The Integrated Context Engine (ICE) for biosensing includes:

  • Renesas OB1203 reflective photoplethysmography (PPG), proximity (PS) and light / color (LS/CS, not used for this application) sensor
  • Telink’s TLSR8258F512 microcontroller with Bluetooth Low Energy radio
  • LiPo’s LP201030 rechargeable Li-ion battery, 3.7 V, 40 mAh, 10 x 30 x 2 mm3

The ICE hardware performs reflective, non-invasive measurements (for example at the fingertip), transmits the data via Bluetooth Low Energy to a smartphone or tablet, where the Heart Rate (HR) and blood oxygen saturation (SpO2) are determined by an Android app. During this process the proximity sensor function keeps the measurement running as long as there is a finger present.


  • OB1203 Sensor Features
    • Highly reliable and industry-proven OSIP package with integrated cover glass for hypoallergenic products
    • Integrated and factory trimmed LED source, driver and photodetector
    • PPG (Heart Rate and Blood Oxygen Concentration):
      • Aesthetic industrial design options with unique farredLED allowing SpO2 measurements behind visibly dark, IR-transmissive ink.
      • 16 to 18 bits output resolution
      • High speed sampling up to 3200 samples per second for highest resolution and improved SNR
      • On-chip averaging and FIFO data storage enable convenient asynchronous access to data
    • Proximity Sensor
      • Up to 16 bits resolution
      • Ambient light suppression
      • Analog and digital crosstalk cancelation
    • Wide operation temperature range: -40°C to +85°C
    • Wide supply voltage range
      • 1.7V to 3.6V for digital / analog
      • 3.3 V to 5.0 V for LEDs
    • I2C interface capable of 100kHz or 400kHz communication
    • Programmable level-based interrupt functions
    • Industry’s smallest package: 4.2 x 2 x 1.2 mm3 14-pin module
  • Radio Module Features
    • Telink TLSR8258F512
      • BT 4.2 BLE 2.4 GHz radio
      • 32-bit MCU @48MHz 512 kB flash, 32 kB SRAM
      • Wide supply voltage range: 1.9V to 3.6V
      • Compact size: 32 pin, 5.0 x 5.0 x 0.75 mm3 package
  • ICE Characteristics
    • PCB:
      • Operation temperature range: -40°C to +85°C
      • PCB supply voltage range: 3.3 V to 6.5V
      • PCB: 40mm x 11mm (20mm with program pads) x 5.0 mm with USB charge connector (3.1 mm without)
      • Program pad PCB section removable
    • Battery life:
      • 150x 30 s measurements
      • Typical PCB quiescence current: 0.5 μA at 4 V
      • Battery capacity: 40 mAh if charged up to 4.2 V
      • Battery operation: 3.3 V to 4.2 V
      • Rechargeable via USB Micro cable
      • > 70 % shelf: 1 year stored (-20°C to 30°C)
      • Battery operating temperature range -20C° to + 60°C



Type Title Date
Manual - Development Tools PDF 630 KB
Schematic Log in to Download PDF 44 KB
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Design & Development

Software & Tools

Software Downloads

Type Title Date
PCB Design Files Log in to Download CSV 1 KB
Software & Tools - Other APK 1.57 MB
PCB Design Files Log in to Download ZIP 7.47 MB
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