ADE7757EB AD [Analog Devices], ADE7757EB Datasheet - Page 5

• Manufacturer Part Number: ADE7757EB
• Description: Evaluation Board Documentation ADE7757 Energy Metering IC
• Manufacturer: AD [Analog Devices]

JP8
JP9
JP10
JP11
JP12
JP13
JP14
JP15
JP16
JP17
JP18
REV. PrF
Closed
Open
N
P
Open
Closed
1
0
1
0
1
0
A
B
Closed
N
P
A
B
Open
Closed
Analog input V2N is connected to
analog ground (AGND) via the
antialias filter/attenuation network.
This option should be selected if
Channel 2 is used in a single-ended
mode.
V2N connected to SK2B for differential
operation.
SK2B connected to V2N.
SK2B connected to V2P.
ADE7757 internal (on-chip) reference
selected.
External (AD780) reference selected.
SCF connected to VDD.
SCF connected to DGND.
S1 connected to VDD.
S1 connected to DGND.
S0 connected to VDD.
S0 connected to DGND.
CF logic output connected to optically
isolated output at SK5.
CF logic output connected to LED.
VDD and +5V connected together.
Note: VDD is power supply for
ADE7757 IC (U1) and +5V is power
supply for buffer (U2)
SK2A connected to V2N.
SK2A connected to V2P.
Trim pot R15 is connected to V2P or
V2N (depending on the position of
JP16)—see Figure 8. This allows the
output frequency to be scaled using the
voltage on V2P.
When option B is selected, the jumper
JP18 should be left open. In this con-
figuration the attenuation for V2P is
provided via the fixed resistors R19,
R20, R21 and R22.
When open, the attenuation on V2P is
provided by fixed resistor as explained
above. Also see Figure 10.
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
PRELIMINARY TECHNICAL DATA
–5–
EVAL-ADE7757EB