Vishay’s New Ambient Light Sensor Matches Spectral Sensitivity of Human Eye

By WPG AmericasMay 26, 2016

Earlier this year, the optoelectronics group of Vishay Intertechnology announced its new high-accuracy digital ambient light sensors built for automated lighting controls in LCD displays, not only to turn on or off lights but also to control their intensity.

The new ambient light sensors, perceive light or brightness much like the human eye. By automatically adjusting its features, the sensors, designed to adjust instinctively to the changing ambient light conditions, saves power by completely eliminating the need for manual adjustments.

Vishay’s Ambient Light Sensors Accommodate Designer Flexibility for a Wide Range of Applications

Vishay’s latest ambient light sensor, VEML6030, released on Feb 11, 2016, is specifically modeled for electronic applications like backlight dimming and optical switching in LCD displays. The compact, side- or top-view sensor allows designers the ultimate flexibility so they are able to save space in electronic devices like compact televisions, CCTV cameras, smartphones, ATM machines, thermostats, clocks, PDAs, GPS units, or any LCD display. Offering optimum brightness to indicator lights behind switches, one of its key application areas also include industrial and medical sensing.

As part of smart home lighting control systems, the ambient light sensors provides exact and current analysis of ambient lighting that allows for precise control even during unexpected situations, like fast-moving storm. Plus, the device detects fading natural light and can detect the sun rising in the morning to control light levels and can also be used to control window blinds and shading.

The side-view package of the device, when combined with Vishay IR receivers such as the TSOP772, offers the same dimensions and optical axis height, which exceptionally simplifies window designs.

Filtron™ Technology and O-Trim™ Technology Adopted by Vishay Offers Exceptional Spectral Sensitivity and Output Tolerance

The Vishay Semiconductors VEML6030, adopts Filtron™ technology and supports an I²C bus interface for simple operation. Combining a photo-diode, low-noise amplifier, and 16-bit ADC in a miniature, the VEML6030 comes in a transparent surface-mount package measuring only 2 mm by 2 mm by 0.85 mm. The Filtron™ technology, incorporated by Vishay, in its recently introduced ambient light sensors, facilitates ambient light spectral sensitivity close to that of the human eye, while the sensor’s adoption of O-Trim™ technology supports an output tolerance of ≤ 10 %.

Vishay Semiconductors VEML6030 Allows Development of Applications with Low-Transmittance (Dark) Lens Designs

The new ambient light sensors from Vishay, offers 100 Hz and 120 Hz flicker noise rejection and outstanding temperature compensation from -25 °C to +85 °C. Incredibly power efficient, the device brings power consumption down to just 2 μA in operating mode and 0.5 μA in shutdown mode. With detection from 0 lx to 167 klx and resolution down to 0.005 lux per count, it also allows offers an excellent platform for working on applications with low-transmittance (dark) lens designs.

Key Specifications of Vishay Semiconductors VEML6030 -

  • Vishay’s patented Filtron™ technology allows ambient light spectral sensitivity from 400 nm to 680 nm bringing it close to that of the human eye
  • O-Trim™ technology permits output tolerance of ≤ 10 %
  • Resolution down to 0.005 lux per count allows for operation in applications with low-transmittance (dark) lens designs
  • Spectral sensitivity Operates over a temperature range of -25 °C to +85 °C, which makes it useful for devices that require display and keypad dimming adjustment and optical switching.
  • Miniature 2mm x 2mm package

The supply voltage of Vishay Semiconductors VEML6030, ranges from 2.5 V to 3.6 V, while its I²C bus voltage range is placed between 1.7 V and 3.6 V. Packed in a lead (Pb)-free 6-pin molded package, the device is RoHS-compliant, halogen-free, and Vishay Green.

Designed for display and keypad dimming adjustment in notebooks, computers, LCD TVs, digital cameras, and mobile devices such as smartphones and GPS units, the Vishay Semiconductors new ambient light sensor VEML6030, is now available in market with lead times of eight to twelve weeks for bulk orders.