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參數(shù)資料
| 型號： | AD7751 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Energy Metering IC with On-Chip Fault Detection(高精度容錯電子能量測量芯片) |
| 中文描述： | 電能計量IC片故障檢測（高精度容錯電子能量測量芯片） |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 287K |
| 代理商： | AD7751 |
PRELIMINARY TECHNICAL DATA
AD7751
7
PRELIM B1 10/98
PIN CONFIGURATION
DIP & SSOP PACKAGES
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
F1
F2
CF
DGND
REVP
FAULT
CLKOUT
CLKIN
SCF
S0
S1
RESET
AD7751
TOP VIEW
(Not to Scale)
AGND
G0
DVDD
AVDD
AC/DC
V1A
V1B
V1N
V2N
V2P
G1
REF
IN/OUT
11
12
24
23
22
21
Pin No.
MNEMONIC
DESCRIPTION
15,16
G1, G0
These logic inputs are used to select one of four possible gains for the analog inputs V1A and
V1B. The possible gains are 1, 2, 8 and 16. See Analog Input section.
17
CLKIN
An external clock can be provided at this logic input. Alternatively a crystal can be connected
across CLKIN and CLKOUT to provide a clock source for the AD7751. The clock frequency
for specified operation is 3.58MHz. Crystal load capacitors of 33pF ceramic should be used the
with gate oscillator circuit.
18
CLKOUT
A crystal can be connected across this pin and CLKIN as described above to provide a clock
source for the AD7751. The CLKOUT pin can drive one CMOS load when an external clock
is supplied at CLKIN.
19
FAULT
This logic output will go active high when a fault condition occurs. A fault is defined as a
condition under which the signals on V1A and V1B differ by more than 12.5%. See Fault
Detection. The logic output will be reset to zero when a fault condition is no longer detected.
20
REVP
This logic output will go logic high when negative power is detected, i.e. when the voltage and
current signals at 180° out of phase. 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 output
on F1 and F2.
21
DGND
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 digital 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 connected to the digital ground plane at the DGND pin.
22
CF
Calibration Frequency logic output. The CF logic output gives instantaneous real power
information. This output is intended to be used for calibration purposes. Also see SCF pin
description.
23, 24
F2, F1
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 AD7751 Transfer Function.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7751AAN | 制造商:Analog Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述:PRODUCT TO FREQUENCY CONV - Bulk |
| 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 |
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