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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ADPD6000 데이터시트(PDF) 1 Page - Analog Devices |
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ADPD6000 데이터시트(HTML) 1 Page - Analog Devices |
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1 / 89 page  Data Sheet ADPD6000 Multimodal Sensor Front End Rev. 0 DOCUMENT FEEDBACK TECHNICAL SUPPORT Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other 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. Trademarks and registered trademarks are the property of their respective owners. FEATURES ► Optical channel ► 4 input channels with multiple operation modes for various sensor measurements ► Dual channel processing with simultaneous sampling ► 12 programmable time slots for synchronized sensor meas- urements ► Flexible input multiplexing to support single-ended sensor measurements ► 4 LED drivers, 2 of which can be driven simultaneously ► Flexible sampling rate from 0.004 Hz to 9 kHz using internal oscillators ► SNR of transmit and receive signal chain: 117 dB (with off-chip filtering) ► AC ambient light rejection: 78 dB up to 100 Hz ► 400 mA total LED peak drive current ► Individual ambient light rejection DAC at TIA input with 9-bit control up to 300 μA ► Individual LED dc cancellation DAC at TIA input with 7-bit control up to 190 μA ► ECG channel ► 0.75 μV rms RTI noise at diagnostic filter bandwidth (150 Hz) ► High input impedance: 3 GΩ ► Accepts up to 1.2 V of dc differential input range ► Common-mode rejection ratio: 116 dB ► Two-electrode and three-electrode configurations ► AC lead off detection and dc lead off detection ► BIA channel ► Low power, high accuracy excitation path ► Configurable output frequency up to 250 kHz ► Sine wave excitation with a 12-bit DAC ► High accuracy with large imbalance contact impedance ► Configurable receive filters with low noise design ► Complex impedance measurement engine ► Supports both external calibration and internal calibration ► SPI communications supported ► 640-byte FIFO APPLICATIONS ► Wearable health and fitness monitors: heart rate, heart rate variability, SpO2, body impedance analysis, hydration, cuffless noninvasive blood pressure ► Home patient monitoring ► Industrial monitoring: particle and aerosol, gas, and conductivity detection GENERAL DESCRIPTION The ADPD6000 is a highly integrated analog front end (AFE) designed for measuring various vital signals. The optical channel is designed as an optical transceiver, stimulat- ing up to four light emitting diodes (LEDs) and measuring the return signal on up to four separate current inputs. The signal chain rejects signal offsets and corruption from asynchronous modulated interference, typically from ambient light, eliminating the need for optical filters or externally controlled dc cancellation circuitry. The electrocardiography (ECG) signal acquisition is designed to support low noise, diagnostic level measurement in the presence of a variety of interferers. The ECG signal chain has a number of complementary features supporting ECG measurement, such as driven reference for common-mode rejection and lead off detection to identify a fallen electrode. The body impedance analysis (BIA) signal chain is designed for body impedance measurement with a configurable excitation path and measurement path. A 12-bit digital-to-analog (DAC) is used in the excitation path to generate the sinusoid wave and high precision measurement, with configurable filters used to measure the body response of the stimulus. The data output and functional configuration use a serial port inter- face (SPI) on the ADPD6000. The control circuitry includes flexible LED signaling and synchronous detection, digital filters, digital wave generators, and configurable filters. The ADPD6000 is available in a 2.6 mm × 2.6 mm, 0.4 mm pitch, 36-ball wafer level chip scale package (WLCSP). Analog Devices is in the process of updating documentation to provide terminology and language that is culturally appropriate. This is a process with a wide scope and will be phased in as quickly as possible. Thank you for your patience. |
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