Vishay Intertechnology Inc of Malvern, PA, USA has introduced a new dual-color 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 Vishay Semiconductors VSMD66694 features peak wavelengths of 660nm (red) and 940nm (IR), and is built on SurfLight technology for what is claimed to be best-in-class radiant power of 9.5mW and 8.5mW, respectively.
For space-constrained devices like smart watches and fitness bands, the VSMD66694 can replace two leaded diodes with one component in a surface-mount package that can be combined with any custom-designed lens system. The device features a narrow spectral bandwidth of 20nm at 660nm and 40nm at 940nm, and its balanced radiant power at red and IR wavelengths provides balanced signal levels for SpO2 and pulse rate monitoring.
The new emitter provides fast switching times of 10ns and forward voltage down to 1.4V. Suitable for high-pulse-current operation to 1A at 100μs, the device features a ± 60° angle of half intensity and operates over a temperature range of -25°C to +85°C. The VSMD66694 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.
Samples and production quantities of the new dual-color red and IR emitting diode are available now, with lead times of 10 to 12 weeks for large orders.
