AD7400AYNSZ

ADCs/DACs - Special Purpose Overview

The AD7400AYNSZ is a second-order Sigma-Delta modulator featuring integrated digital isolation based on iCoupler technology. It converts analog signals into a high-speed 1-bit data stream at a typical clock rate of 10 MHz. The device provides 16-bit resolution with no missing codes and operates from a single 5 V supply (VDD1: 4.5 V to 5.5 V) while supporting 3 V or 5 V logic levels on the isolated side (VDD2). Key electrical specifications include a ±250 mV analog input range, typical offset drift of 1.5 µV/°C, and power consumption of 15.5 mA at 5.5 V. It is housed in a 16-lead SOIC package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated iCoupler digital isolator providing 5000 V rms isolation voltage for 1 minute
• Second-order Sigma-Delta modulation with 10 MHz clock rate and 16-bit resolution
• On-chip reference and low power operation (15.5 mA typical at 5.5 V)
• Operating temperature range from −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 component authenticity through authorized Analog Devices distributors or certified partners. Confirm that the ordering suffix matches the specific package and temperature grade requirements. Ensure compliance with RoHS directives and relevant safety certifications such as UL 1577 and IEC 62368-1 before integration into final designs.

ADCs/DACs - Special Purpose Selection Notes

Select this component when high-density isolation is required without external isolators. The internal reference simplifies design by reducing external component count. Ensure the application can accommodate the 10 MHz output data rate and implement an appropriate digital filter, such as a Sinc3 filter, to reconstruct the 16-bit word from the serial bitstream.

ADCs/DACs - Special Purpose Part Context

The AD7400A series replaces traditional optocouplers in isolation applications. The 'Y' suffix denotes the specific package variant within the 16-lead SOIC family. This model integrates the modulator, isolation barrier, and reference, offering superior performance characteristics compared to discrete solutions or standard optocouplers in terms of speed and reliability.

ADCs/DACs - Special Purpose Replacement Considerations

The AD7401A is an alternative version within the same family that requires an external clock source instead of using the internal oscillator. Designers should verify pin compatibility and timing specifications when substituting between these variants.