Not Recommended for New Designs: This part is Not Recommended for New Designs (NRND).
Device/Module image


Biometric HRM Sensor Modules with Built-in LEDs

The Si1175K1-GM Biometric Optical Sensor combines the lowest power optical heart rate monitoring (HRM) solution in the industry with best-in-class power. The small, integrated module contains lensing, photodiode, AFE/ADC and 1 Green, 1 Red, 1 IR LED Module (all of which can be driven simultaneously), and simplifies optical design. The sensor can capture high quality PPG waveforms to support continuous HR measurement while consuming less than 50 uA of current (LED + Sensors). Other features include a >100 dB dynamic range, built-in buffer, I2C/SPI support and support for accelerometer synchronization.

The devices also support our proprietary, motion compensated HR algorithm, optimized to run on our Gecko MCUs and wireless SoCs. This level of unparalleled integration allows for system level power and performance optimization, and reduces time to market for wearable makers looking to add HR to their system.

Purchasing Information: Available in limited quantities for qualified customers (NDA required).

Please contact sales for pricing and product information.


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LED Drivers
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LED Drivers
LGA Module
Package Size (mm)
Find quality, environmental, shipping, and supply chain information for Silicon Labs devices. You can also download the following environmental documents for each part number: Detailed Device Composition (MDDS), IPC 1752-2 Class 6 (XML format), RoHS Certificate of Compliance, ICP test reports, Halogen-Free Certificate of Compliance, PFOS/PFOA Certificate of Compliance, and REACH Declaration.
Company Name Silicon Laboratories, Inc.
Company Address 400 W. Cesar Chavez Austin, TX 78701
Date of Incorporation 1996
Terms and Conditions View PDF
California SB 657 View PDF
Corp Social Responsibility 1996

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