Single-chip light sensing unlocks size, cost and design savings

The Melexis SensorEyeC family replaces discrete devices such as photodiodes, phototransistors and Light-Dependent Resistors (LDR) with a single chip to simplify application design, enhance quality and minimise use of external components.

Each of the four SensorEyeC devices integrates a photodiode, transimpedance amplifier and output transistor in a 3mm x 3mm x 0.65mm DFN package. This increased integration is achieved using a patented package technology that combines high robustness with an undisturbed optical path.

Among the devices available, the MLX75303 is an optical switch featuring a Schmitt-trigger output and featuring a high light-saturation robustness factor to overcome contamination by dirt. The MLX75304 is a light-to-frequency converter that achieves linear response over a dynamic light-input range of more than 100dB. The third device, the MLX75305, is a light-tovoltage converter. Melexis has also recently added the MLX75309, which combines approximate human-eye response and low power consumption to control LCD brightness and keypad backlighting in battery-powered devices.

A SensorEyeC evaluation board is available, which contains the MLX75303, MLX75304 and MLX75305 and attaches directly to a PC via a USB connection. The graphical development software provided enables rapid configuration and system design.

 

FEATURES Supply-voltage range: 3V to 5.5V Low temperature dependency Standard and extended temperature ranges: -20°C to 85°C -40°C to 125°C AEC-Q100 automotive-qualified versions available

APPLICATIONS Contactless switching Lighting controllers Instrumentation Printers and copiers Near-infrared range detection Proximity sensing

 

The SensorEyeC board is available to members of the Future Board Club. To apply for the development board, and membership of the Board Club, go to www.my-boardclub.com/manf-offers.htm This offer is free and subject to qualification.

 

Melexis / MLX7530x