ADUM7704BRWZ

ADCs/DACs - Special Purpose Overview

The ADUM7704BRWZ is a 16-bit, isolated Sigma-Delta modulator from Analog Devices. It converts analog signals into high-speed single-bit data streams using iCoupler technology for on-chip digital isolation. The device operates with an analog supply (VDD1) of 4.5 V to 20 V and accepts pseudo-differential inputs within ±64 mV full-scale range. Digital interfaces run on a 3 V to 5.5 V supply (VDD2). Key electrical parameters include a typical SNR of 82 dB, ENOB of 13 bits, and CMTI of 150 kV/µs. It is housed in a 16-lead wide-body SOIC package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated digital isolation based on iCoupler technology with 5700 Vrms insulation rating
• Second-order Sigma-Delta modulation supporting main clock frequencies from 5 MHz to 21 MHz
• High common-mode transient immunity (CMTI) of 150 kV/µs minimum
• Pseudo-differential analog input optimized for shunt voltage monitoring

ADCs/DACs - Special Purpose Applications

• Shunt current monitoring
• AC motor controls
• Power and solar inverters
• Wind turbine inverters

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix BRWZ corresponds to the 16-lead wide-body SOIC_W package variant. Confirm that the component meets the required safety certifications such as UL 1577 and IEC standards for the intended isolation barrier application. Check datasheet revisions for any updates to insulation characteristics or regulatory approvals before finalizing procurement specifications.

ADCs/DACs - Special Purpose Selection Notes

Select this component when galvanic isolation is required between high-voltage analog sensing circuits and low-voltage digital processing systems. Ensure the system design accommodates the 4.5 V to 20 V analog supply range and utilizes a sinc3 digital filter to reconstruct the 16-bit output at the desired sample rate. Verify that the PCB layout maintains the necessary creepage and clearance distances specified for the 16-lead package.

ADCs/DACs - Special Purpose Part Context

The ADUM7704 belongs to the ADuM770x family of isolated Sigma-Delta modulators. It serves as a direct replacement for traditional optocoupler-based ADC solutions, offering superior performance in terms of speed, power consumption, and reliability. The BRWZ designation specifically identifies the 16-lead wide-body SOIC package version designed for higher voltage isolation requirements.

ADCs/DACs - Special Purpose Replacement Considerations

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