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ADE7752/ADE7752A
ANALOG INPUTS
CURRENT CHANNELS
The voltage outputs from the current transducers are connected
to the ADE7752 current channels, which are fully differential
voltage inputs. IAP, IBP, and ICP are the positive inputs for IAN,
IBN, and ICN, respectively.
The maximum peak differential signal on the current channel
should be less than ±500 mV (353 mV rms for a pure sinusoidal
signal) for the specified operation.
Figure 17 illustrates the maximum signal levels on IAP and
IAN. The maximum differential voltage between IAP and IAN
is ±500 mV. The differential voltage signal on the inputs must
be referenced to a common mode, such as AGND. The maxi-
mum common-mode signal shown in Figure 17 is ±25 mV.
IAP–IAN
+500mV
IAP
VOLTAGE CHANNELS
The output of the line voltage transducer is connected to the
ADE7752 at this analog input. Voltage channels are a pseudo-
differential voltage input. VAP, VBP, and VCP are the positive
inputs with respect to VN.
The maximum peak differential signal on the voltage channel
is ±500 mV (353 mV rms for a pure sinusoidal signal) for
specified operation.
Figure 18 illustrates the maximum signal levels that can be
connected to the voltage channels of the ADE7752.
Voltage channels must be driven from a common-mode voltage.
In other words, the differential voltage signal on the input must
be referenced to a common mode (usually AGND). The analog
inputs of the ADE7752 can be driven with common-mode
voltages of up to 25 mV with respect to AGND. However, best
results are achieved using a common mode equal to AGND.
DIFFERENTIAL INPUT
± 500mV MAX PEAK
IA
IAN
VAP–VN
V CM
COMMON-MODE
± 25mV MAX
V CM
+500mV
VAP
–500mV
AGND
DIFFERENTIAL INPUT
± 500mV MAX PEAK
VA
VN
V CM
Figure 17. Maximum Signal Levels, Current Channel
–500mV
COMMON-MODE
± 25mV MAX
VCM
AGND
Figure 18. Maximum Signal Levels, Voltage Channel
Rev. C | Page 14 of 24
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