Skip to main content
Active
Energy Measurement

CS5490

Two Channel Energy Measurement IC
View Datasheet (opens in new tab)

CS5490 Overview

The CS5490 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 CS5490 is a fit for any application requiring high-accuracy energy measurement at a very low price.

CIRRUS®
CIRRUS ROCKS®
ENGINEERED TO ROCK®
INNOVATION THAT ROCKS®

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

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

  • Configurable digital output 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 serial interface

  • Internal register protection via checksum and write-protection

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

  • Single 3.3 V power supply

  • Low power consumption: < 13 mW

  • 16-pin SOIC package

  • 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 CommUART
Digital OutputsSingle Configurable Output
THD (dB)100
ADC Converters2
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
Package16 SOIC

Design Resources

CAD DIAGRAM

CS5490-ISZ

View and download CAD drawings
Page 1 of 3
Browse all resources

Evaluation Boards

  • CS5490 Power Meter Evaluation Board (CDB5490U-Z)

    The CDB5490U evaluation board and GUI software provide an extensive platform for evaluating the CS5490 power measurement device, with multiple analog inputs, isolated UART communication, an onboard microcontroller, and a standalone power-meter application.

    Order SampleUser Guide

  • CS5490 Power Monitor Reference Design (CRD5490-Z)

    The CRD5490-Z evaluates the Cirrus Logic CS5490 power and energy measurement device. It integrates an AC/DC buck supply, voltage and current sensors, and a USB MCU with GUI software for real-time measurement.

    User Guide

CS548x/9x Family

Sales Support

Select your location to find a sales representative or distributor for pricing, availability, and next steps for purchasing this product.
Contact location filters