ADPD144RI
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ADPD144RI

PPG Optical Sensor Module with Integrated Red/IR Emitters and AFE

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Part Details
Part Models 2
1ku List Price Starting From $4.71
Features
  • 2.8 mm × 5.0 mm module with integrated optical components
    • 660 nm LED, 880 nm 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, 8.5 mA to 370 mA 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
Additional Details
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The ADPD144RI is a highly integrated, photometric front end optimized for photoplethysmography (PPG) detection of blood oxygenation (SpO2) 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.

The module combines highly efficient, light emitting diode (LED) emitters and a sensitive 4-channel, deep diffusion photodiode (PD1 to PD4) with a custom application specific integrated circuit (ASIC) in a compact package that provides optical isolation between the integrated LED emitters and the detection photodiodes to improve through tissue, signal-tonoise ratio (SNR).

The ASIC consists of a 4-channel analog front end (AFE) with two independently configurable datapaths with separate gain and filter settings, a 14-bit analog-to-digital converter (ADC) with a burst accumulator, two flexible, independently configurable, LED drivers, and a digital control block. The digital control block provides AFE and LED timing, signal processing, and communication. Data output and functional configuration occur over a 1.8 V I2C interface.

Applications

  • Optical heart rate monitoring
  • Reflective SpO2 measurement

For additional ADI Healthcare Products and related information, please visit www.analog.com/healthcare.

Part Models 2
1ku List Price Starting From $4.71

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADPD144RI-ACEZ-RL
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  • HTML
ADPD144RI-ACEZ-RL7
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  • HTML
Evaluation Kit

Evaluation Kits 1

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EVAL-ADPD144RI

ADPD144RI Evaluation Board

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EVAL-ADPD144RI

ADPD144RI Evaluation Board

ADPD144RI Evaluation Board

Features and Benefits

  • Supports the detection of UART
  • UDP transfer capability
  • ADPD144RI full configuration
    • Register level
    • High level
  • Graph view
    • Time graph
    • Frequency graph

Product Detail

The EVAL-ADPD144RIZ-EB evaluation board provides users with a simple means of evaluating the ADPD144RI, a complete photometric system designed to measure optical signals from ambient light and from synchronous reflected light emitting diode (LED) pulses. The evaluation system includes the Applications WaveTool graphical user interface (GUI) that provides users with low level and high level configurability, real-time frequency and time domain analysis, and user datagram protocol (UDP) transfer capability so the evaluation board can easily interface to the user development system.

The EVAL-ADPD144RIZ-EB can interface with two different types of microcontroller boards, the EVAL-ADPDUCZ or the EVAL-ADPDM3Z microcontroller boards. Using the EVAL-ADPDUCZ requires a ribbon cable, this is obtained separately.

The design of the evaluation board is optimized for ear based photoplethysmography (PPG) measurements.

For additional information on the functionality of the ADPD144RI, refer to the ADPD144RI data sheet.

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