CS5461A-ISZR

Overview

The CS5461A-ISZR is a single-phase, bi-directional power and energy integrated circuit designed for digital metering applications. It integrates two delta-sigma analog-to-digital converters, a power calculation engine, an energy-to-frequency converter, and a serial interface on a single chip. The device accurately measures instantaneous current and voltage to calculate Vrms, Irms, apparent power, and active power. It features a ±0.1% linearity over a 1000:1 dynamic range and meets IEC, ANSI, and JIS accuracy specifications. Operating with a single supply, it includes on-chip calibration, phase compensation, and a temperature sensor.

Feature Summary

• Integrates dual delta-sigma ADCs with a dedicated power calculation engine for precise measurement of instantaneous, apparent, and active power.
• Provides an on-chip energy-to-frequency converter compatible with mechanical counters or stepper motor drives.
• Supports system calibrations and phase compensation to ensure compliance with international metering standards.
• Includes a low-power temperature sensor and voltage sag detection capabilities within the monitoring suite.

Applications

• Single-phase residential and industrial electricity meters
• Bi-directional power monitoring systems
• Smart grid energy management devices

Procurement Notes

Verify component authenticity through authorized distributors due to potential availability constraints. Confirm package integrity upon receipt as moisture sensitivity requires proper handling. Review the latest Product Change Notification (PCN) for any manufacturing origin or labeling updates. Ensure design-in compatibility with existing serial interface protocols before finalizing procurement plans.

Selection Notes

Select this component for applications requiring high-accuracy single-phase energy measurement with integrated signal conditioning. The device simplifies design by combining analog front-end processing with digital calculation engines. Consider the SSOP-24 package dimensions and thermal characteristics during PCB layout. Evaluate the need for external reference components if specific stability requirements exceed the on-chip reference performance.

Part Context

The CS5461A belongs to Cirrus Logic's CS546x family of high-precision metering ICs. It serves as an upgrade path from earlier models like the CS5460A, offering enhanced functionality such as apparent and reactive power calculations while maintaining pin compatibility. This integration reduces bill-of-materials costs and development time for next-generation metering solutions.

Replacement Considerations

CS5463K-ISZR is a recommended alternative within the same product family offering similar metering capabilities.