Melexis’ optical switch SensorEyeC, MLX75303, is the first member of the new SensorEyeC series of optical sensors specifically designed for high volume automotive, industrial and consumer applications. The name is derived from “sensor eye” as well as “sensor IC”.

It is an integrated sensor IC that packs a photodiode, transimpedance amplifier and the Schmitt trigger voltage output stage on a single chip. And guarantees stable light responsivity over time and over temperature, and also drastically improves noise behavior when compared to designs that use discrete photodiodes. In short, it simplifies application design, requires less external components and improves quality, said Melexis.

Crafted to overcome dirt build-up in light switching functions, the new sensor is designed to continue functioning at high speed (10μs typical/20μs max. response time) while being oversaturated by a strong light source up to 1000x the sensor’s switch-on threshold level, according to Melexis.

The MLX75303 can be used in applications with near infrared light or with ambient light where, for instance, day/night detection is required. Its unique features include:

• Dirt tolerance: The sensor is designed to maintain its speed, even after exposure to light 1000 times greater than its switching level. This is accomplished by using increased light levels, so that sufficient light penetrates even after dirt builds-up on the sensor
• Light responsivity that is relatively independent of temperature
• Small DFN open cavity package: 3 mm x 3 mm x 0.65 mm (also available in SO8 package)
• Very high positional accuracy; optical sensors must maintain alignment between the light source and the sensor. The small, symmetrical DFN package provides pin-to-photodiode accuracy better than ±85 µm. Additionally, the photodiode area is relatively large (600 μm x 600 μm) and thus tolerant to mechanical misalignment
• Extended operating temperature range of –40 °C to +125 °C that meets AEC-Q100 automotive specifications. A consumer version up to +85 °C is available also
• Solder reflow 260 °C compatible

The MLX75303 is available with lead time of 16 weeks ARO. And is priced below $0.50 USD in OEM quantities.

www.melexis.com

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