Implementation of Proximity Sensors in Audio Wearables



The integration of Smart sensors is the need for every technology sector all around the world. Implementing basic sensing elements with existing designs to improve the performance of the design is the ongoing approach for Smart technologies.


Enabling audio manufacturers of true wireless stereo earbud products to develop smaller and lighter designs, ams delivers the smallest digital proximity sensor module, which occupies only 1 mm cube of volume. This is more than six times smaller than the previous 2-in-1 proximity sensor module. Ams is an Austrian tech company which provides sensing and automation solutions.


Ams has launched TMD2635 which is a proximity-light based sensor. Ams said the proximity detection performance of the TMD2635 is comparable to that of earlier, larger modules used by the leading smartphone manufacturers, but in a much smaller form factor for wearable devices.

The TMD2635 module is a complete light-to-digital sensor module that integrates a low-power infrared VCSEL (Vertical Cavity Surface Emitting Laser) emitter, two sensor pixels for near- and far-field sensing, and a digital fast-mode I2C interface, in a miniature land grid array (LGA) package.

The IR proximity sensors provide in-and-out-of-ear detection to help extend battery life between charging and can be used with another TMD2635 to enable touchless gesture control. For additional power savings, the device has an average active-mode current consumption of 70 µA and 0.7 µA in Sleep mode which helps it in extended battery life.

Dave Moon, senior product marketing manager in Sensors told while talking about the product , “It has a split near-far field photodiode offset emitter to detector positioning which will help designers of wireless earbuds and other wearable and portable devices to have the freedom to optimize both the size and shape of the needed sensor apertures in their industrial designs and optimize their products for comfort and performance — either a 1.5-mm circular or a 1 × 2-mm oval aperture .”

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