AD7756AN

Overview

The AD7756AN 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 measurements with less than 0.1% error over a dynamic range of 1000 to 1. It operates from a single 5 V supply with typical power consumption of 25 mW.

Feature Summary

• High accuracy performance supporting IEC 687/1036 standards
• On-chip user programmable threshold for line voltage sag detection
• Proprietary ADCs and DSP for stability under environmental variations

Applications

• Single-phase energy metering systems
• Active power measurement applications
• Utility metering infrastructure

Procurement Notes

Verify the specific suffix 'AN' corresponds to the PDIP-20 package and industrial temperature range during sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before procurement. Ensure the component matches the exact part number to avoid functional discrepancies in metering designs.

Selection Notes

Select this component for applications requiring precise active energy measurement with minimal external calibration. The integrated sigma-delta ADCs and digital signal processing simplify design complexity. Consider the single 5 V supply requirement and SPI-compatible serial interface when defining system architecture constraints.

Part Context

The AD7756 belongs to Analog Devices' family of high-accuracy energy metering ICs. It is designed to replace discrete solutions by integrating ADCs, references, and DSP functions. This integration reduces board space and improves measurement consistency across varying environmental conditions and time.

Replacement Considerations

Consult official Analog Devices documentation for verified cross-reference part numbers. Do not substitute with generic power management ICs as they lack the specialized metrology features.