CS5480-INZR

The CS5480-INZR is a high-accuracy, three-channel, energy mea-surement analog front end. The CS5480-INZR incorporates independent, 4th order, Delta-Sigma analog-to-digital converters for every channel, reference cir-cuitry, and the proven EXL signal processing core to provide active, reactive, and apparent energy measurement. In addi-tion, RMS and power factor calculations are available. Calculations are output via 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. Three 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 CS5480-INZR is designed to interface to a variety of voltage and current sen-sors including shunt resistors, current transformers, and Rogowski coils. On-chip functionality makes digital calibration simple and ul-tra-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 very low drift. A single 3.3V power supply is required, and power consump-tion is very low at <13mW. To minimize space requirements, the CS5480-INZR is offered in a low-cost, 4mm x 4mm 24-pin QFN package.

• Superior Analog Performance with Ultra-low Noise Level & 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, & 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/SPITM Serial Interface
• On-chip Temperature Sensor
• On-chip Voltage Reference (25 ppm /