AD7403BRIZ-RL7

ADCs/DACs - Special Purpose Overview

The AD7403BRIZ-RL7 is a 16-bit isolated Sigma-Delta modulator from Analog Devices, housed in a 16-lead wide-body SOIC package. It features on-chip digital isolation using iCoupler technology and an internal reference. The device accepts a differential analog input of ±250 mV (±320 mV full-scale) and converts it to a high-speed single-bit data stream with a maximum clock rate of 20 MHz. Key electrical specifications include a typical Signal-to-Noise Ratio (SNR) of 88 dB, an Effective Number of Bits (ENOB) of 14.2 bits, and a power dissipation of 297 mW at VDD1 = VDD2 = 5.5 V. It operates within a temperature range of -40°C to +125°C.

ADCs/DACs - Special Purpose Feature Summary

• Integrated digital isolation with >25 kV/µs common-mode transient immunity
• 16-bit resolution with guaranteed no missing codes
• On-board voltage reference and second-order Sigma-Delta modulation
• Wide-body SOIC-16 package for increased creepage distance

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 RL7 corresponds to reel packaging when sourcing. Confirm that the component meets the required insulation ratings, such as 5000 V rms per UL 1577, for the intended safety application. Ensure supply voltages are maintained within the specified ranges: VDD1 between 4.5 V and 5.5 V, and VDD2 between 3 V and 5.5 V.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7403BRIZ-RL7 for applications requiring high precision in galvanically isolated environments. The device is suitable where a 16-bit output at 78.1 kSPS is needed using a sinc3 filter. Consider the thermal derating curves if operating near the maximum case temperature limits defined by DIN V VDE V 0884-10 standards.

ADCs/DACs - Special Purpose Part Context

This part belongs to the AD7403 series of isolated Sigma-Delta modulators. The BRIZ suffix indicates the commercial temperature grade (-40°C to +125°C) and the wide-body SOIC-16 package. The RL7 suffix denotes tape and reel packaging. It serves as a replacement for traditional optocouplers in high-voltage measurement scenarios.

ADCs/DACs - Special Purpose Replacement Considerations

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