AD7403-8BRIZ-RL7

ADCs/DACs - Special Purpose Overview

The AD7403-8BRIZ-RL7 is a 16-bit isolated Sigma-Delta modulator from Analog Devices, packaged in an 8-lead wide-body SOIC. It converts analog signals into a high-speed single-bit data stream using on-chip iCoupler digital isolation. The device operates with a 5V analog supply (VDD1) and a 3V to 5.5V digital supply (VDD2). It accepts differential inputs of ±250mV for specified performance, with a full-scale range of ±320mV. Key electrical parameters include a typical SNR of 88dB at 78.1kSPS, an ENOB of 14.2 bits, and an operating temperature range of -40°C to +105°C.

ADCs/DACs - Special Purpose Feature Summary

• Integrated iCoupler digital isolator providing >25 kV/µs common-mode transient immunity
• 16-bit resolution with guaranteed no missing codes and 88 dB typical SNR
• On-board voltage reference and slew rate limited output for low EMI
• Safety approvals including UL 1577, CSA, and VDE certification

ADCs/DACs - Special Purpose Applications

• Shunt current monitoring in high-voltage systems
• AC motor controls and drive inverters
• Power and solar inverters
• Wind turbine inverters
• Data acquisition systems requiring galvanic isolation

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix RL7 indicates reel packaging when sourcing this component. Confirm that the AD7403-8 variant meets the required thermal constraints, as it is rated for an operating temperature range up to +105°C compared to the standard AD7403's +125°C limit. Ensure compatibility with the 8-lead wide-body SOIC footprint during PCB layout.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7403-8BRIZ-RL7 when space constraints require an 8-lead package instead of the 16-lead version. This model is suitable for applications where the maximum operating temperature does not exceed +105°C. Designers must account for the slightly higher offset drift (2 µV/°C typical) compared to the 16-lead variant. Ensure the external clock frequency is between 5 MHz and 20 MHz for optimal performance.

ADCs/DACs - Special Purpose Part Context

This part belongs to the AD7403 family of isolated Sigma-Delta modulators. The AD7403-8 variant specifically utilizes an 8-lead wide-body SOIC package, distinguishing it from the 16-lead AD7403. Both variants share identical core modulation and isolation technologies but differ in pin count and thermal operating limits.

ADCs/DACs - Special Purpose Replacement Considerations

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