AD7400AYRWZ-RL

ADCs/DACs - Special Purpose Overview

The AD7400AYRWZ-RL is a second-order Sigma-Delta modulator featuring on-chip digital isolation. It converts analog input signals into a high-speed 1-bit data stream at a typical clock rate of 10 MHz. The device operates from a single 5 V supply (VDD1: 4.5 V to 5.5 V) and accepts a differential analog input range of ±250 mV, with a full-scale range of ±320 mV. It provides 16-bit resolution with no missing codes and includes an integrated reference. The serial I/O side (VDD2) supports 3 V to 5.5 V logic levels.

ADCs/DACs - Special Purpose Feature Summary

• Second-order Sigma-Delta modulation with 10 MHz internal clock output
• Integrated iCoupler digital isolator rated for 5000 Vrms isolation voltage
• 16-bit resolution with guaranteed no missing codes and ±2 LSB typical INL
• On-chip voltage reference and low offset drift of 1.5 µV/°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 specific suffix RL indicates reel packaging when sourcing. Confirm that the Y version corresponds to the standard specifications listed in the datasheet. Ensure compatibility with the required insulation standards such as UL 1577 or DIN EN IEC 60747-17 if safety certification is mandatory for the final application.

ADCs/DACs - Special Purpose Selection Notes

Select this component for applications requiring high common-mode transient immunity exceeding 25 kV/µs. It is suitable for replacing traditional optocouplers where higher bandwidth and lower power consumption are needed. Ensure the external digital filter matches the Sinc3 recommendation for optimal SNR performance at the desired throughput rate.

ADCs/DACs - Special Purpose Part Context

This part belongs to the AD7400A family of isolated Sigma-Delta modulators. It is functionally similar to the AD7401A but differs in clock configuration requirements. The device is designed to interface directly with microcontrollers or FPGAs via its serial interface, eliminating the need for external sample-and-hold circuits.

ADCs/DACs - Special Purpose Replacement Considerations

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

ADCs/DACs - Special Purpose FAQ

What is the maximum analog input voltage range?

The specified input range is ±250 mV, while the absolute full-scale range extends to ±320 mV.

How is the digital isolation implemented?

The AD7400A uses Analog Devices' iCoupler technology, which combines high-speed CMOS with monolithic air core transformer technology for on-chip digital isolation.

What is the recommended digital filter type?

A Sinc3 filter is recommended to reconstruct the original information from the 1-bit data stream, typically implemented in an FPGA or DSP.