ADUM7704BRWZ-RL7

ADCs/DACs - Special Purpose Overview

The ADUM7704BRWZ-RL7 is a 16-bit, isolated Sigma-Delta modulator from Analog Devices. It converts analog input 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 ±50 mV (±64 mV full-scale). Digital interfaces run on a 3 V to 5.5 V supply (VDD2). Key electrical parameters include a maximum main clock frequency of 21 MHz, typical SNR of 82 dB at 78.1 kSPS, and power dissipation up to 216.5 mW.

ADCs/DACs - Special Purpose Feature Summary

• On-chip digital isolation based on iCoupler technology with CMTI of 150 kV/µs minimum.
• Second-order Sigma-Delta modulation providing 16-bit resolution with no missing codes.
• Wide analog input range of ±64 mV full-scale with low offset drift of ±0.25 µV/°C.
• Comprehensive safety approvals including UL 1577 (5700 Vrms), IEC 62368-1, and VDE 0884-17.

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 upon ordering, as the ADUM7704 family includes both 16-lead SOIC_W and 8-lead SOIC_IC packages with different thermal and creepage characteristics. Confirm that the required insulation ratings align with the selected package's regulatory certifications. Ensure the design accounts for the distinct pin configurations between the two form factors.

ADCs/DACs - Special Purpose Selection Notes

Select the 16-lead SOIC_W package for applications requiring operation up to +125°C and higher creepage distances. Choose the 8-lead SOIC_IC package if space constraints are critical or if operation up to +105°C is sufficient. Verify that the external digital filter matches the recommended sinc3 architecture to achieve specified ENOB and noise performance.

ADCs/DACs - Special Purpose Part Context

This component belongs to the ADuM7704 series of isolated Sigma-Delta modulators. It is designed to replace traditional optocoupler and ADC combinations by integrating the modulator and digital isolator into a single chip. The BRWZ suffix indicates the wide-body SOIC_W package variant.

ADCs/DACs - Special Purpose Replacement Considerations

Direct replacements must support isolated Sigma-Delta modulation with comparable CMTI and voltage ratings. Components like the ADUM7703 or ADUM7701 offer similar functionality but differ in input ranges and integrated LDO features. Cross-reference insulation specifications carefully when substituting packages.