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參數資料
| 型號： | ADE7752B |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Polyphase Energy Metering IC with Pulsed Output |
| 中文描述： | 多相電能計量IC脈沖輸出 |
| 文件頁數： | 15/27頁 |
| 文件大小： | 342K |
| 代理商： | ADE7752B |
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Preliminary Technical Data
ADE7752B
ANALOG INPUTS
CURRENT CHANNELS
The voltage outputs from the current transducers are connected
to the ADE7752B current channels, which are fully differential
voltage inputs. IAP, IBP, and ICP are the positive inputs for IAN,
IBN, and ICN, respectively.
Rev. PrA | Page 15 of 27
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.
DIFFERENTIAL INPUT
±
500mV MAX PEAK
+500mV
AGND
V
CM
IA
IAP
V
CM
–500mV
COMMON-MODE
±
25mV MAX
IAN
IAP–IAN
0
Figure 17. Maximum Signal Levels, Current Channel
The maximum signal levels on IAP and IAN are shown in
Figure 17. 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, for example, AGND.
The maximum common-mode signal shown in Figure 17 is
±25 mV.
VOLTAGE CHANNELS
The output of the line voltage transducer is connected to the
ADE7752B 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 speci-
fied operation.
Figure 18 illustrates the maximum signal levels that can be
connected to the ADE7752B voltage channels.
DIFFERENTIAL INPUT
500mV MAX PEAK
+500mV
AGND
VCM
VA
VAP
V
CM
–500mV
COMMON-MODE
±
25mV MAX
VN
VAP–VN
0
Figure 18. Maximum Signal Levels, Voltage Channel
Voltage channels must be driven from a common-mode voltage,
that is, the differential voltage signal on the input must be refer-
enced to a common mode (usually AGND). The analog inputs
of the ADE7752B 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.
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