CS5460 Datasheet, PDF (1/34 Pages) Cirrus Logic – Single Phase Bi-Directional Power/Energy IC

CS5460
Single Phase Bi-Directional Power/Energy IC
Features
l Energy Data Linearity: 0.1% of Reading over
1000:1 Dynamic Range
l On-Chip Functions: Energy, I ∗ V,
I_RMS and V_RMS, Energy to Pulse-Rate
Conversion
l Complies with IEC 687/1036, JIS
l Power Consumption <12 mW
l Interface Optimized for Shunt Sensor
l Phase Compensation
l Ground-Referenced Signals with Single
Supply
l System Calibration
l On-chip 2.5 V Reference (60 ppm/°C drift)
l Simple Three-wire Serial Interface
l Watch Dog Timer
l Power Supply Monitor
l Power Supply Configurations
- VA+ = +5 V; VA- = 0V; VD+ = +3 V to +5 V
- VA+ = +2.5 V; VA- = -2.5 V; VD+ = +3 V
Description
The CS5460 is a highly integrated ∆Σ Analog-to-Digital
Converter (ADC) which combines two ∆Σ ADCs, high
speed power calculation functions, and a serial interface
on a single chip. It is designed to accurately measure
and calculate: Energy, Instantaneous Power, I_RMS, and
V_RMS for single phase 2 or 3-wire power meter applica-
tions. The CS5460 interfaces to a low cost shunt or
transformer to measure current, and resistive divider or
transformer to measure voltage. The CS5460 features a
bi-directional serial interface for communication with a
micro-controller and a fixed-width programmable fre-
quency output that is proportional to energy. The product
is initialized and fully functional upon power-up, and in-
cludes facilities for system-level calibration under control
of the user program.
ORDERING INFORMATION:
CS5460-BS -40°C to +85°C
24-pin SSOP
VA+
RESET
VD+
IIN+
PGA
IIN-
x10,x50
4^th Order
∆Σ
Modulator
VIN+
VIN-
VREFIN
VREFOUT
x10
2^nd Order
∆Σ
Modulator
x1
Voltage
Reference
Power
Monitor
Digital
Filter
Digital
Filter
System
Clock
/K
High Pass
Filter
Power
Calculation
Engine
(Energy
I*V
I_RMS ,V_RMS )
High Pass
Filter
Clock
Generator
Watch Dog
Timer
Serial
Interface
E-to-F
Calibration
SRAM
CS
SDI
SDO
SCLK
INT
EDIR
EOUT
VA-
PFMON
XIN XOUT CPUCLK
DGND
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
P.O. Box 17847, Austin, Texas 78760
[phone] FAX: [phone]
http://www.cirrus.com
Copyright  Cirrus Logic, Inc. 2000
(All Rights Reserved)
JAN ‘00
DS279PP5
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