VSMD66694 dual-color red and IR- emitting diode. Source: Vishay
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 provides fast switching times of 10 ns and forward voltage down to 1.4 V. Suitable for high pulse current operation to 1 A at 100 µs, 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, can be reflow soldered, and is RoHS-compliant and halogen-free.
Samples and production quantities of the diode are available now, with lead times of 10 to 12 weeks for large orders.