Preliminary Short-Form Datasheet OB1203 (IDT)

Digital RGB + IR / Ambient Light, OB1203 Proximity, Pulse Oximeter and Preliminary Heart-Rate Sensor Short-Form Datasheet Description Color Sensor Features
IDT’s OB1203 Sensor Module integrates a multi-channel light  Four parallel channels (red, green, blue, clear) sensor (LS/CS), a proximity sensor (PS), and a photoplethys-  Accurate correlated color temperature (CCT) mography sensor (PPG).  Accurate CIE 1931 XYZ (RGB) color measurement The light sensor can be configured as an ambient light sensor (LS)  Very stable spectral response over angle of light incidence to measure ambient light similar to the human eye experience or as an RGB color sensor (CS). The module has a fully integrated  Output resolution for CS: 13 to 20 bits biosensor for reflective photoplethysmography. With the approp- riate algorithm, it can determine the human heart rate, oxygen
Proximity Sensor Features
saturation (SpO2), respiration rate, and heart rate variability (a measure of stress). The OB1203 integrates light sources and  Integrated and trimmed LED source, driver, and photodetector drivers in a single optically optimized package.  Programmable, pulsed LED up to 250mA output current A major LS application for the device is in smart phones or other  High resolution (12 to 16 bits) 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 > 100 klx sunlight support the activation of touch screen displays or system functions.  Crosstalk cancelation (analog and digital) The sensor combines optical sensing features (CS, LS, PS) and bio-sensing functionality (PPG) without needing a visible optical opening. The unique implementation of the OB1203 enables SpO
Physical Characteristics
2 measurements behind ink that is IR transmissive, but visibly dark,  Highly reliable and industry-proven OSIP package with allowing for aesthetic industrial designs. integrated cover glass for hypoallergenic products
Biosensor Features
 Wide operation temperature range: -40°C to +85°C  Wide supply voltage range: 1.7V to 3.6V  SpO2 measurement behind visibly dark, IR-transmissive ink  Typical active current at minimum duty cycle:  Industry’s smallest optical biosensor module LS/CS: 110µA  Fully integrated and trimmed module, including two LEDs, PS: 90µA + LED current (typical: ~300µA average) 250mA maximum drive current, and photodetectors  Low standby current: 2µA typical  Output resolution of PPG: 16 to 18 bits  I2C interface capable of Standard Mode (100kHz) or Fast  Data stored in 18-bit-wide, 32-sample FIFO memory Mode (400kHz) communication; 1.8V to 3.3V logic compatible  Integrated averaging function for higher signal-to-noise ratio  Programmable level-based interrupt functions with upper and (SNR) and data rate reduction lower thresholds for extending battery life  Programmable measurement rate: up to 3200 samples per  Industry’s smallest package: 4.2  2  1.2 mm3 14-pin module second  High SNR
Typical Applications Ambient Light Sensor Features
 Mobile Devices: Wearables, Fitness and Accessories  Industrial: Lighting, Proximity, Worker Safety, Driver Assist  High lux accuracy over different light sources.  Absolute sensitivity: 0.06 lx to >150,000 lx
Application Circuit
VDD2 VDD1 LED_VDD  Output resolution LS: 13 to 20 bits Preliminary  Three LS gain modes: x1 to x6 VDD Rup LVDD
OB1203 IC
VDD  Highly linear output, 50Hz/60Hz light and fluorescent LED1 light flicker immunity SCL SCL LED1 SDA LED2 SDA LED2 INT INT Microcontroller
OB1203
CVDD
Module
CLED VSS AGND LGND GND © 2019 Integrated Device Technology, Inc. 1 January 10, 2019