SFH 7018B
Overview
The SFH 7018B is a multi-wavelength emitter package specifically designed for optical heart rate monitoring and pulse oximetry. It integrates three distinct chips--Green (526nm), Red (660nm), and Infrared (950nm)--into a compact 2.4mm x 2.4mm SMT package. This allows for precise vital sign measurements by enabling separate control of each wavelength to detect different physiological parameters.
Why Choose This Part
This component features a high-performance clear silicone package and a wide 120-degree viewing angle for efficient light coupling into the skin. Each of the three emitters can be driven independently, providing engineers with the flexibility to optimize drive currents and duty cycles for power-constrained wearable designs. Its 2kV ESD rating and compact SMT footprint simplify board layout and improve system reliability.
Applications
Key Specifications
Getting Started
To evaluate this emitter, designers should pair it with a multi-channel LED driver and a high-sensitivity photodiode like the SFH 2704. Use a dedicated analog front-end (AFE) such as the MAX86141 or ADPD188BI to manage the timing and acquisition of the optical signals. Ensure the optical design includes proper light barriers between the SFH 7018B and the detector to prevent internal crosstalk.
