3-Channel, Single Phase Power/Energy IC

The CS5464 is an integrated power measurement device which combines three Delta-Sigma analog/digital converters (ADCs), power calculation engine, energy-to-frequency converter and a serial interface into a single integrated circuit. It is designed to accurately measure instantaneous current and voltage and calculates VRMS, IRMS, instantaneous power and average power (active/reactive/apparent) for high-performance power measurement applications.The CS5464 is optimized to interface to shunt resistors or current transformers for current measurement, and to resistive dividers or potential transformers for voltage measurement.The CS5464 features a bi-directional serial interface for communication with a processor and a programmable energy-to-pulse output function. It also has a tamper detection scheme that uses the larger of the active powers to register energy. Additional features include system-level calibration, temperature sensor, voltage sag, current fault detection and phase compensation.

Technology

Energy Measurement

Features

  • Energy data linearity: ±0.1% of reading over 1000:1 dynamic range
  • On-chip Functions:
    • Instantaneous voltage, current and power IRMS and VRMS, active, reactive and apparent power
    • Current fault and voltage sag detect
    • System calibrations/phase compensation
    • Temperature sensor
    • Energy-to-pulse conversion
    • Positive-only accumulation mode
  • Meets accuracy spec for IEC, ANSI and JIS
  • Low power consumption
  • Current input optimized for sense resistor
  • GND-referenced signals with single supply
  • On-chip 2.5 V reference (25 ppm/°C typ)
  • Power-supply monitor
  • Simple 3-wire digital serial interface
  • “Auto-boot” mode from serial E²PROM
  • Power supply configurations
    • VA+ = +5 V; AGND = 0 V; VD+ = 3.3 V to 5 V
  • Package: 28-pin SSOP; lead-free assembly

Parametric Specifications

ADC Converters 3
Current Sensor Options Shunt;
CT
Active Energy Accuracy 0.1% over 1000:1 dynamic range
Reactive Energy Accuracy 0.2% over 1000:1 dynamic range
SNR (dB) 78
Digital Outputs Energy Pulses
Analog Power Supply (V) 5
Supply Current (µA) 3.3-5
Power Consumption (mW) 25
Package 28 SSOP

Technical Documents

CS5464 Product Data Sheet

May 9, 2011, DS682F3 : 469 Kb

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Comprehensive Solutions