ADUM7702-8BRIZ-RL

ADCs/DACs - Special Purpose Overview

The ADUM7702-8BRIZ-RL is a 16-bit, isolated Sigma-Delta modulator from Analog Devices. It features an on-chip digital isolator based on iCoupler technology, providing galvanic isolation between the analog input and digital output. The device accepts a pseudo-differential analog input signal with a full-scale range of ±64 mV (specified performance at ±50 mV). It operates from a 4.5 V to 5.5 V supply for the analog side (VDD1) and a 3 V to 5.5 V supply for the digital side (VDD2). The modulator converts the analog signal into a high-speed single-bit data stream with a maximum main clock frequency of 21 MHz. When processed with a sinc3 filter and a 256 decimation rate, it achieves a typical Signal-to-Noise Ratio (SNR) of 82 dB and an Effective Number of Bits (ENOB) of 13 bits at a data rate of 78.1 kSPS. The component is housed in an 8-lead SOIC_IC package and supports an operating temperature range from -40°C to +125°C.

ADCs/DACs - Special Purpose Feature Summary

• Integrated digital isolation with a rated dielectric insulation voltage (VISO) of 5700 Vrms for 1 minute.
• High isolation common-mode transient immunity (CMTI) of 150 kV/µs minimum.
• 16-bit resolution with no missing codes and a typical SNR of 82 dB.
• Pseudo-differential analog input suitable for shunt voltage monitoring with a full-scale range of ±64 mV.

ADCs/DACs - Special Purpose Applications

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

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix '-RL' indicates reel packaging when sourcing this component. Confirm that the 8-lead SOIC_IC package variant matches the required board layout constraints regarding creepage and clearance distances. Ensure compatibility with the specified power supply ranges: 4.5 V to 5.5 V for the isolated analog side and 3 V to 5.5 V for the non-isolated digital side. Check for moisture sensitivity labeling if storage conditions are a concern.

ADCs/DACs - Special Purpose Selection Notes

Select the ADUM7702-8BRIZ-RL when high-voltage isolation is required directly at the analog front end. This part is appropriate for applications needing a simple serial interface without external isolators. Consider the 8-lead package for space-constrained designs where the 16-lead wide-body option is not feasible. Ensure the system can accommodate the required sinc3 digital filter to achieve the specified 16-bit performance and 78.1 kSPS data rate.

ADCs/DACs - Special Purpose Part Context

The ADUM7702 belongs to the ADuM7701 family of isolated sigma-delta modulators. The ADUM7701-8BRIZ typically supports a wider input range of ±250 mV, whereas the ADUM7702 is optimized for lower voltage inputs of ±50 mV to ±64 mV. Both devices share similar isolation characteristics and digital interface protocols but differ in their analog input specifications and resulting noise performance metrics like ENOB.

ADCs/DACs - Special Purpose Replacement Considerations

The ADUM7701-8BRIZ is a related family member but has different input voltage ranges. No direct public substitute part numbers are confirmed in the provided documentation.