Si1143/44 Heart Rate Monitoring Solution

The Si1143/44 solution combines a high precision optical sensor, an LED source, a proprietary algorithm, and a low power MCU to deliver the industry’s lowest power, dynamic heart rate monitoring (HRM) solution. Target markets include fitness bands, smart watches, and consumer health applications.
In addition to low power, the Si1143/44 solution provides performance that rivals the traditional chest strap. The Si1143/44 uses a single green LED, which allows it to be packaged in an exceptionally small package (2.9 mm x 4.9 mm.)
This performance is delivered at a fraction of the cost of the best optical solutions in the market.


  • Exceptional Performance
  • High level of integration for ease of design
    • Integrates Si114x optical sensor, Green LED, optical blocking, lens and apertures, dynamic algorithm, and low power MCU
    • Small Package (2.9 mm x 4.9 mm)
  • Optional digital UV Index sensor
    • Determine real-time UV sun exposure and cumulative UV sun exposure
  • Long battery life
    • < 1mA average operating current (all HRM currents)
    • < 500nA standby current


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Data Sheet (3)

Data Short (2)

Si1143-AAGX Data Short
0.912/28/2015333 kB
Si1144-AAGX Data Short
0.912/28/2015377 kB

User Guides (4)

Biometric EXP Evaluation Board User's Guide
0.412/10/2015845 kB
Sensor Puck User's Guide
1.0699 kB
Si1140-DK User's Guide
0.37/18/2013422 kB
Si114x-MFB User's Guide
0.27/18/2013625 kB

Quick Start Guide (3)

IRSlider2EK Si1142 Demo Board Quick-Start User's Guide
0.31/11/2011161 kB
Optical Sensor Board Quick-Start Guide
0.26/22/2015263 kB
Si114x-MFB Quick-Start Guide
0.26/14/2013183 kB

Application Notes (5)

White Papers (2)

PCN (4)


Design Tools

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Software (5)

Biometric-EXP-EVB Demo
1.09/3/20148817 kB
Manual Install of Sensor Puck Android App
3/30/201524586 kB
Manual install of Sensor Puck Android App
1.14/6/201525545 kB
Sensor Puck
1.03/29/201660 kB
Si114x Programmer's Toolkit V2.3
V2.36/6/2015139462 kB

Schematics/Layout (2)

Product Matrix
Part NumberDev KitDescriptionDatasheetUV IndexLEDsGesture/Motion SensingAmbient Light SensorInterfacePackage TypePackage Size
Proximity + Ambient Light Sensor
No33D Gesture SensingYesI2CQFN102x2 mm
Si1143-AAGX-GMHRM focused module w Green LED, without algorithmNo1YesI2CLGA Module2.9x4.9
Si1144-AAGX-GMHRM Focused Module w Green LED, and algorithmNo1YesI2CLGA Module2.9x4.9
    Si1144 Heart Rate Monitor Performance Graph


    Product Matrix





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