SFH 7074
Overview
The SFH 7074 is a high-performance integrated biomonitoring sensor specifically designed for photoplethysmogram (PPG) measurements. It features three different emitters - Green (526nm), Red (660nm), and Infrared (940nm) - alongside a sensitive photodiode to support multi-wavelength heart rate and pulse oximetry monitoring. The package includes an integrated light barrier to minimize optical crosstalk, which is essential for capturing high-quality physiological signals.
Why Choose This Part
The integrated light barrier significantly improves the signal-to-noise ratio by preventing internal optical leakage between the emitters and the detector. Its multi-wavelength design allows for both heart rate and blood oxygen monitoring within a single compact 10-pin SMD package. The sensor is optimized for high accuracy, supporting a bandwidth of up to 42 MHz for high-frequency sampling requirements.
Applications
Key Specifications
Getting Started
To evaluate this sensor, engineers should use an analog front-end (AFE) such as the TI AFE44xx series to drive the LEDs at 20mA and sample the photodiode output. Ensure the PCB layout includes a clean 5V to 16V supply for the sensor and strictly follows the manufacturer's recommendations for optical shielding and placement. Prototyping can be accelerated by using the OSRAM Vital Signs evaluation boards or generic PPG development kits.
