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CS5484 Datasheet(PDF) 1 Page - Cirrus Logic |
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CS5484 Datasheet(HTML) 1 Page - Cirrus Logic |
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1 / 67 page  Copyright Cirrus Logic, Inc. 2013 (All Rights Reserved) Cirrus Logic, Inc. http://www.cirrus.com CS5484 Four Channel Energy Measurement IC Features & Description • 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 • 4 Independent 24-bit, 4th-order, Delta-Sigma Modulators for Voltage and Current Measurements • 4 Configurable Digital Outputs for Energy Pulses, Zero-crossing, or Energy Direction • Supports Shunt Resistor, CT, and Rogowski Coil Current Sensors • On-chip Measurements/Calculations: - Active, Reactive, and Apparent Power - RMS Voltage and Current - Power Factor and Line Frequency - Instantaneous Voltage, Current, and Power • Overcurrent, Voltage Sag, and Voltage Swell Detection • Ultra-fast On-chip Digital Calibration • Internal Register Protection via Checksum and Write Protection • UART/SPI™ Serial Interface • On-chip Temperature Sensor • On-chip Voltage Reference (25ppm/°C Typ.) • Single 3.3V Power Supply • Ultra-fine Phase Compensation • Low Power Consumption: <13mW • Power Supply Configurations - GNDA = GNDD = 0V, VDDA = +3.3V • 5mmx5mm 28-pin QFN Package ORDERING INFORMATION See Page 68. Description The CS5484 is a high-accuracy, four-channel, energy measurement analog front end. The CS5484 incorporates independent 4th order Delta-Sigma analog-to-digital converters for every channel, reference circuitry, and the proven EXL signal processing core to provide active, reactive, and apparent energy measurement. In addition, RMS and power factor calculations are available. Calculations are output through a configurable energy pulse, or direct UART/SPI™ serial access to on-chip registers. Instantaneous current, voltage, and power measurements are also available over the serial port. Multiple serial options are offered to allow customer flexibility. The SPI provides higher speed, and the 2-wire UART minimizes the cost of isolation where required. Four configurable digital outputs provide energy pulses, zero-crossing, energy direction, and interrupt functions. Interrupts can be generated for a variety of conditions including voltage sag or swell, overcurrent, and more. On-chip register integrity is assured via checksum and write protection. The CS5484 is designed to interface to a variety of voltage and current sensors including shunt resistors, current transformers, and Rogowski coils. On-chip functionality makes digital calibration simple and ultra-fast, minimizing the time required at the end of the customer production line. Performance across temperature is ensured with an on-chip voltage reference with low drift. A single 3.3V power supply is required, and power consumption is low at <13mW. To minimize space requirements, the CS5484 is offered in a low-cost, 5mm x5mm 28-pin QFN package. VDDA TX / SDO RX / SDI UART/SPI Serial Interface Configurable Digital Outputs RESET Calculation 4th Order Modulator HPF Option DO1 DO2 HPF Option VREF+ VDDD VREF- System Clock IIN2+ IIN2- PGA IIN1+ IIN1- PGA 10x CS5484 CS SCLK SSEL DO3 VIN1+ VIN1- 10x VIN2+ VIN2- Digital Filter Digital Filter DO4 MODE HPF Option Digital Filter HPF Option Digital Filter M U X 4th Order Modulator 4th Order Modulator 4th Order Modulator GNDA GNDD Voltage Reference Temperature Sensor XIN XOUT CPUCLK Clock Generator MAR’13 DS981F3 |
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