16-Bit, Isolated, Sigma-Delta ADC Data Sheet ADuM7703 FEATURES FUNCTIONAL BLOCK DIAGRAM V V DD1 DD2 5 MHz to 21 MHz master clock input frequency Offset drift vs. temperature: 0.6 V/C maximum ADuM7703 SNR: 86 dB typical LDO CLK CLK MCLKIN 16 bits, no missing codes DECODER ENCODER Full-scale analog input voltage range: 320 mV ENOB: 14 bits typical V IN+ DATA DATA GAIN I : 10 mA maximum - ADC DD1 MDAT V ENCODER DECODER IN On-board digital isolator Operating temperature range 40C to +125C (16-lead SOIC W) GND GND 1 2 40C to +105C (8-lead SOIC IC) Figure 1. 20 V operation on V DD1 High CMTI: 150 kV/s minimum, V = 3.3 V DD2 Wide-body SOICs 16-lead SOIC W 8-lead SOIC IC with increased creepage Safety and regulatory approvals UL recognition 5700 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice 5A (Pending) VDE Certificate of Conformity DIN V VDE V 0884-10: V = 1270 V IORM PEAK DIN V VDE V 0884-11: V = 1060 V (Pending) IORM PEAK APPLICATIONS Shunt current monitoring AC motor controls Power and solar inverters Wind turbine inverters Analog-to-digital and optoisolator replacement GENERAL DESCRIPTION The ADuM7703 is a high performance, second-order, - analog- achieve an 86 dB signal-to-noise ratio (SNR) at 78.1 kSPS with a to-digital converter (ADC) with an integrated low dropout 256 decimation rate and a 20 MHz master clock. The serial (LDO) regulator that converts an analog input signal into a high input and output operates from a 5 V or a 3.3 V supply (VDD2). speed, single-bit data stream with on-chip digital isolation The serial interface is digitally isolated. High speed complementary based on Analog Devices, Inc., iCoupler technology. The metal-oxide semiconductor (CMOS) technology, combined with device operates from a 4.5 V to 20 V power supply range (V ) DD1 monolithic transformer technology, results in the on-chip isolation and accepts a pseudo differential input signal of 250 mV providing outstanding performance characteristics, superior to (320 mV full-scale). The pseudo differential input is ideally alternatives such as optocoupler devices. The ADuM7703 device suited to shunt voltage monitoring in high voltage applications is available in a 16-lead, wide-body SOIC with an operating where galvanic isolation is required. temperature range of 40C to +125C and an 8-lead, wide-body The analog input is continuously sampled by a high performance SOIC with an operating temperature range of 40C to +105C. analog modulator and converted to a ones density digital output stream with a data rate of up to 21 MHz. The original information can be reconstructed with an appropriate sinc3 digital filter to 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 2019 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. 20358-001ADuM7703 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ........................................... 11 Applications ....................................................................................... 1 Terminology .................................................................................... 14 Functional Block Diagram .............................................................. 1 Theory of Operation ...................................................................... 16 General Description ......................................................................... 1 Circuit Information .................................................................... 16 Revision History ............................................................................... 2 Analog Input ............................................................................... 16 Specif icat ions ..................................................................................... 3 Applications Information .............................................................. 18 Timing Specifications .................................................................. 4 Current Sensing Applications ................................................... 18 Package Characteristics ............................................................... 5 Voltage Sensing Applications .................................................... 18 Insulation and Safety Related Specifications ............................ 5 Input Filter ................................................................................... 18 Regulatory Information (Pending) ............................................ 5 Digital Filter ................................................................................ 19 DIN V VDE V 0884-10 Insulation Characteristics ...................... 6 Interfacing to ADSP-CM4xx .................................................... 20 DIN V VDE V 0884-11 Insulation Characteristics (Pending) .... 7 Grounding and Layout .............................................................. 20 Absolute Maximum Ratings ............................................................ 8 Insulation Lifetime ..................................................................... 20 Thermal Resistance ...................................................................... 8 Outline Dimensions ....................................................................... 21 ESD Caution .................................................................................. 8 Ordering Guide .......................................................................... 22 Insulation Ratings ......................................................................... 8 Pin Configurations and Function Descriptions ........................... 9 REVISION HISTORY 7/2019Rev. 0 to Rev. A Changes to Figure 1 .......................................................................... 1 Changes to Figure 25 ...................................................................... 16 Updated Outline Dimensions ....................................................... 21 6/2019Revision 0: Initial Version Rev. A Page 2 of 22