Dual-colour red and IR diode balances signal levels for medical monitoring

Latest from Vishay is a new 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 such as smart watches and fitness bands, the VSMD66694 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 20 nm at 660 nm, and its balanced radiant power at red and IR wavelengths provides balanced signal levels for SpO2 and pulse rate monitoring. The emitter released today 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 degree angle of half-intensity and operates over a temperature range of -25C to +85C. 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 and halogen-free, and Vishay Green.