SFH 2707
Overview
The SFH 2707 is a high-performance silicon PIN photodiode designed specifically for pulse oximetry and heart rate monitoring. It features an optimized active area of 4.86 square millimeters in a compact 1.8mm by 2.7mm Chip LED package, providing a high signal-to-noise ratio in space-constrained wearable designs. The device is peak-sensitive at 940nm but maintains a wide spectral range from 400nm to 1100nm.
Why Choose This Part
The component offers an improved active area to package ratio, maximizing light collection in a small footprint. With a low typical dark current of 600pA and a 16V maximum reverse voltage rating, it enables high-precision measurements with minimal noise interference. The clear epoxy package and surface-mount design ensure compatibility with standard high-volume reflow soldering processes.
Applications
Key Specifications
Getting Started
To evaluate this photodiode, integrate it into a transimpedance amplifier (TIA) circuit using a low-noise precision op-amp. Ensure the PCB layout minimizes stray capacitance around the anode and cathode pads to maintain the 1MHz bandwidth. For initial testing, the part can be paired with 940nm IR emitters like the SFH 4045N to establish a baseline signal-to-noise ratio.
