ADE7757EB Datasheet, PDF (1/11 Pages) Analog Devices – Evaluation Board Documentation ADE7757 Energy Metering IC

PRELIMINARY TECHNICAL DATA
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Evaluation Board Documentation
ADE7757 Energy Metering IC
Preliminary Technical Data
EVAL-ADE7757EB
FEATURES
Single +5 V Power Supply
Easy Connection of External Transducers via Screw
Terminals
Easy Modification of Signal Conditioning Components
Using PCB Sockets
Trim Pot for Analog Calibration of Meter Constant
Optically Isolated Output for Calibration/Test Purposes
External Reference Option Available for Reference
Evaluation
GENERAL DESCRIPTION
The ADE7757 is a high accuracy energy measurement IC
with integrated oscillator. The part specifications surpass
the accuracy requirements as quoted in the IEC1036 stan-
dard.
The ADE7757 supplies average real power information on the
low frequency outputs F1 and F2. These logic outputs may be
used to directly drive an electromechanical counter or interface
to an MCU. The evaluation board provides screw connectors
for easy connection to an external counter. The CF logic out-
put gives instantaneous real power information. This output is
intended to be used for calibration purposes. The evaluation
board allows this logic output to be connected to an LED or
optoisolator.
The ADE7757 evaluation board can easily be converted into
an energy meter by the addition of a local power supply and
the connection of the appropriate current sensor. A large
amount of prototype area is made available on the evaluation
board for this purpose.
FUNCTIONAL BLOCK DIAGRAM
AGND
VCC VDD DGND
V2P
F1
V2N
74HC08
CF
F2
ADE7757
V1N
V1P
AD780
H11L1
VPLUS
CFOUT
VMINUS
PROTOTYPE
AREA
REV. PrF
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© Analog Devices, Inc., June 2002