UG-061
Evaluation Board User Guide
Rev. 0 | Page 10 of
Voltage Sense Inputs
The voltage input connections on the ADE71xx/ADE75xx/
ADE51xx/ADE55xx evaluation board can be connected directly
to the line voltage source. However, an isolation transformer is
recommended for safety reasons. The line voltage is attenuated
using a simple resistor divider network before it is presented to the
ADE71xx/ADE75xx/ADE51xx/ADE55xx. The voltage channel
is recommended to be used in a single-ended configuration.
Figure 9 shows a typical connection for the line voltage.
Note that the analog input VN is connected to AGND via the
antialias filter R14/C15. Jumper JP9 should be left open.
The voltage attenuation network is made up of R12, R13, and
R15. The maximum signal level permissible at VP is 0.5 V peak.
The signal range should not exceed ±0.5 V with respect to
AGND for specified operation.
The attenuation network can be easily modified by the user to
accommodate any input signal level. However, the value of R15
(1 kΩ) should not be altered because the phase response of
Channel 2 should match that of Channel 1.
R21
0
Ω
R25
0
Ω
R14
1k
Ω
JP9
C15
0.033µF
R10
0
Ω
JP5
R22
1k
Ω
JP4
C16
0.033µF
ADE7169/
ADE5169
VP
VP
VN
VN
VP
VN
P3 1
P3 2
08600-
063
100V RMS TO 250V RMS
NEUTRAL
JP6
R15
1k
Ω
R13
499k
Ω
R12
499k
Ω
PHASE
Figure 9. Typical Line Voltage Connection
