ADE7761BARSZ

Overview

The ADE7761BARSZ is a single-phase energy metering integrated circuit manufactured by Analog Devices Inc. It operates on a single 5 V supply with a voltage range of 4.75 V to 5.25 V and functions within a temperature range of -40°C to +85°C. The device utilizes an SSOP-20 surface-mount package. Internally, it incorporates four analog-to-digital converters (ADCs) and a fixed-function digital signal processor (DSP). Key electrical parameters include a resolution of 1 bit and support for direct drive of electromechanical counters.

Feature Summary

• Integrated fault detection capabilities for monitoring phase and neutral current imbalances in two-wire distribution systems.
• Built-in missing neutral detection logic that automatically selects the appropriate current input for billing during fault conditions.
• On-chip oscillator and reference circuitry providing system clock and stable voltage reference without external components.
• Direct drive outputs for electromechanical energy meters and stepper motors via dedicated frequency output pins.

Applications

• Single-phase electrical energy measurement in residential utility metering systems
• Tamper-resistant energy meter designs utilizing missing neutral detection features
• Two-wire distribution system monitoring for fault condition identification

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm RoHS compliance status and check for obsolescence notices, as availability may be restricted. Ensure storage conditions meet manufacturer specifications to prevent degradation of the SSOP-20 package integrity prior to assembly.

Selection Notes

Select this component for applications requiring high accuracy active energy measurement compliant with IEC 62053-21 standards. It is suitable for designs needing integrated fault tolerance and missing neutral detection without external processing. Consider the SSOP-20 footprint and single-supply requirement when designing the PCB layout and power regulation stages.

Part Context

The ADE7761BARSZ belongs to the ADE7761B series of specialized data acquisition ADCs designed for energy metering. It represents a low-cost, single-chip solution that combines analog front-end conversion with digital signal processing. This integration reduces bill-of-materials complexity compared to discrete solutions while maintaining high precision over varying environmental conditions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing design constraints before considering alternative devices from the same manufacturer family.