OSRAM SFH7060 Sensor for wearables
The SFH7060 sensor from Osram Opto Semiconductors is designed to measure pulse rates and the oxygen saturation level of blood.
The new SFH7060 sensor from Osram Opto Semiconductors is designed to measure pulse rates and the oxygen saturation level of blood for fitness tracking in smartwatches and fitness armbands and other wearable applications.
The SFH7060 sensor from Osram Opto Semiconductors is designed to measure pulse rates and the oxygen saturation level of blood. Compared to predecessor SFH7050 it offers more excellent signal quality and less energy consumption. The target applications for this component include mobile devices such as smartwatches and fitness armbands.
SFH7060 consists of three green LEDs, one red LED, one infrared LED and one large-format photodiode, optically separated from the emitters. It works by sending light with different wavelengths through the skin and measuring absorption to determine pulse rate at the wrist with green light, and oxygen saturation level in the blood.
Efficient and reliable pulse measurements
The green LEDs (530 nm) are based on the latest high-efficiency UX:3 chip technology by Osram Opto Semiconductors. At their optimum operating point at a current of 20 mA, they deliver an optical output of 3.4 mW at a voltage of 3.2 V per chip.
More accurate blood oxygen measurements
Oxygen saturation in blood is calculated from the different absorption rates of red (660 nm) and infrared (940 nm) light. The quality of the measurements depends mainly on the achievable signal-to-noise ratio and on the linearity of the photodetector. The integrated photodiode with its active surface of 1.3 mm x 1.3 mm meets these requirements perfectly.
With the SFH7060’s bigger distance between the two transmitters and the photodiode compared to SFH7050, the light penetrates the skin deeper. This leads to more stable signals and a better signal-to-noise ratio.
Users can now choose between a highly efficient solution designed for pule rate measurements, an extremely compact sensor for combined pulse rate and blood oxygen measurements and a slightly larger version with the same but significantly improved functionality.
- Multi chip package:
- 3 green, 1 red, 1 infrared emitter, 1 detector
- Small package: (WxDxH) 7.2 mm x 2.5 mm x 0.9 mm
- Light Barrier to block optical crosstalk
- Improved geometry for optimized signal quality
- Wavelengths: 530 nm / 660 nm / 940 nm
- Optical output (per green LED) at 20 mA: 3.4 mW
- Photo-sensitive area: 1.7 mm²
- Heart rate monitoring
- Pulse oximetry
- Wearable devices (e.g. smart watches, fitness trackers, ...)
- Mobile devices
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