Cirrus Logic CS5462 - Manual

Copyright  Cirrus Logic, Inc. 2011
(All Rights Reserved)
http://www.cirrus.com
CS5462
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 Energy and
Performs Energy-to-Pulse Conversions
 Meets Accuracy Spec for IEC 687/1036
 On-chip System Calibration Option
 High-pass Filter Option for Both I and V
 2 Available Current Input Ranges
 On-chip 2.5 V Reference (25 ppm/°C typ)
 Pulse Outputs for Stepper Motor or Mechanical
Counter
 On-chip Energy Direction Indicator
 Ground Reference Input Signals with Single
Supply
 High-frequency Output for Calibration
 On-chip Power-on Reset
 Power Supply Configurations:
VA+ = +5 V; AGND = 0 V; VD+ = +3.3 V to 5 V
Description
The CS5462 is a low-cost power meter solution
combining two
 analog-to-digital converters ADCs),
an energy-to-frequency converter, and energy pulse
outputs on a single chip. It is designed to accurately
measure and calculate energy for single-phase 2- or 3-
wire power metering applications with minimal external
components.
Low-frequency energy outputs, E1 and E2, supply
average real power and can be used to drive a stepper
motor or a mechanical counter; the high-frequency
energy output FOUT can be used for calibration; and
NEG indicates negative power.
The CS5462 has configuration pins which allow for direct
configuration of pulse output format, pulse output
frequency, current channel input range, high-pass filter
option, and on-chip calibration.
The CS5462 also has a power-on reset function which
holds the part in reset until the supply reaches an
operable level.
ORDERING INFORMATION:
See page 16.
I
PGA
VA+
IIN+
IIN-
VIN+
VIN-
VREFIN
VREFOUT
High Pass
Filter
Voltage
Reference
x1
RESET
Digital
Filter
High Pass
Filter
x10
Energy to
Pulse Rate
Converter
4th Order

Modulator
2nd Order 
Modulator
Digital
Filter
x10,x50
DGND / P1
Energy
Direction
Calibration
VD+ / P7
Configuration Inputs: On-Chip Calibration,
Pulse Output Mode / Output Frequency,
HPF Option, and
Current Channel Input Range
Clock
Generator
XOUT
CPUCLK
E2 / P4
E1 / P5
FOUT / P6
IGAIN CAL1 FREQ CAL0
NEG/P2
P3
XIN
Program Select
Outputs
for
Configuration
AGND
APR 11
DS547F1