AD7401YRWZ-REEL

ADCs/DACs - Special Purpose Overview

The AD7401YRWZ-REEL is an isolated second-order Sigma-Delta modulator from Analog Devices, packaged in a 16-lead SOIC. It converts analog input signals into a high-speed 1-bit data stream using iCoupler digital isolation technology. The device operates on a 5 V supply for the analog side (VDD1) and supports 3 V or 5 V for the digital side (VDD2). It accepts differential inputs of ±200 mV with a full-scale range up to ±320 mV. Key electrical parameters include a maximum master clock frequency of 20 MHz, 16-bit resolution without missing codes, and a typical Signal-to-Noise Ratio (SNR) of 80 dB.

ADCs/DACs - Special Purpose Feature Summary

• Integrated iCoupler digital isolator providing reinforced insulation with UL, CSA, and VDE approvals.
• Second-order Sigma-Delta modulation architecture eliminating the need for external sample-and-hold circuits.
• On-chip voltage reference and low offset drift of 1 µV/°C typical.
• 16-lead SOIC package with operating temperature range from -40°C to +105°C.

ADCs/DACs - Special Purpose Applications

• AC motor control systems requiring isolated current sensing.
• Data acquisition systems needing galvanic isolation between analog front-ends and digital processors.
• Replacement for traditional A/D converter and opto-isolator combinations in industrial monitoring.

ADCs/DACs - Special Purpose Procurement Notes

Verify that the specific ordering suffix corresponds to the reel packaging format required for automated assembly processes. Confirm that the component version matches the Rev F datasheet specifications regarding insulation ratings and timing constraints before integration into safety-critical designs.

ADCs/DACs - Special Purpose Selection Notes

Select this component when high-speed isolation is required for continuous sampling applications. Ensure the driving circuit can supply the necessary charge to the internal switched-capacitor inputs within half the MCLKIN cycle. Verify that the downstream digital filter, such as a Sinc3 filter, is compatible with the 20 MHz maximum output data rate.

ADCs/DACs - Special Purpose Part Context

This part belongs to the AD7401 family of isolated Sigma-Delta modulators. It serves as the isolated interface between analog sensors and digital signal processors. An internal clock variant, the AD7400, is also available within the same product line for applications where an external master clock is not desired.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation. Designers should evaluate components based on matching isolation voltage ratings, pinout compatibility, and dynamic performance specifications such as SNR and bandwidth.