Electrical Sensors / Detectors / Transducers
Digital Ambient Light Sensor conserves space in TVs, handhelds.
Press Release Summary:
Designed for flat-panel TVs and handheld devices, VEML7700 is used for backlight dimming and optical switching as well as powering systems on/off. Filtron™ technology ambient light spectral sensitivity mimics that of human eyes, while O-Trim™ technology provides output tolerance of ≤10%. Combining photo-diode, low-noise amplifier, and 16-bit ADC in 6.8 x 3.0 x 2.35 mm, transparent, SMT package, sensor supports I²C bus interface and offers mounting flexibility as side- or top-view device.
Original Press Release:
New Vishay Intertechnology Ambient Light Sensor Saves Space and Simplifies Window Designs in Flat-Panel TVs and Consumer Handheld Devices
High-Accuracy Digital Device Features Filtron™ Technology in Miniature 6.8 mm by 3.0 mm by 2.35 mm Side-View Package
MALVERN, Pa. – The Optoelectronics group of Vishay Intertechnology, Inc. (NYSE: VSH) today introduced a new high-accuracy digital ambient light sensor for flat-panel televisions and consumer handheld devices. The Vishay Semiconductors VEML7700 combines a photo-diode, low-noise amplifier, and 16-bit ADC in a miniature, transparent surface-mount package measuring 6.8 mm by 3.0 mm by 2.35 mm. The sensor adopts Filtron™ technology and supports an I²C bus interface for simple operation.
The device released today is used for backlight dimming and optical switching for consumer products, in addition to power on / off for industrial lighting systems. With its compact size and mounting flexibility as a side- or top-view device, the sensor allows designers to save space in compact televisions, CCTV cameras, smartphones, PDAs, and GPS units, while providing flexibility in where and how they place the device. When used in conjunction with Vishay IR receivers such as the TSOP772, the VEML7700's side-view package offering the same dimensions and optical axis height greatly simplifies window designs.
Filtron technology enables ambient light spectral sensitivity close to that of the human eye, while the sensor's adoption of O-Trim™ technology provides an output tolerance of ≤ 10 %. The device offers detection from 0 lx to 167 klx and resolution down to 0.005 lx/ct, allowing for operation in applications with low-transmittance (dark) lens designs. The VEML7700 provides 100 Hz and 120 Hz flicker noise rejection and excellent temperature compensation from -25 °C to +85 °C. The device offers low power consumption down to just 2 µA in operating mode and 0.5 µA in shutdown mode.
The VEML7700's supply voltage range is from 2.5 V to 3.6 V, while its I²C bus voltage range is from 1.7 V to 3.6 V. Offered in a lead (Pb)-free, 4-pin molded package, the device is RoHS-compliant, halogen-free, and Vishay Green.
Samples and production quantities of the new ambient light sensor are available now, with lead times of eight weeks for large orders. Pricing for U.S. delivery only starts at $2.00 per piece in 3,000-piece quantities.
Vishay Intertechnology, Inc., a Fortune 1000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors, and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishay's product innovations, successful acquisition strategy, and "one-stop shop" service have made it a global industry leader. Vishay can be found on the Internet at www.vishay.com.
Link to Datasheet:Â http://www.vishay.com/ppg?84286 (VEML7700)
Link to Images:https://www.flickr.com/photos/vishay/albums/72157663832877719
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