ADPD106
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ADPD106

Photometric Front End with One Input and SPI

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Part Details
Part Models 1
1ku List Price
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Features
  • Multifunction photometric front end
  • Fully integrated AFE, ADC, LED drivers, and timing core
  • Enables best-in-class ambient light rejection capability without the need for photodiode optical filters
  • Three 370 mA LED drivers
  • Flexible, multiple, short LED pulses per optical sample
  • 20-bit burst accumulator enabling 20 bits per sample period
  • On-board sample to sample accumulator, enabling up to 27 bits per data read
  • Low power operation
  • SPI, I2C interface, and 1.8 V analog/digital core
  • Flexible sampling frequency ranging from 0.122 Hz to 3820 Hz
  • FIFO data operation
Additional Details
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The ADPD105/ADPD106/ADPD107 are highly efficient, photometric front ends, each with an integrated 14-bit analogto-digital converter (ADC) and a 20-bit burst accumulator that works with flexible light emitting diode (LED) drivers. The accumulator 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 on the ADPD105 or SPI on the ADPD106 and ADPD107. 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 ADPD105/ADPD106/ADPD107 with a low capacitance photodiode of <100 pF for optimal performance. The ADPD105/ADPD106/ADPD107 can be used with any LED. The ADPD105 is available in a 2.46 mm × 1.4 mm WLCSP and a 4 mm × 4 mm LFCSP. The SPI only versions, ADPD106 and ADPD107, are available in a 2.46 mm × 1.4 mm WLCSP.

Applications

  • Wearable health and fitness monitors
  • Clinical measurements, for example, SpO2
  • Industrial monitoring
  • Background light measurements
Part Models 1
1ku List Price
price unavailable

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADPD106BCBZR7
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Software and Part Ecosystem

Software and Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

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EVAL-ADPD105

ADPD105 Evaluation Board

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EVAL-ADPD105

ADPD105 Evaluation Board

ADPD105 Evaluation Board

Features and Benefits

  • Supports the detection of UART
  • UDP transfer capability
  • ADPD105 full configuration
    • Register level
    • Parameter level
  • Graph view
    • Time graph
    • Frequency graph

Product Detail

The EVAL-ADPD105Z-GEN evaluation board provides the user with a simple means of connecting their own optics to the ADPD105 photometric front end to evaluate the ADPD105 in a number of different applications, from vital signs monitoring to industrial sensing. The evaluation board includes the OpenMarket WaveTool graphical user interface (GUI) that provides the user with low level and high level configurability, real-time frequency and time domain analysis, and User Datagram Protocol (UDP) transfer capability so that the evaluation board can easily interface to the user’s development system.


The USB port powers the EVAL-ADPD105Z-GEN. On-board voltage regulators provide voltage supplies for the ADPD105, ADuCM360, and FTDI Chip FT232. There are on-board regulators that provide 3.3 V and 4.3 V LED supplies, as well as a selectable option to add an external LED supply. The evaluation board provides an LED and photodiode (PD) for a finger photo-plethysmography (PPG) measurement that is useful for a quick functionality check of the evaluation system.


The schematic and board layout, as well as the board itself, indicate signal names for easy identification. For additional information on the functionality of the ADPD105, refer to the ADPD105 datasheet.

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