1. Product Overview
The SFH 7016, developed by ams OSRAM, is a compact optical device that integrates multi-wavelength emitters and a photodetector, specifically designed for heart rate and blood oxygen (SpO₂) monitoring in wearable devices. Housed in a 4.0 × 5.1 mm package, it incorporates LEDs emitting at 530 nm (green), 655 nm (red), and 940 nm (infrared), along with a photodiode for continuous optical acquisition of vital signs in both medical and consumer-grade wearables.
2. Key Specifications
Parameter | Specification |
Emission Wavelengths | Green (530 nm), Red (655 nm), Infrared (940 nm) |
Photodetector | Integrated photodiode for detecting reflected signals from skin |
Package Dimensions | 4.0 mm × 5.1 mm × 1.0 mm (compact form factor) |
Emitter Layout | 3×2 LED array for improved signal uniformity and SNR |
Target Applications | PPG-based heart rate, SpO₂, and blood pressure estimation |
Operating Voltage | 1.8 V – 3.3 V (depends on drive circuitry) |
Typical Forward Current | 20 mA (recommended) |
Typical Forward Voltage | Green: 2.4 V, Red: 1.9 V, IR: 1.3 V |
Optical Window | Low cross-talk structure; optimized for skin contact |
Package Type | Surface-mount (SMD); suitable for automated assembly |
3. Design Advantages
(1) Optimized Multi-Wavelength Emission
The integration of green, red, and infrared LEDs enables accurate acquisition of optical signals required for both PPG and SpO₂ measurement. The spatial separation of the wavelengths reduces interference, enhancing multi-channel signal reconstruction.
(2) High Integration, Compact Design
All emitters and the photodiode are integrated in a single package, reducing BOM complexity and simplifying optical coupling. This is particularly beneficial for minimizing device thickness and power consumption in wearables.
(3) Robustness for Motion Scenarios
The array configuration helps maintain high signal integrity even during user motion, improving signal-to-noise ratio in dynamic environments such as sports or daily activity tracking.
4. Application Scenarios
Application | Functional Role |
Smart Wearables | Real-time heart rate and blood oxygen monitoring using PPG technology |
Medical Health Devices | Blood flow and pulse waveform analysis for general health monitoring |
Physiological Modules | Embedded in Bluetooth or IoT devices for remote vital sign tracking |
Fitness Tracking | Enhanced heart rate accuracy when paired with accelerometers or IMUs |
5. System Integration Guidelines
- Drive Circuitry: Use constant current drivers per LED channel. The typical drive current is 20 mA, with forward voltages of 2.4 V (green), 1.9 V (red), and 1.3 V (infrared) to ensure consistent optical output.
- Optical Design: Implement a flexible light guide or window in contact with the skin to suppress ambient light interference and improve comfort.
- Signal Processing: Pair with high-resolution ADCs and filtering algorithms to extract PPG waveforms, respiratory rate, or perform signal fusion with motion data.
- Thermal Considerations: For high duty cycle operation, limit pulse width to prevent local heating that may affect accuracy.
6. Product Family Comparison
Model | Wavelengths (nm) | Detector Type | Package (mm) | Key Features | Typical Use Case |
SFH 7016 | 530 / 655 / 940 | Single photodiode | 4.0 × 5.1 × 1.0 | Standard layout, low cross-talk 3-color array | Fitness bands / Smartwatches |
530 / 655 / 940 | Single receiver | 4.7 × 2.5 × 0.9 | Slimmer package for ultra-thin devices | Earbuds / Clip-on oximeters | |
525 / 660 / 880 | High-sensitivity PD | 7.0 × 2.8 × 0.9 | Higher optical power for deeper penetration | Premium sports watches / BP estimation | |
540 / 660 / 940 | Single-channel PD | 4.7 × 2.5 × 0.9 | Cost-effective entry-level solution | Basic fitness trackers |
Note: Each model is optimized for different optical and system-level requirements. Selection should be based on factors such as device thickness, power consumption, and measurement accuracy.
7. Packaging & Design Resources
The SFH 7016 uses a JEDEC-compliant SMD package suitable for reflow soldering and high-volume assembly. ams OSRAM provides optical simulation models, CAD footprints, and integration guidelines for fast system design. WIN SOURCE offers this model with in-stock availability along with downloadable EDA resources and 3D packages.
With its compact size, integrated multi-wavelength emitters, and optimized signal acquisition design, the SFH 7016 is a proven solution for non-invasive, continuous vital sign monitoring in wearable electronics. Its robust performance under motion and system-friendly integration features make it a reliable component for developers building next-generation optical health sensors.
To explore more component specifications, packaging models, and inventory availability, please visit the official WIN SOURCE website.
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