AD7401AYRWZ-RL

ADCs/DACs - Special Purpose Overview

The AD7401AYRWZ-RL 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 accepts a pseudo-differential input range of ±250 mV (±320 mV full scale) and operates from a 5 V supply (VDD1) with a 3 V to 5.5 V logic supply (VDD2). Key static performance metrics include 16-bit resolution with no missing codes, typical integral nonlinearity (INL) of ±2 LSB, and offset drift of 1 µV/°C. Dynamic specifications show a signal-to-noise ratio (SNR) of 83 dB and power dissipation of 93.5 mW at 5.5 V supplies.

ADCs/DACs - Special Purpose Feature Summary

• Integrated digital isolation using iCoupler technology with 5000 Vrms isolation voltage
• Second-order Sigma-Delta modulation with 20 MHz maximum external clock rate
• On-chip voltage reference and continuous sampling eliminating external sample-and-hold circuits
• 16-lead SOIC package with operating temperature range of -40°C to +125°C

ADCs/DACs - Special Purpose Applications

• AC motor controls
• Shunt current monitoring
• Data acquisition systems
• Analog-to-digital and opto-isolator replacements

ADCs/DACs - Special Purpose Procurement Notes

Verify the 'Y' suffix designation in the part number against the manufacturer's ordering guide to confirm specific manufacturing lot or revision details. Confirm that the reel packaging format aligns with automated assembly requirements. Ensure compatibility with the EVAL-AD7401AEDZ evaluation board for initial performance validation before final integration.

ADCs/DACs - Special Purpose Selection Notes

Select this component when high-voltage isolation is required between analog sensing circuits and digital processing units. The internal reference simplifies design by removing external precision voltage sources. Consider the 20 MHz clock limit and the need for an external sinc3 digital filter to reconstruct the 16-bit output word. Ensure the driving amplifier can handle the switched-capacitor input current spikes.

ADCs/DACs - Special Purpose Part Context

This part belongs to the AD7401A family of isolated Sigma-Delta modulators manufactured by Analog Devices Inc. The AD7401A variant specifically requires an external clock source, whereas the internal clock version is designated as AD7400A. The 'RL' suffix indicates tape and reel packaging for surface-mount assembly.

ADCs/DACs - Special Purpose Replacement Considerations

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