參數(shù)資料
型號(hào): ADE7752BARW
廠商: ANALOG DEVICES INC
元件分類: 模擬信號(hào)調(diào)理
英文描述: Polyphase Energy Metering IC with Pulsed Output
中文描述: SPECIALTY ANALOG CIRCUIT, PDSO24
封裝: MS-013AD, SOIC-24
文件頁(yè)數(shù): 1/27頁(yè)
文件大?。?/td> 342K
代理商: ADE7752BARW
Polyphase Energy Metering IC with Pulsed
Output
Preliminary Technical Data
ADE7752B
FEATURES
High accuracy supports 50 Hz/60 Hz IEC62053-21
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
Supplies average active power on the frequency outputs F1 and F2
High frequency output (CF) is intended for calibration and
supplies instantaneous active power
Logic output REVP indicates a potential miswiring or negative
power on the sum of all phases
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) based on the sum
of the three phases
On-chip reference 2.4 V ± 8% (25 ppm/°C typical) with external
overdrive capability
Single 5 V supply, low power (TBD mW typical)
Low cost CMOS process
GENERAL DESCRIPTION
The ADE7752B
1
is an accurate active energy measurement IC
intended for use in any 3-phase distribution system and has
enhanced features that make it better suited for 3-phase 3-wire
applications compared to the ADE7752/52A.
Rev. PrA
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements 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.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2006 Analog Devices, Inc. All rights reserved.
www.analog.com
The no-load threshold and reverse polarity indication are based
on the sum of the three phase energies in the ADE7752B. The
ADE7752B specifications surpass the accuracy requirements as
quoted in the IEC62053-21 standard.
The only analog circuitry used in the ADE7752B is in the
analog-to-digital converters (ADCs) and reference circuit. All
other signal processing (for example, multiplication, 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 ADE7752B supplies average active power information on
the low frequency outputs, F1 and F2. These logic outputs can
be used to directly drive an electromechanical counter or to
interface with an MCU. The CF logic output gives
instantaneous active power information. This output is
intended to be used for calibration purposes.
The ADE7752B includes a power supply monitoring circuit on
the V
DD
pin. The ADE7752B remains inactive until the supply
voltage on V
DD
reaches 4 V. If the supply falls below 4 V, the
ADE7752B also resets and 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 ADE7752B does not exhibit any creep
when there is no load.
The ADE7752B is available in a 24-lead SOIC package.
1
Patent pending.
FUNCTIONAL BLOCK DIAGRAM
ABS
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
REF
IN/OUT
AGND
4k
Ω
IBP
IBN
VBP
VN
ICP
ICN
VCP
IAP
IAN
VAP
ADC
ADC
ADC
ADC
V
DD
ADE7752B
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
Σ
X
X
X
0
Figure 1.
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