AD7401YRWZ

ADCs/DACs - Special Purpose Overview

The AD7401YRWZ is a second-order Sigma-Delta modulator featuring on-chip digital isolation based on iCoupler technology. It converts analog input signals into a high-speed 1-bit data stream with a maximum clock rate of 20 MHz. The device operates from a 5 V supply (VDD1) and accepts differential inputs of ±200 mV, with a full-scale range up to ±320 mV. It includes an internal reference and requires no external sample-and-hold circuitry. The serial interface supports 3 V or 5 V logic (VDD2). Key electrical parameters include 16-bit resolution without missing codes, ±2 LSB typical INL, and 80 dB SNR. It is housed in a 16-lead SOIC package.

ADCs/DACs - Special Purpose Feature Summary

• On-chip digital isolation using iCoupler technology
• Second-order Sigma-Delta modulation with 20 MHz max clock rate
• Internal voltage reference and 16-bit resolution
• Differential analog input range of ±200 mV

ADCs/DACs - Special Purpose Applications

• AC motor controls
• Data acquisition systems
• A/D and opto-isolator replacements
• Current sensing applications

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix YRWZ corresponds to the tape and reel packaging variant when sourcing. Confirm that the component meets UL 1577 and VDE certification requirements for reinforced insulation if safety isolation is critical to the design. Check for humidity sensitivity handling instructions during storage and assembly.

ADCs/DACs - Special Purpose Selection Notes

Select this component when galvanic isolation between the analog front-end and digital processing side is required. Ensure the system can accommodate separate power domains: 4.5 V to 5.25 V for the isolated analog side (VDD1) and 3 V to 5.5 V for the digital side (VDD2). Verify that the downstream digital filter can process the 1-bit stream at the selected master clock frequency up to 20 MHz.

ADCs/DACs - Special Purpose Part Context

The AD7401YRWZ belongs to the AD7401 family of isolated Sigma-Delta modulators. It serves as a direct replacement for traditional solutions combining discrete ADCs and optocouplers. An internal clock version, the AD7400, is also available within the same product line for designs not requiring an external master clock.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.