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
Description
The CS5466 is a low-cost power meter solution incorpo-
rating dual delta-sigma (∆Σ) 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
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
I
VA+
RESET
VD+
IIN+
IIN-
PGA
4th Order
∆Σ
Modulator
Digital
Filter
HPF
Option
FOUT
Energy-to-
Frequency
Conversion
E1
E2
NEG
VREFIN
x1
HPF
FREQ0
Config
FREQ1
FREQ2
IGAIN0
IGAIN1
CPUCLK
XOUT
XIN
VIN+
VIN-
x10
2nd Order
∆Σ
Modulator
Digital
Filter
HPF
Option
VREFOUT
2.5V On-Chip
Reference
Clock
Generator
Copyright
©
Cirrus Logic, Inc. 2005
(All Rights Reserved)
AUG ‘05
DS659F1
CIRRUS [ CIRRUS LOGIC ]
