ADE7757EB AD [Analog Devices], ADE7757EB Datasheet

no-image

ADE7757EB

Manufacturer Part Number
ADE7757EB
Description
Evaluation Board Documentation ADE7757 Energy Metering IC
Manufacturer
AD [Analog Devices]
Datasheet
a
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
REV. PrF
Preliminary Technical Data
FEATURES
Single +5 V Power Supply
Easy Connection of External Transducers via Screw
Easy Modification of Signal Conditioning Components
Trim Pot for Analog Calibration of Meter Constant
Optically Isolated Output for Calibration/Test Purposes
External Reference Option Available for Reference
Terminals
Using PCB Sockets
Evaluation
PRELIMINARY TECHNICAL DATA
V1N
V2P
V2N
V1P
AGND
FUNCTIONAL BLOCK DIAGRAM
ADE7757
AD780
VCC
PROTOTYPE
Evaluation Board Documentation
AREA
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, USA
Tel: 781/329-4700
Fax: 781/326-8703
VDD DGND
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.
74HC08
ADE7757 Energy Metering IC
CF
H11L1
EVAL-ADE7757EB
VPLUS
CFOUT
VMINUS
F1
F2
© Analog Devices, Inc., June 2002
www.analog.com

Related parts for ADE7757EB

ADE7757EB Summary of contents

Page 1

... FUNCTIONAL BLOCK DIAGRAM AGND VCC VDD DGND 74HC08 ADE7757 AD780 PROTOTYPE AREA One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, USA Tel: 781/329-4700 Fax: 781/326-8703 EVAL-ADE7757EB VPLUS H11L1 CFOUT VMINUS www.analog.com © Analog Devices, Inc., June 2002 ...

Page 2

... PRELIMINARY TECHNICAL DATA EVAL-ADE7757EB ANALOG INPUTS (SK1 AND SK2) Voltage and current signals are connected at the screw termi- nals SK1 and SK2 respectively. All analog input signals are filtered using the on-board antialias filters before being pre- sented to the analog inputs of the ADE7757. Some analog inputs offer additional signal conditioning, e ...

Page 3

... A. The frequency outputs F1 and F2 can be used to drive a mechanical counter. These outputs will be cali- brated to provide 100 imp/kWhr. The logic output CF has an output frequency that can 2048 times higher –3– EVAL-ADE7757EB resistor with low 5.000V SK3A SK3B AGND VDD ...

Page 4

... PRELIMINARY TECHNICAL DATA EVAL-ADE7757EB than the frequency on F1 and F2. This output can be used for calibration purposes and is shown connected to a fre- quency counter via the optoisolator in Figure 6. At maximum current (25 A), the power seen by the meter will be 5.5 kW. This will produce a frequency of 0.153 and F2 when these outputs are calibrated to 100imp/kWhr (100imp/ ...

Page 5

... Also see Figure 10. Closed When closed, the trim pot becomes part of the attenuation network. In this mode of operation, the resistor R21 should be removed from its PCB jack sockets and JP17B must be opened REV. PrF EVAL-ADE7757EB –5– ...

Page 6

... PRELIMINARY TECHNICAL DATA EVAL-ADE7757EB Figure 7. ADE7757 Evaluation Board Jumper Positions –6– REV. PrF ...

Page 7

... Quad CMOS AND gates. 2.5 V Reference, Supplied by Analog Devices Inc. Optical Isolator, by QT, FARNELL Part No. 326-896. Low Current, Red, FARNELL Part No. 637-087. 151-785. Length 10 mm, Pitch 5 mm, Pin diameter 1 mm. 151-786. Length 15 mm, Pitch 5 mm, Pin diameter 1 mm. –7– EVAL-ADE7757EB 3337161S ...

Page 8

... PRELIMINARY TECHNICAL DATA EVAL-ADE7757EB SK3B SK3A AGND VDD JP5 JP18 B R19 SK2A JP17 R20 R21 R15 A JP6 C18 V2 R22 JP7 R18 SK2B JP8 C19 JP1 SK1A TP1 R16 SK1B JP2 C16 V1 JP3 TP2 R17 SK1C JP4 C17 VDD JP10 ...

Page 9

... PRELIMINARY TECHNICAL DATA REV. PrF Figure 9. PCB Layout–Component Side –9– EVAL-ADE7757EB ...

Page 10

... PRELIMINARY TECHNICAL DATA EVAL-ADE7757EB Figure 10. PCB Layout–Solder Side –10– REV. PrF ...

Page 11

... PRELIMINARY TECHNICAL DATA REV. PrF Figure 11. PCB Layout–Component Placement –11– EVAL-ADE7757EB ...

Related keywords