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Vishay’s New Surface-Mount Ambient Light Sensing Photodiodes Are Industry’s First Qualified to Automotive Standard AEC-Q101; Feature Linear Response to Illuminance from 0.1 lux to 100 klux
MALVERN, Pa. — August 24, 2007 — Vishay Intertechnology, Inc. (NYSE: VSH) is broadening its Optoelectronics portfolio with the introduction of the first ambient light sensing photodiodes qualified to the AEC-Q101 standard, a reliability test qualification procedure for discrete semiconductors published by the Automotive Electronics Council.
A key component for automotive body control and passenger safety applications, ambient light sensors allow electronic systems to detect and respond to light in a manner similar to the human eye, eliminating the need for manual adjustments and reducing power consumption. They are typically used to turn on, turn off, or adjust features as a convenience, to conserve battery power, or to provide added safety. Their automotive applications include rain, light, and tunnel sensors; brightness control for dashboard and navigation displays; and automatically turning on the headlights at dusk.
The new TEMD6010FX01 and TEMD5510FX01 use Vishay’s exclusive infrared filtering epoxy technology to match the spectral sensitivity of the human eye with minimal sensitivity to light beyond the visible range. They also provide the benefit of having a closely similar response to either incandescent or fluorescent light, for which the TEMD6010FX01 and TEMD5510FX01 deliver excellent response ratios of 1.3 and 1.4 respectively. For comparison, a standard silicon infrared photo diode has a response ratio of 10.
The TEMD6010FX01 and TEMD5510FX01 provide a linear response to illuminance from 0.1 lux to 100 klux with good lot-to-lot repeatability over the extended operating temperature range of −40 °C to +100 °C. Lot-to-lot repeatability may allow customers to eliminate calibration steps in their manufacturing process. Competing sensors are unable to match this linear response at temperature extremes, particularly above +85 °C.
The new sensors join Vishay’s existing portfolio of ambient light sensing photo transistors, which are also qualified to the AEC-Q101 standard. They are RoHS-compliant, free of halogens, and compatible with lead (Pb)-free soldering. Samples are available now with lead times of six weeks.
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.