CS5466-ISZ

Overview

The CS5466-ISZ is a single-phase energy metering integrated circuit manufactured by Cirrus Logic. It integrates dual delta-sigma analog-to-digital converters, an energy-to-frequency converter, and pulse outputs on a single chip. The device supports 2- or 3-wire power metering applications with minimal external components. Key electrical parameters include a supply voltage range of 4.75 V to 5.25 V for the analog section and 3.3 V to 5 V for digital I/O. The input impedance is 30 kΩ, and the supply current is 2.9 mA. Energy data linearity is ±0.1% over a 1000:1 dynamic range. The operating temperature range is -40°C to +85°C. The component is housed in a 24-pin SSOP package.

Feature Summary

• Integrates dual delta-sigma ADCs and energy-to-frequency conversion for precise single-phase measurement
• Provides low-frequency pulse outputs for stepper motors or mechanical counters and high-frequency output for calibration
• Includes on-chip 2.5 V reference, power-on reset, and energy direction indicator
• Supports four selectable current input ranges and meets IEC, ANSI, and JIS accuracy specifications

Applications

• Single-phase residential electricity meters
• Industrial single-phase power monitoring systems
• Smart metering infrastructure compliant with international standards

Procurement Notes

Verify component authenticity due to discontinued status. Confirm package integrity as the part is no longer in active production. Check for obsolescence notices from the manufacturer before integration into new designs. Ensure compatibility with existing system voltage levels and interface requirements.

Selection Notes

This component is suitable for legacy maintenance or specific replacement scenarios where pin compatibility with earlier CS546x series devices is required. Designers should evaluate the recommended successor model for new projects due to the discontinuation of this part number. Consider system-level implications of sourcing end-of-life inventory.

Part Context

The CS5466-ISZ belongs to the Cirrus Logic CS546x family of low-cost power and energy measurement ICs. Released in September 2004, it was designed to provide accurate energy calculation for single-phase applications. The ISZ suffix denotes the industrial temperature grade and the 24-SSOP surface-mount package configuration.

Replacement Considerations

The CS5490 is the officially recommended replacement for the CS5466-ISZ. Verify pinout and register compatibility when migrating to the substitute part number.