ADPD103

Photometric Front End

Data Sheet
Rev. B
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Data Sheet Rev. B
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Overview

Features and Benefits

  • Multifunction photometric front end
  • Fully integrated AFE, ADC, LED drivers, and timing core
  • Usable in a broad range of optical measurement applications, including photoplethysmography
  • Enables best-in-class ambient light rejection capability without the need for photodiode optical filters
  • Three 8 mA to 250 mA LED drivers
  • Separate data registers for each LED//photodiode combination
  • 1 to 8 optical inputs
  • Flexible, multiple, short LED pulses per optical sample
  • 20-bit burst accumulator enabling 20 bits per sample period
  • See data sheet for additional features

    • Product Details

    The ADPD103 is a highly efficient photometric front end with an integrated 14-bit analog-to-digital converter (ADC) and a 20-bit burst accumulator that works in concert with flexible light emitting diode (LED) drivers. It is designed to stimulate an LED and measure the corresponding optical return signal. The data output and functional configuration occur over a 1.8 V I2C interface. The control circuitry includes flexible LED signaling and synchronous detection.


    The analog front end (AFE) features best-in-class rejection of signal offset and corruption due to modulated interference commonly caused by ambient light.


    Couple the ADPD103 with a low capacitance photodiode of <100 pF for optimal performance. The ADPD103 can be used with any LED.


    Aplications

    • Body worn health and fitness monitors, for example, heart rate monitoring
    • Clinical measurements, for example, SpO2
    • Industrial monitoring
    • Background light measurements

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    At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

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    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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    RE: ADPD144RI - SPO2 data read EXAMPLE
    7 week(s) ago in Optical Sensing
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    RE: What is the difference between the operating modes of the ADPD103?
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    The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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    Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.