New Photodiode From ams OSRAM Improves Performance in Visible and IR Light Applications

Rhea-AI Summary

ams OSRAM has launched the TOPLED® D5140, SFH 2202, a photodiode designed to enhance performance in wearable devices. This innovative product offers significantly higher sensitivity and linearity compared to standard photodiodes, improving heart rate and SpO₂ measurements in difficult lighting conditions.

The D5140 achieves 30 times higher linearity in the infrared spectrum, enabling more accurate vital signs readings, particularly in fast-changing ambient light. This improvement helps manufacturers create premium wearable devices that distinguish themselves with reliable measurements.

The photodiode is now in volume production, allowing manufacturers to enhance product offerings and extend battery life while maintaining accurate measurements.

Positive

• Launch of the TOPLED® D5140, SFH 2202, enhances product differentiation for wearable devices.
• Achieves 30 times higher linearity in the infrared spectrum than standard alternatives.
• Improves heart rate and SpO₂ measurements in challenging ambient light conditions.
• Enables longer battery life with lower LED intensity for accurate readings.

Negative

• None.

• New TOPLED® D5140, SFH 2202 photodiode provides higher sensitivity and much higher linearity than standard photodiodes on the market today
• Wearable devices using the TOPLED® D5140, SFH 2202 will be able to improve heart rate and SpO₂ measurement in challenging ambient light conditions
• By using the TOPLED® D5140, SFH 2202, manufacturers of wearable devices aimed at the premium segment of the market can differentiate their products through superior performance in vital signs measurement

PREMSTAETTEN, Austria & MUNICH--(BUSINESS WIRE)-- ams OSRAM (SIX: AMS), a global leader in optical solutions, has launched the TOPLED® D5140, SFH 2202, a photodiode that offers improved performance compared to existing standard photodiodes, including higher sensitivity to visible light in the green part of the spectrum, and increased linearity.

These improved features enable smart watches, activity trackers and other wearable devices to measure heart rate and blood oxygen saturation (SpO₂) more accurately, by substantially reducing the effect of interference from ambient light, and improving the quality of the received optical signal.

Benefiting from various optimizations of the process technology with which the photodiode die is fabricated, the TOPLED® D5140, SFH 2202 achieves 30 times higher linearity in the infrared spectrum than standard photodiodes, according to ams OSRAM internal benchmarking. Laboratory characterization also shows substantially increased sensitivity at the green wavelength used for heart rate measurement in photoplethysmography (PPG) – a technique that tracks the peaks and troughs of light absorption by blood vessels.

When used in PPG systems, the highly linear TOPLED® D5140, SFH 2202 will enable manufacturers of wearable devices to achieve much higher accuracy in SpO₂ measurements in conditions exposed to strong or fast-changing ambient light intensity. A typical example of such conditions occurs when the user runs or cycles through a dense urban area and moves in and out of the shade thrown by tall buildings.

The TOPLED® D5140, SFH 2202’s higher sensitivity to green wavelengths improves heart rate measurement by enabling the system to operate with lower LED light intensity, saving power and helping to extend battery run-time, while maintaining highly accurate measurements. The TOPLED® D5140, SFH 2202’s specially designed package with black sidewalls minimizes internal cross-talk, further decreasing error in optical measurements and increasing the stability of heart rate measurements.

Florian Lex, Product Marketing Manager at ams OSRAM, said: ‘Premium products in the wearable device market add value by providing vital signs measurements that the user can trust. By designing out the photodiode’s high non-linearity, which impairs the operation of SpO₂ measurement circuits, ams OSRAM is enabling wearable device manufacturers to differentiate their products and secure a higher premium positioning in the competitive market for active lifestyle technology products.’

The TOPLED® D5140, SFH 2202 photodiode is in volume production now. Please click here for sample requests or for more technical information.

View source version on businesswire.com: https://www.businesswire.com/news/home/20230406005355/en/

Media Relations

Hilary McGuinness Fernholz

hilary.mcguinnessfernholz@ams-osram.com

press@ams.com

ams-osram.com

Source: ams OSRAM

FAQ

What is the new product launched by ams OSRAM?

ams OSRAM has launched the TOPLED® D5140, SFH 2202 photodiode.

How does the TOPLED® D5140 improve wearable device performance?

It offers higher sensitivity and linearity, enhancing heart rate and SpO₂ measurement accuracy.

When did ams OSRAM start volume production of the TOPLED® D5140?

ams OSRAM has begun volume production of the TOPLED® D5140 photodiode.

What applications benefit from the TOPLED® D5140 photodiode?

Wearable devices like smartwatches and activity trackers benefit from improved vital signs measurement.