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ANALOG DEVICES INC. ADuM7702 16-bit Sigma-Delta Modulators | Featured Product Spotlight

December 31, 2020 by Mouser Electronics

This Featured Product Spotlight is part of a video series exploring the specifications, applications, and market context of new products.

ANALOG DEVICES INC. ADuM7702 16-bit Sigma-Delta Modulators

Analog Devices’ ADuM7702 16-bit Isolated Sigma-Delta modulator converts a pseudo differential analog input into an isolated high-speed single-bit data stream ideal for use in shunt current monitoring, AC motor controls, inverters, and other high voltage applications requiring galvanic isolation. 

The ADuM7702 is a high-performance 2nd-order sigma-delta modulator that accepts a pseudo-differential analog input.  It continuously samples and converts the input into a high-speed single-bit data stream, with a 5MHz to 21MHz sample rate determined by the master clock input from the digital side.  The IC features on-chip digital isolation for the clock input and the data output. This is based on ADI’s iCoupler monolithic transformer technology, which provides superior performance to alternatives such as optocouplers. 

The ADuM7702 has a ±64mV full-scale range.  With a 0V input, it produces an output of alternating 1s and 0s.  With a +50mV input, it produces an output stream that is high 89.06% of the time, and it +64mV it produces a stream of all 1s. For negative values, the output data stream is the opposite. 

In a typical application, the output data is fed into a sinc3 filter to recover the original analog input value, with a typical SNR of 82dB.  The device operates from a 4.5V to 5.5V analog supply and a 3V to 5.5V digital supply, and it’s housed in a 16-lead wide body SOIC or an 8-lead wide body SOIC with increased creepage.  For all the performance details and more information on Analog Devices’ ADuM7702 16-bit, isolated, sigma-delta modulator, visit

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