16-Bit, Isolated, Sigma-Delta Modulator Data Sheet ADuM7701 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 ADuM7701 SNR: 86 dB typical 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 IDD1: 10 mA maximum GAIN - ADC MDAT V ENCODER DECODER IN On-board digital isolator Operating temperature range: 40C to +125C High common-mode transient immunity: 150 kV/s minimum, GND GND 1 2 VDD2 = 3.3 V Figure 1. Wide-body SOICs 16-lead SOIC W 8-lead SOIC IC with increased creepage Safety and regulatory approvals (pending) UL recognition 5700 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice 5A VDE Certificate of Conformity DIN V VDE V 0884-10: VIORM = 1270 VPEAK DIN V VDE V 0884-11: VIORM = 1060 VPEAK APPLICATIONS Shunt current monitoring AC motor controls Power and solar inverters Wind turbine inverters Analog-to-digital and optoisolator replacement GENERAL DESCRIPTION The ADuM7701 is a high performance, second-order, - can be reconstructed with an appropriate sinc3 digital filter to modulator that converts an analog input signal into a high achieve an 86 dB signal-to-noise ratio (SNR) at 78.1 kSPS with a 256 decimation rate and a 20 MHz master clock. The serial speed, single-bit data stream, with on-chip digital isolation based on Analog Devices, Inc., iCoupler technology. The input and output operates from a 5 V or a 3 V supply (V ). DD2 device operates from a 4.5 V to 5.5 V power supply range The serial interface is digitally isolated. High speed complementary (V ) and accepts a pseudo differential input signal of DD1 metal-oxide semiconductor (CMOS) technology, combined with 250 mV (320 mV full-scale). The pseudo differential input monolithic transformer technology, results in the on-chip is ideally suited to shunt voltage monitoring in high voltage isolation providing outstanding performance characteristics, applications where galvanic isolation is required. superior to alternatives such as optocoupler devices. The The analog input is continuously sampled by a high performance ADuM7701 device is available in both a 16-lead and an 8-lead analog modulator and converted to a ones density digital output wide-body SOIC and has an operating temperature range of stream with a data rate of up to 21 MHz. The original information 40C to +125C. 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Technical Support www.analog.com 16234-001ADuM7701 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 Specifications ..................................................................................... 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 (Pending) .... 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 3/2019Revision 0: Initial Version Rev. 0 Page 2 of 22