SB220
The SB220 is a monolithic PPG sensor that enables high-fidelity PPG signal sensing with an ultra-low power consumption.
Characteristics
- Photosensitive pixel array (128×128 pixels)
- Analog Front-End (AFE) for PPG applications
- Integrated analogue-domain ambient light cancellation
- Analog-to-Digital Conversion (ADC) with variable resolution
- 2 multiplexed LED drivers for applications such as oximetry
- Fully programmable through 1 MHz SPI interface
- 20 µA consumption
- High quantum efficiency (QE) of >80%
- Multiple Clocking options
- Flexible sampling rate with predefined frequencies and sample-on-trigger option
- Programmable analogue gain
- Programmable ADC resolution of 12/14 bits
- Programmable LED pulse width, drive current, and multiplexing scheme
- Programmable FIFO depth of 64/128 words
As different light wavelengths are required depending the application, the SB220 has a high QE over a large spectrum
Applications
Measure of Heart rate, Blood oximetry (SpO2), Inter-beat interval, Heart Rate Variability, Respiration Rate and Blood Pressure to be used in:
- Hearing aids
- Earbuds
- Smart rings
- Wrist fitness and activity monitors
- Smartwatches
- Smartphones
Demonstrators
In order to facilitate evaluating the SB220 PPG sensor in real conditions, different demonstrators are available for different body positions:
- On fingers
- On the tragus and the antitragus (concha)
Ring SBF2200
