Si117x Biometric Optical Sensor Products

Our Si117x module combines the lowest power optical heart rate (HR) solution in the industry with best-in-class power. The small, integrated module supports up to four distinct LEDs (all of which can be driven simultaneously) and simplifies optical design. The devices also support our proprietary, motion-compensated HR algorithm, optimized to run on our Gecko MCUs and Wireless Gecko SoC’s. This level of unparalleled integration enables system-level power and performance optimization and reduces time-to-market for wearable makers looking to add HR to their systems.

The Si1172 and Si1173 products also have the capability to do single channel ECG measurements alongside optical HR, allowing you to add additional value and gather more physiological information from the user.

Small package
3.7x7.0 mm
LED drivers
Up to 4

Si117x Biometric Sensor Common Specs

  • Fully integrated Heart Rate Module IC
  • Up to 4 LEDs with lensing and optical blocking
  • High sensitivity photodiode
  • Low noise analog front-end and ADC
  • Four independent, regulated LED drivers (1.7 to 310mA)
  • < 50 uA current for continuous HR (LED + Sensor Power)
  • Built-in 2k buffer
  • Supports synchronization with an accelerometer
  • 24 bit ADC and AFE with over 100 dB dynamic range
  • Small size (3.7x7.0 mm)
  • I2C and SPI support
  • < 500 nA standby current
  • Available with high quality, motion compensated HR algorithm optimized for wrist-based sensing.
  • Built-in ECG front-end for single channel ECG measurements (Si1172 and Si1173)
Find the Right Si117x Device Select Columns
Select Columns
Part Number Description LED Drivers Package Type Package Size (mm)
Optical PPG module with PD/LED for heart rate monitoring 4 LGA Module 3.7x7.0
Optical PPG module with PD/LED for heart rate monitoring 4 LGA Module 3.7x7.0
Optical PPG module with PD/LED for heart rate monitoring 4 LGA Module 3.7x7.0
Optical PPG module with PD/LED for heart rate monitoring 4 LGA Module 3.7x7.0
Optical PPG/ECG module with PD/LED for heart rate monitoring with Silicon Labs HRM algorithm 4 LGA Module 3.7x7.0
Optical PPG/ECG module with PD/LED for heart rate monitoring with Silicon Labs HRM algorithm 4 LGA Module 3.7x7.0
Optical PPG/ECG module with PD/LED for heart rate monitoring with Silicon Labs HRM algorithm 4 LGA Module 3.7x7.0
Optical PPG/ECG module with PD/LED for heart rate monitoring with Silicon Labs HRM algorithm 4 LGA Module 3.7x7.0
Optical PPG/ECG module with PD/LED for heart rate monitoring 4 LGA Module 3.7x7.0
Optical PPG module with PD/LED for heart rate monitoring with Silicon Labs HRM algorithm 4 LGA Module 3.7x7.0
Optical PPG module with PD/LED for heart rate monitoring with Silicon Labs HRM algorithm 4 LGA Module 3.7x7.0
Optical PPG module with PD/LED for heart rate monitoring with Silicon Labs HRM algorithm 4 LGA Module 3.7x7.0
Optical PPG module with PD/LED for heart rate monitoring with Silicon Labs HRM algorithm 4 LGA Module 3.7x7.0

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