EVAL-ADE7756EB Datasheet, PDF (5/15 Pages) Analog Devices – Evaluation Board Documentation AD7756 Energy metering IC

PRELIMINARY TECHNICAL DATA
PRELIMINARY TECHNICAL DATA
EVAL-ADE7756EB
JP2
JP15
JP1
JP4
JP25
JP3
JP20
AD7756
JP10
JP7
JP8
JP9
JP51
JP13
JP11
JP21
JP14
AB
JP5
JP6
JP19
JP12
AB
Figure 5 - ADE7756 evaluation board jumper positions
SETTING UP THE ADE7756 EVALUATION BOARD
Shown below is a typical set up for the ADE7756 evalua-
tion board. In this example a kWh meter for a 3 wire,
single phase distribution system is shown. For a more
detailed description on how to use a CT as a current
transducer see the Current Sense Inputs section of this docu-
mentation. The line voltage is connected directly to the
evaluation board as shown. Note JP7 should be left open
to ensure that the attenuation network is not bypassed.
Also note the use of two power supplies. The second
power supply is used to power the optical isolation. With
JP14 left open, this will ensure that there is no electrical
connection between the high voltage test circuit and the
PC. The power supplies should have floating voltage
outputs.
The evaluation board is connected to the PC parallel port
using the cable supplied. The cable length should not
exceed 6 feets (2 meters) or the serial communication
between the PC and the evaluation board may become
unpredictable and error prone.
When the evaluation board has been powered up and is
connected to the PC, the supplied software can be
launched. The software will automatically start in energy
meter mode. The next section describes the ADE7756
evaluation software in detail and how it can be installed
and uninstalled.
-
5.000 V
+
-
5.000 V
+
110V
10A
10A
110V
V+
V-
1:2000
CT
SK2
2.5Ω
SH1A
AGND
SH1B
2.5Ω
SK1
25mV
SK4
V1P
V1N
JP1 = Open
JP2 = Open
JP3 = Open
JP4 = Open
JP5 = B
JP6 = B
25mV
JP9
JP7 = Open JP13 = Open
JP8 = Open JP14 = Open
JP9 = Open JP15 = Closed
JP10 = Closed JP19 = B
JP11 = Closed JP20 = Closed
JP12 = B
JP21 = Closed
JP25 = Closed
R57
1kΩ
JP10
V2N
C54
33nF
450mV
JP7
220V
R53
255kΩ
JP8
R54
255kΩ
C53
33nF
V2P
1kΩ
1.0666 Hz
SK5
BNC2
To PC
Parallel Port
Load _Load
110V
REV. PrB 01/01
Figure 6 - Typical set up for the ADE7756 evaluation board
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