CS5466-ISZR

Overview

The CS5466-ISZR 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 for low-cost power measurement applications. The device supports single-phase two-wire or three-wire metering systems with high accuracy. Key electrical parameters include a supply voltage range of 4.75V to 5.25V for the analog section and 3.3V to 5V for the digital section. It operates within a temperature range of -40°C to +85°C and features a 24-pin SSOP surface-mount package.

Feature Summary

• Integrates dual delta-sigma ADCs and an energy-to-frequency converter for precise single-phase power measurement
• Provides programmable gain amplifiers and on-chip 2.5V reference voltage to minimize external component requirements
• Delivers low-frequency E1/E2 pulses for mechanical counter driving and high-frequency FOUT pulses for system calibration
• Supports four selectable current input ranges and includes digital filtering for enhanced signal processing

Applications

• Single-phase residential electricity meters
• Industrial single-phase power monitoring systems
• Consumer electronics requiring accurate energy consumption tracking
• Smart metering infrastructure compliant with IEC/ANSI/JIS standards

Procurement Notes

Verify that the specific suffix ISZR corresponds to the tape-and-reel packaging variant rather than the tube-packaged ISZ version. Confirm end-of-life status as the component is discontinued and no longer recommended for new designs. Ensure compatibility with existing board layouts if substituting from other packages. Check for moisture sensitivity levels prior to soldering processes.

Selection Notes

Select this component for cost-sensitive single-phase metering designs requiring high linearity over a wide dynamic range. Consider the停产 status when planning long-term production cycles. Evaluate the need for external references or filters based on the integrated capabilities. Compare against newer alternatives like the CS5490 for future-proofing requirements.

Part Context

The CS5466 series represents Cirrus Logic's solution for low-cost, high-accuracy energy metering. Released in 2004, it targets the residential and light industrial metering markets. The ISZR suffix specifically denotes the reel-packaged version of the chip, facilitating automated assembly processes compared to the bulk tube packaging of the standard ISZ variant.

Replacement Considerations

The CS5490 is the officially recommended replacement part number for the discontinued CS5466 series. Designers should evaluate pinout compatibility and software register mapping differences between the legacy CS5466 and the successor CS5490 before transitioning.