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ADE7752A датащи(PDF) 1 Page - Analog Devices

номер детали ADE7752A
подробное описание детали  Polyphase Energy Metering IC with Pulse Output
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
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ADE7752A датащи(HTML) 1 Page - Analog Devices

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Polyphase Energy Metering IC
with Pulse Output
ADE7752/ADE7752A
FEATURES
High accuracy, supports 50 Hz/60 Hz IEC62053-2x
Less than 0.1% error over a dynamic range of 500 to 1
Compatible with 3-phase/3-wire delta and 3-phase/4-wire
Wye configurations
The ADE7752 supplies average real power on frequency
outputs F1 and F2
High frequency output CF is intended for calibration and
supplies instantaneous real power
Logic output REVP indicates a potential miswiring or
negative power for each phase
Direct drive for electromechanical counters and 2-phase
stepper motors (F1 and F2)
Proprietary ADCs and DSP provide high accuracy over large
variations in environmental conditions and time
On-chip power supply monitoring
On-chip creep protection (no load threshold)
On-chip reference 2.4 V ±8% (20 ppm/°C typical) with
external overdrive capability
Single 5 V supply, low power
60 mW typical: ADE7752
30 mW typical: ADE7752A
Low cost CMOS process
GENERAL DESCRIPTION
The ADE7752 is a high accuracy polyphase electrical energy
measurement IC. The ADE7752A is a pin-to-pin compatible
low power version of ADE7752. The functions of ADE7752 and
ADE7752A are the same. Both products are referred to in the
text of this data sheet as ADE7752.
The part specifications surpass the accuracy requirements as
quoted in the IEC62053-2x standard. The only analog circuitry
used in the ADE7752 is in the analog-to-digital converters (ADCs)
and reference circuit. All other signal processing (such as multi-
plication, filtering, and summation) is carried out in the digital
domain. This approach provides superior stability and accuracy
over extremes in environmental conditions and over time.
The ADE7752 supplies average real power information on the
low frequency outputs, F1 and F2. These logic outputs may be
used to directly drive an electromechanical counter or to
interface with an MCU. The CF logic output gives instanta-
neous real power information. This output is intended to be
used for calibration purposes.
The ADE7752 includes a power supply monitoring circuit on
the VDD pin. The ADE7752 remains inactive until the supply
voltage on VDD reaches 4 V. If the supply falls below 4 V, no
pulses are issued on F1, F2, and CF. Internal phase matching
circuitry ensures that the voltage and current channels are
phase matched. An internal no load threshold ensures the part
does not exhibit any creep when there is no load. The ADE7752
is available in a 24-lead SOIC package.
FUNCTIONAL BLOCK DIAGRAM
7
8
15
10
14
13
5
6
16
9
LPF
HPF
Φ
3
CLKOUT
CLKIN
DGND
CF
S1
F1
F2
S0
SCF
REVP
DIGITAL-TO-FREQUENCY CONVERTER
2.4V REF
REFIN/OUT
AGND
4k
Ω
IBP
IBN
VBP
VN
ICP
ICN
VCP
IAP
IAN
VAP
ADC
ADC
ADC
ADC
VDD
ADE7752/
ADE7752A
POWER
SUPPLY
MONITOR
ADC
ADC
PHASE
CORRECTION
PHASE
CORRECTION
PHASE
CORRECTION
11
12
4
18
21
22
23
24
1
20
19
2
17
HPF
Φ
HPF
Φ
LPF
LPF
ABS
Σ
X
X
X
Figure 1. 24-Lead Standard Small Outline Package [SOIC]
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice.
No license is granted by implication or otherwise under any patent or patent rights of Analog
Devices.Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
© 2005 Analog Devices, Inc. All rights reserved.


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Аналогичное описание - ADE7752A_15

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logo
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