Tools

MLX75306 Environmental Information

MLX75306 In The Press

Related Melexis News

MLX75306 Frequently asked Questions

Buy MLX75306

Download Melexis
Annual Report 2011
English | Nederlands