AD7751AAN

Overview

The AD7751AAN is a high-accuracy, fault-tolerant electrical energy measurement integrated circuit designed for two-wire distribution systems. It features three sigma-delta analog-to-digital converters with a 16-bit resolution and operates on a single 5 V supply with typical power consumption of 15 mW. The device supports 50 Hz and 60 Hz frequencies, offering less than 0.1% error over a dynamic range of 500 to 1. It includes an internal 2.5 V reference and provides frequency outputs for real power measurement.

Feature Summary

• High-accuracy energy measurement supporting IEC 687/1036 standards
• On-chip fault detection and continuous phase/neutral current monitoring
• Direct drive capability for electromechanical counters and stepper motors
• Integrated programmable gain amplifier for flexible sensor interfacing

Applications

• Single-phase residential and commercial energy meters
• Two-wire distribution system monitoring
• Calibration equipment requiring high precision
• Smart metering applications with fault detection needs

Procurement Notes

Verify the specific suffix 'AAN' against Analog Devices official documentation to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints and thermal requirements. Confirm availability status through authorized distributors as lead times may vary. Validate RoHS compliance and environmental specifications for the intended deployment region.

Selection Notes

Select this component when high accuracy in two-wire systems is required. It is suitable for applications needing direct counter driving and fault detection. Consider the SSOP-24 package constraints and single 5 V supply requirement. Evaluate if the integrated DSP and ADC architecture meets the dynamic range and linearity needs of the specific metering application.

Part Context

The AD7751 series belongs to Analog Devices' specialized energy metering IC family. It is designed to surpass IEC1036 accuracy requirements. The AAN variant typically denotes a specific package and industrial temperature range configuration within the broader ADE7751 product line, focusing on reliable performance in utility metering environments.

Replacement Considerations

Check for direct pin-compatible upgrades or functional equivalents within the ADE7751 family. Verify that any substitute maintains the same fault detection logic and frequency output characteristics. Ensure the replacement supports the same 5 V supply and power consumption profiles.