PRESTO - MLX90255 Page

MLX90255 5V, Linear Optical Array, 128 x 1 sensor-element organization, 385dpi sensor pitch, High linearity / uniformity for 256 gray-scale, High sensitivity, Special gain compensation for single LED, Output reference to ground, Low image lag, Up to 1MHz operation Optical Array IC

DATA-0234
Product Datasheet for the Melexis MLX90255 Optical Array IC

Features

Linear Optical Array

128 x 1 sensor-element organization

385dpi sensor pitch

High linearity / uniformity for 256 gray-scale

High sensitivity

Special gain compensation for single LED

Output reference to ground

Low image lag

Up to 1MHz operation

The MLX90255 linear optoelectronic sensor array IC consists of a 128 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 200µm x 66 µm and operation is simplified by internal control logic that requires only a serial input signal and a clock.

The sensor consists of 128 photodiodes arranged in a linear array and light energy falling on a photodiode generates photocurrent, which is integrated by the active integration circuitry associated with that pixel. During the integration period, a sampling capacitor connects to the output of the integrator through an analogue switch.

The amount of charge accumulated at each pixel is directly proportional to the light intensity and the integration time. The output and reset of the integrators is controlled by a 132-bit shift register and reset logic.

An output cycle is initiated by clocking in a logic 1 on serial input, which causes all 132 sampling capacitors to be disconnected from their respective integrators and starts an integrator reset period.

Support documents for the MLX90255

Below is the support information available for the MLX90255 - select a link to download the relevant documentation.

APNO-0052 - Spectroscopy with Optical Linear Arrays
Application Note for Spectroscopy with Optical Linear Arrays using the Melexis MLX90255 Opto Sensor IC
Dated : 10 November 2005 ( Uploaded )
Relevant to : MLX90255

DATA-0234 - Product Datasheet
Product Datasheet for the Melexis MLX90255 Optical Array IC
Dated : 22 December 2005 ( Uploaded )
Relevant to : MLX90255