Heart Rate, Blood Oxygen OB1203 Concentration, Pulse Oximetry, Datasheet Proximity, Light and Color Sensor Description Color Sensor Features The OB1203 Sensor Module integrates a multi-channel light sensor Four parallel channels (red, green, blue, clear) (LS/CS), a proximity sensor (PS), and a photoplethysmography Accurate Correlated Color Temperature (CCT) sensor (PPG). Accurate CIE 1931 XYZ (RGB) color measurement The light sensor can be configured as ambient light sensor (LS) to Very stable spectral response over angle of light incidence measure ambient light similar to the human eye experience or as Output resolution CS: 13 to 20 bits an RGB color sensor (CS). The module has a fully integrated biosensor for reflective photoplethysmography. With the approp- riate algorithm, it can determine human heart rate (HR), oxygen Proximity Sensor Features saturation (SpO2), respiration rate, and heart rate variability (a Integrated and trimmed LED source, driver, and photodetector measure of stress). The OB1203 integrates light sources and drivers in a single optically optimized package. Programmable pulsed LED up to 250mA output current High resolution (12 to 16 bits) A major LS application of the device is in smart phones or other mobile devices to enable brightness control of display panels. The Object movement detection (in/out) OB1203 can also determine proximity of nearby objects in order to Ambient light suppression > 100klx sun light support the activation of touch screen displays or system functions. Crosstalk cancelation (analog and digital) The sensor combines optical sensing features (CS, LS, and PS) and bio-sensing functionality (PPG) without needing a visible optical opening. The unique implementation of the OB1203 Physical Characteristics enables SpO2 measurements behind ink that is IR transmissive, Highly reliable and industry-proven OSIP package with but visibly dark, allowing implementation in aesthetic industrial integrated cover glass for hypoallergenic products designs. Wide operation temperature: - 40C to +85C Wide supply voltage: 1.7V to 3.6V Biosensor Features Typical active current at minimum duty cycle: SpO measurement behind visibly dark, IR transmissive ink 2 LS/CS:110A Industrys smallest optical biosensor module PS: 90A + LED current (typical ~300A average) Fully integrated and trimmed module, including two LEDs, Low standby current: 2A typical 250mA maximum drive current, and photodetectors I2C interface capable of Standard Mode (100kHz) or Fast Output resolution PPG: 16 to 18 bits Mode (400kHz) communication 1.8V to 3.3V logic compatible Data stored in 18-bit wide, 32-sample FIFO memory Programmable level-based interrupt functions with upper and Integrated averaging function for higher signal-to-noise ratio lower thresholds for extending battery life (SNR) and data rate reduction 3 Industrys smallest package: 4.2 2 1.2 mm 14-OSIP Programmable measurement rate: up to 3200 samples per module second Figure 1. 3D Package Rendering High SNR Ambient Light Sensor Features High lux accuracy over different light sources Absolute sensitivity: 0.06 lux to > 150000 lux Output resolution LS/CS: 13 to 20 bits Three LS/CS gain modes: x1 to x6 Highly linear output, 50Hz/60Hz light and fluorescent light flicker immunity 2021 Renesas Electronics Corporation 1 January 12, 2021 OB1203 Datasheet Biosensor, LS and PS Applications Application Circuit Mobile devices such as smartphones, smart accessories, Figure 2. Typical Circuit Only 6 Connections touch screen disable, display brightness and color adjust, smartwatches, secondary sensor for blood pressure VDD2 VDD1 LED VDD Head phones VDD Rup LVDD Hearables OB1203 IC VDD Fitness and wellness LED1 SCL SCL LED1 LED2 SDA SDA LED2 Occupancy INT INT Microcontroller Gesture detection OB1203 C VDD Module CLED Industrial applications such as proximity and light detection in VSS less than 1ms, fast light barriers, lighting control, robotics, AGND LGND agriculture and hydroponic light sensing, daylighting GND Figure 3. Block Diagram VDD OB1203 Module ADC ADC Main State Machine Fuses ADC Interrupt ADC Finite State INT Machine (FSM) LS ADC FSM Register SDA File I2C Light Metal SCL Sensor covered FIFO Ambient Light Register Cancellation ADC Sample Decimation nd 2 Order Filter Averaging (hybrid) SD PS/HR/ Crosstalk/Offset Reference SPO2 Cancellation Generation FSM Digital Block LVDD POR HP OSC LP OSC Low Power Analog Analog RED IR Regulator Support Power LED1 LED Proximity and (Bandgap) Supply Driver Biosensor LED2 Analog OB1203 IC Digital LGND AGND 2021 Renesas Electronics Corporation 2 January 12, 2021