SYS-CON MEDIA Authors: Liz McMillan, Zakia Bouachraoui, Elizabeth White, Pat Romanski, Yeshim Deniz

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ams Launches New Sensors for Smart Home Devices That Optimize Brightness in Any Lighting Condition

ams (SIX: AMS), a leading worldwide supplier of high performance sensor solutions, today introduced a new family of ambient light and proximity sensors which offer high sensitivity, low-power, and small package size required for use in display/LED brightness control in consumer electronics devices. The family includes the TSL2540 and TSL2541 ambient light sensors and the TSL2740, a combined ambient light and proximity sensor.

The new family delivers very high sensitivity when detecting ambient light at an intensity as low as a few millilux – the equivalent of a clear night sky with no moonlight. With their wide dynamic range they operate effectively in lighting conditions ranging from bright sunlight to a dark room, and behind inked cover glass. The sensors enable automatic adjustment of LCD display backlighting or of indicator LEDs in response to changes in the brightness of the ambient light.

All three new optical sensors are offered in a miniature 2.0mm x 2.0mm 0.5mm low-profile QFN package which is small enough for compact consumer devices such as smart home assistants. The TSL2541’s package is made with a special dark compound which makes the device almost undetectable when mounted under inked cover glass.

ams is demonstrating these optical solutions at Sensors Expo in booth 232 (San Jose, California, 27-28 June, 2018).

The TSL2540,TSL2541 and TSL2740 are equipped with separate photopic ambient light and infrared light sensing channels made with interferometric IR and photopic filters deposited directly on the silicon. The photopic channel approximates the human eye’s response to light intensity under widely varying lighting conditions and through very dark attenuated materials.

The TSL2740 performs proximity sensing by measuring reflected IR light emitted from an external LED. Programmable proximity offset adjustability compensates for crosstalk effects from the IR LED in relation to proximity events at a range of up to 10cm.

“Ambient light and proximity sensors are widely used today in smartphones and tablets. Thanks to the high sensitivity and package size of the new product family, ams addresses emerging market applications such as smart home devices, IoT hubs and consumer electronics. Flexible industrial design is a critical requirement for home devices, and the small form factor of this family of products makes them ideal for these applications,” said David Moon, Senior Marketing Manager for the

Advanced Optical Solutions business at ams.

The TSL2540, TSL2541 and TSL2740 are available now in production volumes. Unit pricing is $0.44 for the TSL2540 and TSL2541 and $0.46 for the TSL2740 in an order quantity of 5,000 units.

Evaluation kits for all three devices are now available. For sample requests or more technical information, go to www.ams.com/ambient-light-sensors

Download press picture at https://ams.com/press-releases

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