Integrated light-to-voltage sensor

June 19th, 2008 • Related • Filed Under

Melexis adds light-to-voltage sensor to the SensorEyeCTM series. Melexis announces the launch of the MLX75305 Light-to-Voltage SensorEyeCTM. This is the second member of the SensorEyeCTM series of optical sensors specifically designed for high volume automotive, industrial and consumer applications. The MLX75305 Light-to-Voltage SensorEyeC is an easy-to-use light sensor that converts light intensity into an output voltage. The sensor is designed for high-volume applications like ambient light detection, LCD backlight dimming and LED light control. The light sensor’s output gives a voltage that varies linearly with incident light.

This MLX75305 is an integrated sensor IC, which means that the photodiode, transimpedance amplifier and linear voltage output stage are all included in the sensor chip. This guarantees stable light responsivity over time and over temperature, and also drastically improves noise behavior when compared to designs that use discrete photodiodes. It simplifies application design, requires fewer external components and improves quality. The SensorEyeC series are perfect replacements for discrete photodiodes, phototransistors and light dependant resistors (LDR). SensorEyeC devices are integrated light sensors with photodiode, transimpedance amplifier and output transistor in one chip to simplify application design, enhance quality and minimize use of external components.

All sensors are RoHS compliant and suited for solder reflow 260°C. AEC-Q100 qualified versions for automotive applications up to +125°C operating temperature are available. The MLX75305 is suited for measuring ambient light or for controlling LED light in LCD backlight dimming applications. Its unique features include small DFN open cavity package: 3mm x 3mm x 0.65mm; lead free solder reflow compatible for 260°C peak process temperatures; highly linear voltage output; light responsivity that is relatively independent of temperature; very high positional accuracy: the small, symmetrical DFN package provides pin-to-photodiode accuracy better than ±85µm; 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.

The MLX75305 Light-to-Voltage sensor is perfectly fit for a number of applications including LED monitoring and control of light intensity & colour; LCD backlight dimming of television sets, notebook computers, mobile phones (GSM), GPS receivers and portable multimedia players (MP3, DVD); hand presence detection, for instance for automatic activation of water taps and hand dryers; automotive applications include automatic light dimming of instrument panels and displays, headlights on/off control and hand presence detection for opening doors.

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There Are 4 Responses So Far. »

  1. Comment by Darrin Arthur on 12 August 2008:

    I’m looking for a light or voltage sensor that I can install in our signs that can determine when our signs need to be serviced without the customer having to call us. Ideally it will need to work with flourescents, neon and LED illumination.

    are you able to help me source a product that would work for this application.

    Darrin Arthur
    Project Manager
    Knight Signs

  2. Comment by Cliff De Locht on 4 September 2008:

    I suggest to take a look at the MLX75304 light-to-frequency SensorEyeC that features >100db dynamic rate and high precision.

  3. Comment by ravindra on 21 January 2009:

    dear sir
    as we are one of the machine manufacturers for agricultural application and we need sensors to convert light to voltage

    and as we have already tried some methods so kindly give us your detailed technical data to make suite

  4. Comment by Priyanka on 20 February 2010:

    I’m a student, looking for a photo-transistor for our project which is basically a AUTOMATIC ROOM LIGHT INTENSITY DETECTION AND CONTROL USING A MICROPROCESSOR AND LIGHT SENSORS and so we were looking for a sensor which will convert light into voltage.

    It’ll be very helpful if you can provide us with the details of this component and lets us know the detail how to order the same.

    Regards
    Priyanka Bhan

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