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Energy Measurement

CS5480

Three-Channel Energy Measurement IC
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CS5480 Overview

The CS5480 is part of the CS548x/9x family of high-performance analog front end solutions for energy measurement with two (CS5490), three (CS5480) or four (CS5484) 24-bit analog-to-digital converters. It provides high-accuracy energy measurement at a very low price, and on-chip energy calculations and fast on-chip calibration speeds product development cycles.

Flexibility in current sensors, serial communications and digital outputs ensures that the CS5480 is a fit for any application requiring high-accuracy energy measurement at a very low price.

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Product Features

  • Superior analog performance with ultra-low noise level and high SNR

  • Energy measurement accuracy of 0.1% over 4000:1 dynamic range

  • Current RMS measurement accuracy of 0.1% over 1000:1 dynamic range

  • 3 independent 24 bit, 4th order Delta Sigma modulators for voltage and current measurements

  • 3 configurable digital outputs for energy pulses, zero crossing or energy direction

  • Supports shunt resistor, CT and Rogowski coil current sensors

  • Overcurrent, voltage sag and voltage swell detection

  • UART / SPI serial interface

  • Internal register protection via checksum and write-protection

  • On-chip voltage reference (25 ppm/°C typ.)

  • Single 3.3V power supply

  • Low power consumption: < 13mW

  • CS5480: 4mm x 4mm 24-pin QFN ackage

  • On-chip measurements / calculations:

    • Active, reactive and apparent power

    • RMS voltage and current

    • Power factor and line frequency

    • Instantaneous voltage, current and power

Parametric Specifications

Serial CommSPI; UART
Digital Outputs3x Configurable Outputs
THD (dB)100
ADC Converters3
Analog Power Supply (V)3.3
Digital Power Supply (V)3.3
Power Consumption (mW)13
Active Power Accuracy0.1% over 4000:1 dynamic range
Current RMS Accuracy0.1% over 1000:1 dynamic range
Current Sensor OptionsShunt resistor, current transformer, or Rogowski coil
Power Factor Accuracy±0.1% over 1000:1 dynamic range
Reactive Power Accuracy0.1% over 4000:1 dynamic range
Voltage RMS Accuracy±0.1% over 20:1 dynamic range
Voltage Sensor OptionsResistor divider or transformer
FeaturesTemperature sensor|Voltage sag detection|Phase compensation
Package24 QFN

Design Resources

CAD DIAGRAM

CS5480-INZ

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Evaluation Boards

  • CS5480 Power Meter Evaluation Board (CDB5480U-Z)

    The CDB5480U evaluation board and GUI software provide an extensive platform for evaluating the CS5480 power/energy measurement device, with multiple analog inputs, isolated digital interfaces, an onboard microcontroller, and a standalone power-meter application.

    Order SampleUser Guide

CS548x/9x Family

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