IR emitting diode saves space in wearable devices and patient monitoring systems

Stocked by Digi-Key, Vishay has introduced a dual-colour red and IR emitting diode designed to save space in wearable devices and medical patient monitoring systems. Offered in a compact 2mm x 2mm x 0.87mm package, the VSMD66694 features wavelengths of 660nm (red) and 940nm (IR) and is built on SurfLight technology for best-in-class radiant power of 9.5mW and 8.5mW, respectively. For space-constrained devices like smart watches and fitness bands, the device can replace two leaded diodes with one component in a surface-mount package that can be easily combined with any custom-designed lens system. The device features a narrow spectral bandwidth of 20nm at 660nm and its balanced radiant power at red and IR wavelengths provides balanced signal levels for SpO2 and pulse rate monitoring. The emitter provides fast switching times of 10ns and forward voltage down to 1.4V. Suitable for high pulse current operation to 1A at 100 µs, the device features a ±60 degree angle of half intensity and operates over a temperature range of -25C to 85C. It provides a moisture sensitivity level (MSL) of 3 in accordance with J-STD-020 for a floor life of 168 hours, supports lead (Pb)-free reflow soldering, and is RoHS-compliant, halogen-free, and Vishay Green.