CS5490-ISZ Two Channel Energy Measurement IC (SOIC-16) – SMD
Current & Power Monitors & Regulators 2Ch Energy Mgt AFE
The CS5490 is a high-accuracy, two-channel, energy measure- ment analog front end.
The CS5490 incorporates independent 4th order Delta-Sigma an- alog-to-digital converters for both channels, reference circuitry, and the proven EXL signal processing core to provide active, re- active, and apparent energy measurement. In addition, RMS and power factor calculations are available. Calculations are output via a configurable energy pulse, or direct UART serial access to on-chip registers. Instantaneous current, voltage, and power measurements are also available over the serial port. The two-wire UART minimizes the cost of isolation where required.
A configurable digital output provides energy pulses, zero-cross- ing, energy direction, or 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 CS5490 is designed to in- terface 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 to minimize the time required at the end of the customer pro- duction line. Performance across temperature is ensured with an on-chip voltage reference with low drift. A single 3.3V power sup- ply is required, and power consumption is low at <13mW. To minimize space requirements, the CS5490 is offered in a low-cost 16-pin SOIC package.