The TMD2635 allows designers of True Wireless Stereo (TWS) earbud products to produce smaller, lighter earbuds. It is a full light-to-digital sensor module that includes a low power infrared VCSEL (Vertical Cavity Surface Emitting Laser) emitter, two sensor pixels for near- and far-field sensing, and an I2C interface in the LGA package. The device has been designed to offer power-saving benefits because of the small battery capacity and size of a wireless earbud product. It has an average active-mode current consumption of 70µA and 0.7µA in Sleep mode.
The design of the TMD2635’s optical stack and the high performance of the internal laser emitter produce outstanding crosstalk rejection, high immunity to interference from ambient light, and highly effective algorithms which convert infrared light measurements to accurate proximity detection results.