Cirrus Logic CS5466 - Manual

Copyright  Cirrus Logic, Inc. 2011
(All Rights Reserved)
http://www.cirrus.com
CS5466
Low-cost Power/Energy IC with Pulse Output
Features
 Single-chip Power Measurement Solution
 Energy Data Linearity:
±0.1% of Reading, over 1000:1 Dynamic Range
 On-chip functions: Measures Power and
Performs Energy-to-pulse Conversions
 Meets Accuracy Spec for IEC, ANSI, & JIS.
 High-pass Filter Option
 Four Input Ranges for Current Channel
 On-chip, 2.5 V Reference
 Pulse Outputs for Stepper Motor or
Mechanical Counter
 On-chip Energy Direction Indicator
 Ground-referenced Input Signals with Single
Supply
 High-frequency Output for Calibration
 On-chip, Power-on Reset (POR)
 Power Supply Configurations:
VA+ = +5 V; AGND = 0 V; VD+ = +3.3 V to 5 V
Description
The CS5466 is a low-cost power meter solution incorpo-
rating dual delta-sigma (
analog-to-digital converters
ADCs), an energy-to-frequency converter, and energy
pulse outputs on a single chip. The CS5466 is designed
to accurately measure and calculate energy for single
phase, 2- or 3-wire power metering applications with
minimal external components.
The low-frequency pulse outputs, E1 and E2, provide
pulses at a frequency which is proprtional to the active
power and can be used to drive a stepper motor or a me-
chanical counter. Energy direction output, NEG,
indicates when pulse outputs E1 and E2 represent neg-
ative active power. The high-frequency pulse output
FOUT is designed to assist in system calibration.
The CS5466 has configuration pins which allow for direct
configuration of pulse output frequency, current channel
input range, and high-pass filter enable option.
The CS5466 also has a power-on reset function which
holds the part in reset until the supply reaches an oper-
able level.
ORDERING INFORMATION
See page 16 .
I
IIN+
IIN-
IGAIN0
IGAIN1
VIN+
VIN-
VREFOUT
VA+ RESET VD+
DGND AGND
FOUT
E1
E2
CPUCLK
XOUT
XIN
FREQ0
FREQ1
FREQ2
PGA
x10
NEG
4th Order 
Modulator
2nd Order 
Modulator
HPF
Option
Config
Clock
Generator
Digital
Filter
Digital
Filter
2.5V On-Chip
Reference
VREFIN x1
HPF
Option
HPF
Energy-to-
Frequency
Conversion
APR ‘11
DS659F2