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ADPD103BCPZ Arkusz danych(PDF) 1 Page - Analog Devices |
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ADPD103BCPZ Arkusz danych(HTML) 1 Page - Analog Devices |
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1 / 53 page  Photometric Front End Data Sheet ADPD103 Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license isgranted by implication or otherwise under any patent or patent rightsof Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2015–2016 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES 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 On-board sample to sample accumulator, enabling up to 27 bits per data read Low power operation I2C interface and 1.8 V analog/digital core Flexible sampling frequency ranging from 0.122 Hz to 3.820 kHz FIFO data operation APPLICATIONS Body worn health and fitness monitors, for example, heart rate monitoring Clinical measurements, for example, SpO2 Industrial monitoring Background light measurements GENERAL DESCRIPTION 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. TheADPD103 can be used with any LED. |
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