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參數資料
| 型號： | AD7751AAN |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | Energy Metering IC With On-Chip Fault Detection |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDIP24 |
| 封裝： | PLASTIC, DIP-24 |
| 文件頁數： | 6/16頁 |
| 文件大小： | 249K |
| 代理商： | AD7751AAN |
REV. A
AD7751
–6–
Pin No.
Mnemonic
Description
20
REVP
This logic output will go logic high when negative power is detected, i.e., when the phase angle
between the voltage and current signals is greater that 90
°
. This output is not latched and will be
reset when positive power is once again detected. The output will go high or low at the same time as
a pulse is issued on CF.
This provides the ground reference for the digital circuitry in the AD7751, i.e., multiplier, filters
and digital-to-frequency converter. This pin should be tied to the analog ground plane of the PCB.
The digital ground plane is the ground reference for all digital circuitry, e.g., counters (mechanical
and digital), MCUs and indicator LEDs. For good noise suppression the analog ground plane
should only be connected to the digital ground plane at one point, e.g., a star ground.
Calibration Frequency Logic Output. The CF logic output gives
instantaneous real power
informa-
tion. This output is intended to be used for calibration purposes. Also see SCF pin description.
Low Frequency Logic Outputs. F1 and F2 supply
average real power
information. The logic outputs
can be used to directly drive electromechanical counters and two-phase stepper motors. See Transfer
Function section.
21
DGND
22
CF
23, 24
F2, F1
PIN CONFIGURATION
DIP and SSOP Packages
TOP VIEW
(Not to Scale)
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
AD7751
SCF
AGND
REF
IN/OUT
RESET
V2P
DV
DD
AC/
DC
AV
DD
V1A
V2N
V1N
V1B
S1
S0
G1
G0
CLKIN
F1
F2
CF
DGND
CLKOUT
FAULT
REVP
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|---|---|
| AD7751AARS | Energy Metering IC With On-Chip Fault Detection |
| AD7755AAN-REF | GT 7C 7#8 SKT RECP |
| AD7755AARS | Energy Metering IC with Pulse Output |
| AD7755ABRS | Energy Metering IC with Pulse Output |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7751AAN-REF | 制造商:Analog Devices 功能描述: |
| AD7751AARS | 制造商:Rochester Electronics LLC 功能描述:PRODUCT TO FREQUENCY CONV - Bulk |
| AD7751ABRS | 制造商:AD 制造商全稱:Analog Devices 功能描述:Energy Metering IC With On-Chip Fault Detection |
| AD7751AN | 制造商:Rochester Electronics LLC 功能描述:PRODUCT TO FREQUENCY CONV - Bulk |
| AD7751ARS | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
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