ADUM7702BRWZ-RL7

ADCs/DACs - Special Purpose Overview

The ADUM7702BRWZ-RL7 is a 16-bit, isolated Sigma-Delta modulator from Analog Devices. It converts analog signals into a high-speed single-bit data stream using iCoupler technology for on-chip digital isolation. The device operates with a VDD1 supply of 4.5 V to 5.5 V and accepts a pseudo-differential input range of ±50 mV (±64 mV full-scale). It features a typical SNR of 82 dB, an ENOB of 13 bits, and supports main clock frequencies from 5 MHz to 21 MHz. The serial interface operates on a 3 V to 5.5 V supply (VDD2), providing galvanic isolation with a rated dielectric voltage of 5700 Vrms.

ADCs/DACs - Special Purpose Feature Summary

• Integrated iCoupler digital isolator with 150 kV/µs minimum CMTI
• 16-bit resolution with no missing codes and ±0.99 LSB DNL
• Low offset drift of ±0.25 µV/°C for precision shunt monitoring
• Wide operating temperature range from −40°C to +125°C

ADCs/DACs - Special Purpose Applications

• Shunt current monitoring in high-voltage systems
• AC motor control drives
• Power and solar inverters
• Wind turbine inverters

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific package variant against project requirements, as the ADuM7702 family includes both 16-lead SOIC_W and 8-lead SOIC_IC options. Confirm that the ordering suffix corresponds to the desired reel quantity and tape configuration. Ensure compatibility with the target PCB footprint, particularly regarding creepage and clearance distances mandated by safety standards such as UL 1577 and IEC 62368-1.

ADCs/DACs - Special Purpose Selection Notes

Select this component when high common-mode transient immunity is required for GaN or SiC switching applications. The pseudo-differential input is optimized for direct connection to shunt resistors without additional signal conditioning. Designers must implement an external sinc3 digital filter to achieve the specified 16-bit output at 78.1 kSPS. Power supply decoupling with 10 µF and 100 nF capacitors is mandatory for both VDD1 and VDD2 pins to maintain stability.

ADCs/DACs - Special Purpose Part Context

This part belongs to the ADuM770x series of isolated Sigma-Delta modulators. It serves as a replacement for traditional analog-to-digital converters combined with discrete optoisolators. The device simplifies system design by integrating the modulator and isolation barrier on a single chip, reducing board space and improving reliability in industrial and automotive environments.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.