Data Sheet ADPD6000 Multimodal Sensor Front End FEATURES APPLICATIONS Optical channel Wearable health and fitness monitors: heart rate, heart rate variability, SpO2, body impedance analysis, hydration, cuffless 4 input channels with multiple operation modes for various noninvasive blood pressure sensor measurements Home patient monitoring Dual channel processing with simultaneous sampling Industrial monitoring: particle and aerosol, gas, and conductivity 12 programmable time slots for synchronized sensor meas- detection urements Flexible input multiplexing to support single-ended sensor GENERAL DESCRIPTION measurements 4 LED drivers, 2 of which can be driven simultaneously The ADPD6000 is a highly integrated analog front end (AFE) designed for measuring various vital signals. Flexible sampling rate from 0.004 Hz to 9 kHz using internal oscillators The optical channel is designed as an optical transceiver, stimulat- SNR of transmit and receive signal chain: 117 dB (with off-chip ing up to four light emitting diodes (LEDs) and measuring the filtering) return signal on up to four separate current inputs. The signal chain AC ambient light rejection: 78 dB up to 100 Hz rejects signal offsets and corruption from asynchronous modulated 400 mA total LED peak drive current interference, typically from ambient light, eliminating the need for optical filters or externally controlled dc cancellation circuitry. Individual ambient light rejection DAC at TIA input with 9-bit control up to 300 A The electrocardiography (ECG) signal acquisition is designed to Individual LED dc cancellation DAC at TIA input with 7-bit support low noise, diagnostic level measurement in the presence control up to 190 A of a variety of interferers. The ECG signal chain has a number ECG channel of complementary features supporting ECG measurement, such as 0.75 V rms RTI noise at diagnostic filter bandwidth (150 Hz) driven reference for common-mode rejection and lead off detection to identify a fallen electrode. High input impedance: 3 G Accepts up to 1.2 V of dc differential input range The body impedance analysis (BIA) signal chain is designed for Common-mode rejection ratio: 116 dB body impedance measurement with a configurable excitation path and measurement path. A 12-bit digital-to-analog (DAC) is used Two-electrode and three-electrode configurations in the excitation path to generate the sinusoid wave and high AC lead off detection and dc lead off detection precision measurement, with configurable filters used to measure BIA channel the body response of the stimulus. Low power, high accuracy excitation path The data output and functional configuration use a serial port inter- Configurable output frequency up to 250 kHz face (SPI) on the ADPD6000. The control circuitry includes flexible Sine wave excitation with a 12-bit DAC LED signaling and synchronous detection, digital filters, digital wave High accuracy with large imbalance contact impedance generators, and configurable filters. Configurable receive filters with low noise design The ADPD6000 is available in a 2.6 mm 2.6 mm, 0.4 mm pitch, Complex impedance measurement engine 36-ball wafer level chip scale package (WLCSP). Supports both external calibration and internal calibration SPI communications supported 640-byte FIFO 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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Trademarks and TECHNICAL SUPPORT registered trademarks are the property of their respective owners.Data Sheet ADPD6000 TABLE OF CONTENTS Features ............................................................... 1 ECG Signal Chain............................................ 18 Applications .......................................................... 1 BIA Signal Chain.............................................. 20 General Description...............................................1 FIFO................................................................. 21 Functional Block Diagram......................................3 Clocking............................................................23 Specifications........................................................ 4 Time Stamp Operation..................................... 23 Temperature and Power Specifications..............4 Execution Modes..............................................24 Performance Specifications................................4 Host Interface...................................................24 Digital Specifications.......................................... 7 Applications Information...................................... 27 Timing Specifications......................................... 7 Optical Path......................................................27 Absolute Maximum Ratings...................................9 ECG Path......................................................... 30 Thermal Resistance........................................... 9 BIA Path........................................................... 32 Electrostatic Discharge (ESD) Ratings...............9 Multimodal........................................................32 ESD Caution.......................................................9 Design Guide....................................................35 Pin Configuration and Function Descriptions...... 10 Register Summary...............................................36 Typical Performance Characteristics...................12 Register Details................................................... 65 Theory of Operation.............................................16 Outline Dimensions............................................. 89 Introduction.......................................................16 Ordering Guide.................................................89 Time Slot Operation......................................... 16 Evaluation Boards............................................ 89 Optical Signal Chain.........................................17 REVISION HISTORY 4/2022Revision 0: Initial Version analog.com Rev. 0 2 of 89