The CS5464 is an integrated power measurement device which combines three Delta-Sigma analog/digital converters (ADCs), power calculation engine, energy-to-frequency converter and a serial interface into a single integrated circuit. It is designed to accurately measure instantaneous current and voltage and calculates VRMS, IRMS, instantaneous power and average power (active/reactive/apparent) for high-performance power measurement applications.
The CS5464 is optimized to interface to shunt resistors or current transformers for current measurement, and to resistive dividers or potential transformers for voltage measurement.
The CS5464 features a bi-directional serial interface for communication with a processor and a programmable energy-to-pulse output function. It also has a tamper detection scheme that uses the larger of the active powers to register energy. Additional features include system-level calibration, temperature sensor, voltage sag, current fault detection and phase compensation.
| Part | ADC Converters | Current Sensor Options | Active Energy Accuracy | Reactive Energy Accuracy | IRMS Accuracy | SNR (dB) | Serial Comm | Digital Outputs | VREF Drift (ppm/°C) | Input Voltage (V) | Power Cons. (mW) |  Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CS5464 | 3 | Shunt / CT | 0.1% over 1000:1 dynamic range | 0.2% over 1000:1 dynamic range | 0.2% over 1000:1 dynamic range | 78 | SPI | Energy Pulses | 40 | 5 Analog; 3.3 / 5 Digital |
25 | 28 SSOP |
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