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Analog Devices Inc. ADPD144RI PPG Optical Sensor Module

Analog Devices Inc. ADPD144RI PPG Optical Sensor Module is optimized for photoplethysmography (PPG) detection of blood oxygenation (SpO2). This is achieved by synchronous detection in red and infrared wavelengths. Synchronous measurement allows rejection of both DC and AC ambient light interference with extremely low power consumption.

Features

  • 2.8×5.0mm module with integrated optical components
    • 660nm LED, 880nm IR LED, and photodiode
  • Fully integrated AFE, ADC, LED drivers, and timing core
  • Custom optical package for use under a glass window
  • Programmable 2-channel, 8.5mA to 370mA LED drivers
  • Provision to use external LED emitters
  • Low power
  • Specifically designed for ultralow direct optical reflections
  • Independent AFE settings per channel
  • I2C data and control interface
  • Burst accumulator enabling 20 bits per sample period
  • Sample to sample accumulator enabling up to 27 bits per data read
  • 16-bit or 32-bit register or FIFO readout per channel

Applications

  • Optical heart rate monitoring
  • Reflective SpO2 measurement

FUNCTIONAL BLOCK DIAGRAM

Block Diagram - Analog Devices Inc. ADPD144RI PPG Optical Sensor Module

Additional Resource

How to Design A Better Pulse Oximeter

This article covers the fundamentals of SpO2 measurement and demonstrates how a new generation of optical analog front ends (AFEs) can help create a better oximeter.

Learn More

Publicado: 2019-04-17 | Actualizado: 2022-03-11