AD7403TRIZ-EP

ADCs/DACs - Special Purpose Overview

The AD7403TRIZ-EP is an enhanced product, 16-bit isolated Sigma-Delta modulator designed for defense and aerospace applications. It features on-chip digital isolation using iCoupler technology and operates within a military temperature range of −55°C to +125°C. The device accepts a differential analog input of ±250 mV (±320 mV full-scale) and converts it into a high-speed single-bit data stream with a clock rate of 5 MHz to 16 MHz. Key electrical specifications include a typical signal-to-noise ratio (SNR) of 88 dB at 78.1 kSPS, an effective number of bits (ENOB) of 14.2 bits, and a common-mode transient immunity exceeding 25 kV/µs. It is housed in a 16-lead wide-body SOIC package.

ADCs/DACs - Special Purpose Feature Summary

• Military temperature range operation from −55°C to +125°C
• On-chip digital isolator with >25 kV/µs common-mode transient immunity
• 16-bit resolution with no missing codes and 88 dB typical SNR
• Controlled manufacturing baseline with one assembly/test site and one fabrication site

ADCs/DACs - Special Purpose Applications

• Shunt current monitoring
• AC motor controls
• Power and solar inverters
• Wind turbine inverters
• Data acquisition systems

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix requirements for tape-and-reel packaging versus tube quantities when sourcing this component. Confirm that the procurement channel supports the Enhanced Product (EP) designation, which implies controlled manufacturing baselines and qualification data availability upon request. Ensure compliance with the specified RoHS compliant status indicated by the 'Z' suffix in the part number.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7403TRIZ-EP for applications requiring strict environmental reliability and galvanic isolation in harsh conditions. The device requires an external master clock between 5 MHz and 16 MHz and a sinc3 digital filter to achieve optimal performance. Ensure the system design accommodates the dual power supply requirements: VDD1 (4.5 V to 5.5 V) for the isolated side and VDD2 (3 V to 5.5 V) for the serial interface. Verify that the PCB layout maintains the minimum creepage and clearance distances specified for the wide-body SOIC package.

ADCs/DACs - Special Purpose Part Context

The AD7403TRIZ-EP belongs to the AD7403 family of isolated Sigma-Delta modulators but is distinguished by its Enhanced Product (EP) status. This variant is specifically qualified for defense and aerospace environments under the AQEC standard. Unlike commercial versions, it guarantees a controlled manufacturing baseline with single-source fabrication and assembly sites, providing enhanced traceability and stability for critical mission-critical systems.

ADCs/DACs - Special Purpose Replacement Considerations

Direct replacements must match the military temperature range and EP manufacturing controls. Standard AD7403 variants may not meet the -55°C lower limit or the controlled baseline requirements. Verify pin compatibility with the RI-16-2 package and ensure the replacement supports the required 5000 Vrms isolation voltage per UL 1577.