AD7401YRW

ADCs/DACs - Special Purpose Overview

The AD7401YRW is a 16-bit, second-order Sigma-Delta modulator featuring integrated digital isolation via iCoupler technology. It converts analog input signals into a high-speed single-bit data stream with a maximum clock rate of 20 MHz. The device operates on a 5 V supply, accepting ±250 mV differential inputs (full scale ±320 mV) without external sample-and-hold circuits. Key electrical parameters include a typical INL of ±2 LSB at 16 bits, offset drift of 1 μV/°C, and power consumption of 100 mW. It utilizes a serial interface powered by 5 V or 3.3 V and is housed in a 16-lead SOIC package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated digital isolation using iCoupler technology for superior performance over optocouplers
• Second-order Sigma-Delta modulation architecture with 16-bit resolution and no missing codes
• Built-in voltage reference source eliminating the need for external components
• Continuous sampling capability removing the requirement for external sample-and-hold circuits

ADCs/DACs - Special Purpose Applications

• AC motor control systems
• Shunt current monitoring in solar photovoltaic converters
• Data acquisition systems requiring galvanic isolation
• Replacement for traditional ADC and optocoupler solutions

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout compatibility and temperature range. The base model designation may correspond to various tape-and-reel or tube packaging options. Ensure the selected variant meets the required operating temperature range of -40°C to +125°C for industrial applications.

ADCs/DACs - Special Purpose Selection Notes

Select this component when high-resolution isolation is required for low-level signal measurement. The ±250 mV input range necessitates appropriate front-end amplification for higher current or voltage levels. Consider the 20 MHz maximum clock speed when designing the downstream digital filter, such as a sinc3 filter, to achieve the desired output data rate and noise performance.

ADCs/DACs - Special Purpose Part Context

The AD7401YRW belongs to the AD740x family of isolated Sigma-Delta modulators. This series integrates the modulator and digital isolator on a single chip, simplifying design compared to discrete solutions. The family includes variants like the AD7401A and AD7401YRWZ, which share core functional specifications but may differ in packaging or testing standards.

ADCs/DACs - Special Purpose Replacement Considerations

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