The OB1203 is a fully integrated optical sensing module for Pulse Oximetry (PPG - photoplethysmography), multi-channel Color Sensing (CS), Ambient Light Sensing (LS) and Proximity Sensing (PS).

With the appropriate algorithm, it can determine human heart rate, blood oxygen saturation (SpO2), respiration rate and heart rate variability (a measure of stress). The OB1203 integrates all light sources, drivers, and the sensor elements, in a single optically optimized package.

A major application of the device is consumer and mobile devices, enabling biosensing features and display control in a single device. The OB1203 can determine proximity of nearby objects in order to support the deactivation of touch screen displays or the detection of a finger for pulse oximetry measurements, for example. The sensor combines optical sensing features (CS, LS, PS) and bio-sensing functionality (PPG) without the need for a transparent optical opening. The unique implementation of OB1203 enables SpO2 measurements behind IR transmissive ink, making the device virtually invisible, and allowing for aesthetic industrial designs.

Features

  • Biosensor:
    • SpO2 measurement behind IR transmissive, but visibly dark ink
    • Industry’s smallest package: 4.2mm × 2mm × 1.2mm
    • Fully integrated and trimmed module including two LEDs, 250mA max drive current and photodetectors 
    • High SNR and Crosstalk cancelation (analog and digital)
  • Ambient Light / Color Sensor:
    • High illuminance accuracy across various light sources
    • Absolute sensitivity: 0.06 lx to > 150,000 lx
    • Output resolution LS/CS: 13 to 20 bits
    • Four LS/CS gain modes: x1 to x6
    • Highly linear output, 50Hz/60Hz light and fluorescent light flicker immunity
  • Proximity Sensor:
    • Integrated and trimmed LED source, driver (250mA) and photodetector
    • High resolution (12 to 16 bits)
    • Object movement detection (in/out)
    • Ambient light suppression > 100 klx sun light

descriptionDocumentation

Title language Type Format File Size Date
Datasheets & Errata
star OB1203 Datasheet Datasheet PDF 940 KB
User Guides & Manuals
OB1203 Thermal and Optical Design-in Guidelines Manual - Hardware PDF 1.10 MB
OB1203 Regulatory Certifications Guide PPTX 272 KB
Application Notes & White Papers
OB1203 Evaluation Kit Example Code Application Note PDF 948 KB
OB1203 Pulse Oximeter Algorithm for SpO2, Heart Rate, and Respiration Rate Application Note PDF 592 KB
OB1203 Heart Rate, Blood Oxygen Concentration, Pulse Oximetry, Proximity, Light and Color Sensor: Sensor Programming Application Note PDF 122 KB
OB1203 Heart Rate, Blood Oxygen Concentration, Pulse Oximetry, Proximity, Light and Color Sensor: Proximity Sensing Application Note PDF 213 KB
OB1203 Heart Rate, Blood Oxygen Concentration, Pulse Oximetry, Proximity, Light and Color Sensor: RGB Application Note PDF 599 KB
OB1203 Heart Rate, Blood Oxygen Concentration, Pulse Oximetry, Proximity, Light and Color Sensor: Signal to Noise Ratio Application Note PDF 437 KB
Other
Recommended Use of Finger Holder during Reflective PPG Measurements Technical Brief PDF 187 KB
OB1203 - All-in-One Bio and Light Sensor Overview Overview PDF 1.16 MB

file_downloadDownloads

Title language Type Format File Size Date
Software
OB1203 3D CAD model Software & Tools - Software STEP 1.10 MB

memoryBoards & Kits

Part Number Title Type Company
OB1203SD-RL-EVK Heart Rate, SpO2 and Respiration Rate Evaluation Kit with RL78 16-bit Processor and OLED Display Evaluation Renesas
OB1203SD-BT-EVK Integrated Context Engine for Heart Rate and Blood Oxygen Saturation Measurement with Bluetooth® Low Energy Evaluation Renesas
US082-OB1203EVZ Pulse Oximetry, Proximity, Light, and Color Sensor Pmod™ Board (Renesas Quick-Connect IoT) Evaluation Renesas