ADE7756AN

Overview

The ADE7756AN is a high-accuracy electrical power measurement integrated circuit featuring a serial interface and pulse output. It incorporates two second-order sigma-delta analog-to-digital converters, reference circuitry, and an on-chip temperature sensor. The device performs active power and energy measurement with less than 0.1% error over a dynamic range of 1000 to 1. It supports IEC 687/1036 standards and includes a sampled waveform register holding five seconds of accumulated power at full load. Data is accessed via an SPI-compatible serial interface, while a programmable frequency pulse output indicates active power levels.

Feature Summary

• Dual second-order sigma-delta ADCs for precision signal conversion
• On-chip user-programmable threshold for line voltage sag detection
• Digital calibration capabilities for power, phase, and input offset
• Integrated interrupt request pin for register overflow warnings

Applications

• High-accuracy electrical power metering systems
• Industrial energy monitoring equipment
• Utility-grade electricity meters compliant with IEC standards
• Power supply supervisory circuits requiring voltage sag detection

Procurement Notes

Verify the specific suffix 'AN' corresponds to the required package type and temperature rating during procurement. Confirm that the SPI-compatible serial interface requirements match the host controller's communication protocol. Ensure the single 5V supply constraint aligns with the system power architecture. Validate that the pulse output frequency range meets the downstream counting or measurement device specifications.

Selection Notes

Select this component when high accuracy over a wide dynamic range is critical. The dual sigma-delta ADCs provide superior noise performance compared to simpler architectures. Consider the on-chip temperature sensor if environmental compensation is needed without external components. The integrated DSP ensures stability across varying conditions, reducing the need for complex external calibration circuitry.

Part Context

The ADE7756 belongs to Analog Devices' family of dedicated power measurement ICs designed for utility and industrial applications. It integrates signal processing functions typically handled by discrete components, simplifying board design. The device focuses on active energy measurement, distinguishing it from general-purpose data acquisition chips by its specialized registers for energy accumulation and waveform sampling.

Replacement Considerations

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