SFH 7070 - BIOFY PPG Biomonitoring Sensor Module | ams OSRAM
MPN: SFH 7070 ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
SFH 7070 Overview
A reflective optical biosensor module integrates light emitters and a photodetector on one substrate so that light reflected from human skin — modulated by blood volume changes — can be measured without a transmissive finger clip. Within the sensing hierarchy, the SFH 7070 belongs to the optical sensor -> photoplethysmography sensor -> biometric/biomonitoring module class, sitting above discrete LEDs and photodiodes and below complete vital-sign signal processor ICs.
Key features include an integrated light barrier that blocks optical crosstalk between the emitters and detector, ESD robustness of 2 kV according to ANSI/ESDA/JEDEC JS-001 (HBM, Class 2), and a wide 120-degree beam angle that maximizes returned PPG signal over skin. The green emission wavelength is well absorbed by hemoglobin and penetrates shallowly, which is ideal for wrist-worn heart-rate tracking because it suppresses motion artifacts compared with infrared.
Technically, the multi-chip construction places two green emitters flanking the detector chip behind the optical barrier, allowing the designer to drive both emitters sequentially or in parallel to increase photon flux into dark or highly pigmented skin, improving SNR of the AC PPG component. Surface-mount termination supports standard reflow assembly on flexible or rigid PCBs, and the low profile of 0.9 mm suits slim smartwatch enclosures.
Typical applications include wrist heart-rate monitors, fitness bands, smartwatches, and medical-grade pulse-oximetry-adjacent biomonitoring patches where strong green PPG signals are required.
When designing with the SFH 7070, drive the LEDs with low-noise constant-current pulses and time-synchronize sampling of the detector with emission windows to reject ambient light; verify the datasheet for absolute maximum current ratings per emitter.
This page synthesizes distributor availability data, datasheet-derived specifications, alternatives analysis, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for SFH 7070 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SFH 7072
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SFH 7060
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SFH 7050
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SFH 7070 Maximum Ratings & Electrical Characteristics
| Product Type | Reflective optical biomonitoring sensor module (BIOFY) |
| Configuration | Two green emitters + one detector (multi-chip) |
| Package Size (W x D x H) | 7.5 mm x 3.9 mm x 0.9 mm |
| Beam Angle | 120 degrees |
| Optical Crosstalk Control | Integrated light barrier |
| ESD Rating | 2 kV (HBM, Class 2, ANSI/ESDA/JEDEC JS-001) |
| Mounting Type | Surface Mount |
| Termination | Solder |
| Package Style | 6-SMD, no lead |
| Operating Temperature | -40C to +85C |
| Signal Optimization | Strong PPG signal |
| Application | Biomonitoring / photoplethysmography (PPG) |
SFH 7070 6-smd, no lead Pin Configuration Guide
Pin configuration for SFH 7070 (6-smd, no lead package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for SFH 7070.
Refer to the datasheet for full pin configuration.
Typical Applications
SFH 7070 is suitable for 6 applications: Wrist-Worn Heart Rate Monitoring, Fitness Bands and Activity Trackers, Smartwatch Optical Heart-Rate Arrays, Medical-Grade Biomonitoring Patches, Wearable SpO2-Adjacent Pulse Sensing Research, Industrial and IoT Proximity-Based Biometrics.
Wrist-Worn Heart Rate Monitoring
The SFH 7070 fits wrist heart-rate monitoring because its dual green emitters produce a strong PPG signal through shallow skin layers where capillary blood-volume modulation is most visible, and its 120-degree beam angle captures a wide return cone from curved wrist geometry. In a typical smartwatch stack, the module sits against the skin on the PCB underside; emitters are pulsed sequentially while the detector output feeds a transimpedance amplifier and ADC synchronized to the emission windows. The integrated light barrier prevents direct emitter-to-detector leakage that would otherwise mask the microvolt-level AC PPG component. Driving both emitters alternately rejects ambient light and improves motion-artifact immunity, at the cost of roughly doubling LED power versus single-emitter drive.
Recommended
Fitness Bands and Activity Trackers
For fitness bands, the SFH 7070 offers a compact 7.5 mm x 3.9 mm x 0.9 mm footprint and surface-mount termination compatible with flexible PCB assembly, which matters because band housings are thinner and more curved than watch bodies. The strong PPG signal optimization helps at lower LED currents, directly extending battery life — the dominant constraint in continuous heart-rate tracking. The -40C to +85C operating range withstands outdoor athletic use and body-temperature extremes. Designers should drive the emitters with short duty-cycled current pulses (typically a few percent) and use the light-barrier-isolated detector path with ambient-light subtraction sampling during LED-off windows to keep SNR high while minimizing average power consumption.
Recommended
Smartwatch Optical Heart-Rate Arrays
In smartwatch multi-channel vital-sign arrays, several SFH 7070 modules are placed around the watch back to sample multiple wrist locations, improving robustness against strap looseness and motion. Each module's integrated crosstalk barrier simplifies dense optical layouts that would be impractical with discrete LEDs and photodiodes. The ESD rating of 2 kV HBM Class 2 (per ANSI/ESDA/JEDEC JS-001) supports manufacturing handling, though assembly should still occur at ESD-protected stations. Performance considerations include cross-talk between adjacent modules — time-division multiplexing of each module's emitters and per-channel synchronous detection are the standard techniques to keep channels independent within the duty-cycle budget.
Recommended
Medical-Grade Biomonitoring Patches
Adhesive biosensor patches for continuous patient monitoring use the SFH 7070 as the optical front end for pulse-rate measurement, benefiting from its optimized strong PPG output on varied skin tones through the dual-emitter drive scheme. The -40C to +85C range covers sterilization-adjacent and transport conditions, and solder termination survives flexing when mounted on polyimide flex circuits. System designers must add their own LED drivers, low-noise analog front end, and compliance electronics since the module provides only the optical path. Note that using the SFH 7070 in a medical product requires the manufacturer to complete IEC-level system qualification; ams OSRAM supports field returns with failure analysis (FAR) processes for quality management.
Recommended
Wearable SpO2-Adjacent Pulse Sensing Research
Research prototypes exploring pulse waveform analysis, blood-pressure estimation from pulse transit time, and perfusion-index algorithms use the SFH 7070 because its repeatable, factory-aligned optical geometry produces more reproducible signals than hand-assembled discrete optical benches. The two green emitters can be driven at different currents to probe different effective penetration depths, giving researchers a simple depth-sensitivity knob within one package. Acquisition is typically performed at 25-500 Hz with 16-bit or higher ADC resolution to capture the AC PPG morphology. The main trade-off is the green-only wavelength set: infrared or red wavelengths needed for classic SpO2 ratio-of-ratios require additional discrete emitters alongside the module.
Recommended
Industrial and IoT Proximity-Based Biometrics
Beyond consumer wearables, the SFH 7070's strong green PPG output serves niche industrial uses such as driver-monitoring touch points, authentication grips, and operator-presence detection on machinery handles, where contact PPG both confirms presence and can derive pulse rate. The -40C to +85C industrial temperature range and 2 kV HBM ESD class 2 rating suit factory-floor electrical environments, while the light-barrier construction keeps performance stable against housing tolerances. Designers should account for ambient green-light interference from industrial lighting by using synchronized sampling and LED-off background subtraction. The 0.9 mm height allows embedding into metal or plastic housings with a simple optical window and opaque gasket for ambient light exclusion.
Recommended
Recommended Products Summary
Engineering reference data for SFH 7070 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SFH 7072 | SFH 7060 | SFH 7050 |
|---|---|---|---|---|
| Brand | ams OSRAM | ams OSRAM | ams OSRAM | ams OSRAM |
| Primary Application | Strong PPG signal for wrist biomonitoring | Next-gen biomonitoring | Heart-rate monitoring | Compact pulse sensing |
Key Differentiators
- Dual green emitters for stronger PPG signal (vs SFH 7060)
- Integrated optical crosstalk barrier (vs Discrete LED + photodiode builds)
- Slim 0.9 mm profile (vs SFH 7050)
Design Notes
Drive the two green emitters with pulsed constant-current sources and time-synchronize the detector sampling to the emission windows. Use an LED-off sampling window to capture ambient light and subtract it from the on-samples. The AC PPG component is small relative to the DC skin-reflection component, so the transimpedance amplifier should use low-bias-current input stages and a gain plan that avoids saturating on the DC term. Alternating between the two emitters also helps decorrelate motion artifacts.
The SFH 7070 is a surface-mount 6-SMD no-lead module at 7.5 mm x 3.9 mm x 0.9 mm; follow the ams OSRAM recommended land pattern exactly to preserve optical alignment between the on-board light barrier and the housing aperture. Use an opaque gasket or housing boss around the module to exclude ambient light paths that bypass the optical window. Green LEDs are ESD-sensitive — despite the 2 kV HBM Class 2 rating, assemble at ESD-protected stations with grounded tooling.
Do not assume pin compatibility with other BIOFY family modules (SFH 7060, SFH 7050, SFH 7072) — package dimensions and internal chip placement differ, and a socketed substitution will misalign the optical path. Also verify absolute maximum forward current per emitter in the ams OSRAM datasheet before sizing the LED driver; exceeding it degrades light output permanently. Finally, plan temperature compensation: LED efficiency and detector dark current both drift across the -40C to +85C range.
Compliance Information
ESD classification per ANSI/ESDA/JEDEC JS-001 (HBM, Class 2) is specified in the datasheet. RoHS/REACH status was not present in the verified data and must be confirmed from the ams OSRAM product page.
