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ADPD1081 Datasheet(PDF) 1 Page - Analog Devices |
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ADPD1081 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 74 page  Photometric Front Ends Data Sheet ADPD1080/ADPD1081 Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2018–2020 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 Enables ambient light rejection capability without the need for photodiode optical filters Three 370 mA LED peak current 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 2700 Hz FIFO data operation Qualified for automotive applications APPLICATIONS Wearable health and fitness monitors Clinical measurements, for example, SpO2 Industrial monitoring Background light measurements GENERAL DESCRIPTION The ADPD1080/ADPD1081 are highly efficient, photometric front ends, each with an integrated 14-bit analog-to-digital converter (ADC) and a 20-bit burst accumulator that works with flexible light emitting diode (LED) drivers. The ADPD1080/ ADPD1081 stimulate an LED and measures the corresponding optical return signal. The data output and functional configuration occur over a 1.8 V I2C interface on the ADPD1080 or a serial port interface (SPI) on the ADPD1081. The control circuitry includes flexible LED signaling and synchronous detection. The analog front end (AFE) features rejection of signal offset and corruption due to modulated interference commonly caused by ambient light without the need for optical filters or dc cancellation circuitry that requires external control. Couple the ADPD1080/ADPD1081 with a low capacitance photodiode of <100 pF for optimal performance. The ADPD1080/ ADPD1081 can be used with any LED. The ADPD1080 is available in a 16-ball, 2.46 mm × 1.4 mm WLCSP and a 28-lead, 4 mm × 4 mm LFCSP. The SPI only version, ADPD1081, is available in a 17-ball, 2.46 mm × 1.4 mm WLCSP. |
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