CS5480 datasheet(5/70 Pages) CIRRUS

5 / 70 page

CS5480

DS980F3

1. OVERVIEW

The CS5480 is a CMOS power measurement integrated circuit that uses three

 analog-to-digital

converters to measure line voltage, two currents and temperature. It calculates active, reactive, and

apparent power as well as RMS voltage and current and peak voltage and current. It handles other

system-related functions, such as energy pulse generation, voltage sag and swell, overcurrent and

zero-crossing detection, and line frequency measurement.

The CS5480 is optimized to interface to current transformers, shunt resistors, or Rogowski coils for

current measurement and to resistive dividers or voltage transformers for voltage measurement. Two

full-scale ranges are provided on the current inputs to accommodate different types of current sensors.

The CS5480’s three differential inputs have a common-mode input range from analog ground (GNDA) to

the positive analog supply (VDDA).

An on-chip voltage reference (nominally 2.4 volts) is generated and provided at analog output, VREF±.

Three digital outputs (DO1, DO2, and DO3) provide a variety of output signals, and depending on the

mode selected, energy pulses, zero-crossings, or other choices.

The CS5480 includes a UART/SPI™ serial host interface to an external microcontroller. The serial select

(SSEL) pin is used to configure the serial port to be a SPI or UART. SPI signals include serial data input

(SDI), serial data output (SDO), and serial clock (SCLK). UART signals include serial data input (RX) and

serial data output (TX). A chip select (CS) signal allows multiple CS5480s to share the same serial

interface with the microcontroller.

CS5480 Datasheet(PDF) 5 Page - Cirrus Logic