8-Channel DAS with 16-Bit, 800 kSPS Bipolar Input, Simultaneous Sampling ADC Data Sheet AD7606B FEATURES APPLICATIONS 16-bit ADC with 800 kSPS on all channels Power line monitoring Input buffer with 5 M analog input impedance Protective relays Pin to pin compatible with the AD7606 Multiphase motor control 1 ppm/C typical positive and negative full-scale error drift Instrumentation and control systems 40C to +125C operating temperature range Data acquisition systems Single 5 V analog supply and 1.71 V to 3.6 V V supply DRIVE COMPANION PRODUCTS 21 V input clamp protection with 8 kV ESD Voltage References: ADR4525, LT6657, LTC6655 Extra modes available in software mode Digital Isolators: ADuM142E, ADuM6422A, ADuM5020, Per channel selectable analog input ranges ADuM5028 Single-ended, bipolar: 10 V, 5 V, and 2.5 V AD7606x Family Software Model Per channel system phase, offset, and gain calibration Additional companion products on the AD7606B product page Analog input open circuit detection feature 22 LSB (typical) open circuit code error (R = 10 k) PD Self diagnostics and monitoring features CRC error checking on read/write data and registers FUNCTIONAL BLOCK DIAGRAM 5V 5V 1.71V TO 3.6V 100nF 100nF 100nF 1F 1F AV AV V REGCAP REGCAP DRIVE CC CC ALDO DLDO 5M V1 CLAMP CONVST CLK OSC PGA 5M SAR V1GND RESET CLAMP LPF RANGE CONTROL INPUTS OS0 TO OS2 5M V8 BUSY CLAMP PROGRAMMABLE 5M PGA SAR FRSTDATA V8GND DIGITAL FILTER LPF CLAMP 1 OPTIONAL SERIAL D A TO D D OUT OUT RC FILTER ADC, PGA, AND 2 SDI CHANNEL REFCAPA 3 SCLK CONFIGURATION PARALLEL/ 10F + CS SERIAL INTERFACE 1 OPTIONAL EXTERNAL GAIN, OFFSET PARALLEL DB0 TO DB15 REFCAPB REFERENCE AND PHASE AV 3 CC RD INTERNAL CALIBRATION REFIN/REFOUT +2.5V REFERENCE WR V V IN OUT + 100nF 2.5V DIAGNOSTICS PAR/SER SEL 1F 0.1F ADR4525 REF AND SENSOR DISCONNECT REF SELECT GND REFGND AD7606B AGND 1 D A TO D D ARE SINGLE FUNCTIONS OF MULTIFUNCTION PINS, DB7/D A TO DB10/D D. OUT OUT OUT OUT 2 SDI IS A SINGLE FUNCTION OF THE DB11/SDI MULTIFUNCTION PIN. 3 RD AND SCLK ARE SINGLE FUNCTIONS OF THE RD/SCLK MULTIFUNCTION PIN. Figure 1. Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20192021 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 26071-001AD7606B Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 System Calibration Features .......................................................... 31 Applications ....................................................................................... 1 System Phase Calibration .......................................................... 31 Companion Products ....................................................................... 1 System Gain Calibration............................................................ 31 Functional Block Diagram .............................................................. 1 System Offset Calibration ......................................................... 32 Revision History ............................................................................... 3 Analog Input Open Circuit Detection .................................... 32 General Description ......................................................................... 4 Digital Interface .............................................................................. 34 Specifications ..................................................................................... 5 Hardware Mode .......................................................................... 34 Timing Specifications .................................................................. 8 Software Mode ............................................................................ 34 Absolute Maximum Ratings .......................................................... 12 Parallel Interface ......................................................................... 34 Thermal Resistance .................................................................... 12 Serial Interface ............................................................................ 37 Electrostatic Discharge (ESD) Ratings .................................... 12 Diagnostics ...................................................................................... 41 ESD Caution ................................................................................ 12 Reset Detection ........................................................................... 41 Pin Configuration and Function Descriptions ........................... 13 Overvoltage and Undervoltage Events .................................... 41 Typical Performance Characteristics ........................................... 16 Digital Error ................................................................................ 41 Terminology .................................................................................... 22 Diagnostics Multiplexer ............................................................ 44 Theory of Operation ...................................................................... 24 Typical Connection Diagram ....................................................... 46 Analog Front End ....................................................................... 24 Applications Information .............................................................. 48 SAR ADC ..................................................................................... 25 Layout Guidelines....................................................................... 49 Reference ..................................................................................... 26 Register Summary .......................................................................... 51 Operation Modes ........................................................................ 26 Register Details ............................................................................... 53 Digital Filter .................................................................................... 29 Outline Dimensions ....................................................................... 72 Padding Oversampling .............................................................. 30 Ordering Guide .......................................................................... 72 External Oversampling Clock ................................................... 30 Rev. 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