AD7405BRIZ-RL

ADCs/DACs - Special Purpose Overview

The AD7405BRIZ-RL is a 16-bit isolated Sigma-Delta modulator featuring an integrated digital isolator based on iCoupler technology. It converts differential analog signals into a high-speed single-bit LVDS data stream. The device operates with a main clock input of 5 MHz to 20 MHz and accepts a full-scale analog input range of ±320 mV, with specified performance at ±250 mV. It achieves a typical Signal-to-Noise Ratio (SNR) of 88 dB and an Effective Number of Bits (ENOB) of 14.2 bits at a data rate of 78.1 kSPS using a sinc3 filter. Power supplies are separated: VDD1 (4.5 V to 5.5 V) for the analog side and VDD2 (3 V to 5.5 V) for the digital LVDS interface.

ADCs/DACs - Special Purpose Feature Summary

• 16-bit resolution with no missing codes and 88 dB typical SNR
• Integrated on-chip digital isolation with >25 kV/µs common-mode transient immunity
• LVDS interface for robust clock input and data output
• On-board voltage reference and wide operating temperature range (-40°C to +125°C)

ADCs/DACs - Special Purpose Applications

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

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to ensure correct packaging configuration. Confirm that the component meets required safety certifications such as UL 1577 and IEC/CSA 62368-1 for the intended application environment. Check for any updates regarding insulation characteristics or regulatory approvals before finalizing procurement specifications.

ADCs/DACs - Special Purpose Selection Notes

Select this component when high-resolution isolation is required between analog sensing circuits and digital processing units. Ensure the external clock frequency falls within the 5 MHz to 20 MHz range to achieve the desired output data rate. Verify that the analog input signal amplitude remains within the ±250 mV specified performance range for optimal linearity and noise performance. Consider the power dissipation limits when designing thermal management for the SOIC-16 package.

ADCs/DACs - Special Purpose Part Context

The AD7405 belongs to the AD740x family of 16-bit isolated Sigma-Delta modulators from Analog Devices. These devices utilize monolithic transformer technology to provide galvanic isolation without the latency and degradation associated with traditional optocouplers. The BRIZ-RL designation indicates the specific package type (wide-body SOIC_IC) and reel packaging format used for surface-mount assembly.

ADCs/DACs - Special Purpose Replacement Considerations

When replacing the AD7405, verify that substitute components offer comparable isolation voltage ratings (≥5000 V rms) and similar dynamic performance metrics such as SNR and ENOB. Ensure the replacement supports the LVDS interface standard and compatible clock frequencies. Check for pin-out compatibility and thermal resistance characteristics to maintain system reliability.