Vishay launches Dual-Colour Red and IR Emitting Diode
Vishay Intertechnology has introduced 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 by 2mm by 0.87mm package, the Vishay Semiconductors VSMD66694 features wavelengths of 660nm (red) and 940nm (IR) and is built on SurfLight technology for 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 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 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 to 85degC.
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