Compact 9.5mW IR emitting diode cuts space for wearables

Article By : Vishay Intertechnology

Vishay’s VSMD66694 comes in a 2mm x 2mm x 0.87mm package and boasts wavelengths of 660nm (red) and 940nm (IR), built on SurfLight technology to deliver radiant power of 9.5mW and 8.5mW.

Vishay Intertechnology has brought to market what it describes as a dual-colour red and IR emitting diode geared to save space in medical patient monitoring systems and wearable devices. The Vishay Semiconductors VSMD66694 comes in a compact 2mm x 2mm x 0.87mm package and boasts wavelengths of 660nm (red) and 940nm (IR), built on SurfLight technology to deliver radiant power of 9.5mW and 8.5mW, respectively, detailed the company.

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 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 promises switching times of 10ns and forward voltage down to 1.4V. Suitable for high pulse current operation to 1A at 100µs, the device touts 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 dual-colour red and IR emitting diode are available with lead times of 10 to 12 weeks for large orders.