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參數資料
| 型號： | ADE7757AARZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | LEAD FREE, MS-012AC, SOIC-16 |
| 文件頁數： | 4/24頁 |
| 文件大?。?/td> | 391K |
| 代理商： | ADE7757AARZ |
ADE7757A
Preliminary Technical Data
Rev. PrE | Page 12 of 24
ANALOG INPUTS
CHANNEL V1 (CURRENT CHANNEL)
The voltage output from the current sensor is connected to the
ADE7757A here. Channel V1 is a fully differential voltage
input. V1P is the positive input with respect to V1N.
The maximum peak differential signal on Channel V1 should
be less than ±30 mV (21 mV rms for a pure sinusoidal signal)
for specified operation.
+30mV
–30mV
VCM
V1
DIFFERENTIAL INPUT
±30mV MAX PEAK
COMMON MODE
±6.25mV MAX
V1P
V1N
V1
VCM
AGND
05330-007
Figure 17. Maximum Signal Levels, Channel V1
The diagram in Figure 17 illustrates the maximum signal
levels on V1P and V1N. The maximum differential voltage is
±30 mV. The differential voltage signal on the inputs must be
referenced to a common mode, such as AGND. The maximum
common-mode signal is ±6.25 mV, as shown in Figure 17.
CHANNEL V2 (VOLTAGE CHANNEL)
The output of the line voltage sensor is connected to the
ADE7757A at this analog input. Channel V2 is a fully
differential voltage input with a maximum peak differential
signal of ±165 mV.
Figure 18 illustrates the maximum signal levels that can be
connected to the ADE7757A Channel V2.
+165mV
–165mV
VCM
V2
DIFFERENTIAL INPUT
±165mV MAX PEAK
COMMON MODE
±25mV MAX
V2P
V2N
V2
VCM
AGND
05330-008
Figure 18. Maximum Signal Levels, Channel V2
Channel V2 is usually driven from a common-mode voltage,
that is, the differential voltage signal on the input is referenced
to a common mode (usually AGND). The analog inputs of the
ADE7757A 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.
TYPICAL CONNECTION DIAGRAMS
Figure 19 shows a typical connection diagram for Channel V1.
A shunt is the current sensor selected for this example because
of its low cost compared to other current sensors such as the
current transformer (CT). This IC is ideal for low current
meters.
V1P
V1N
CF
RF
±30mV
SHUNT
AGND
PHASE
NEUTRAL
05330-009
Figure 19. Typical Connection for Channel V1
Figure 20 shows a typical connection for Channel V2. Typically,
the ADE7757A is biased around the phase wire, and a resistor
divider is used to provide a voltage signal that is proportional to
the line voltage. Adjusting the ratio of RA, RB, and RF is also a
convenient way of carrying out a gain calibration on a meter.
V2P
V2N
CF
PHASE
NEUTRAL
RF
±165mV
CF
RF
RB
RA*
*RA >> RB + RF
05330-010
Figure 20. Typical Connections for Channel V2
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相關代理商/技術參數 |
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|---|---|
| ADE7757ARN | 制造商:Rochester Electronics LLC 功能描述:ENERGY METER IC W/INTEGRATED OSCILLATOR - Bulk 制造商:Analog Devices 功能描述:IC ENERGY METER |
| ADE7757ARN-REF | 制造商:Analog Devices 功能描述:REF BOARD ENERGY MTR W/INTGRATED OSCIL. - Rail/Tube |
| ADE7757ARNRL | 制造商:Analog Devices 功能描述:IC ENERGY METERING 16-SOIC TR |
| ADE7757ARNZ | 功能描述:IC ENERGY METERING 1PHASE 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測量 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:* |
| ADE7757ARNZRL | 功能描述:IC ENERGY METERING 1PHASE 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測量 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:* |
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