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Analog Devices에서 제조한 전자 부품 ADE7760은 전자 산업 및 응용 분야에서
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기능 Energy Metering IC
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ADE7760 데이터시트, 핀배열, 회로
www.DataSheet4U.com
FEATURES
High accuracy active energy measurement IC, supports
IEC 687/61036
Less than 0.1% error over a dynamic range of 500 to 1
Supplies active power on the frequency outputs F1 and F2
High frequency output CF is intended for calibration and
supplies instantaneous active power
Continuous monitoring of the phase and neutral current
allows fault detection in 2-wire distribution systems
Current channels input level best suited for current
transformer sensors
Uses the larger of the two currents (phase or neutral) to
bill—even during a fault condition
Two logic outputs (FAULT and REVP) can be used to indicate
a potential miswiring or fault condition
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
Reference 2.5 V ± 8% (drift 30 ppm/°C typical) with external
overdrive capability
Single 5 V supply, low power
Energy Metering IC with
On-Chip Fault Detection
ADE7760
GENERAL DESCRIPTION
The ADE7760 is a high accuracy, fault tolerant, electrical energy
measurement IC intended for use with 2-wire distribution
systems. The part specifications surpass the accuracy require-
ments as quoted in the IEC61036 standard.
The only analog circuitry used on the ADE7760 is in the ADCs
and reference circuit. All other signal processing (such as multi-
plication and filtering) is carried out in the digital domain. This
approach provides superior stability and accuracy over extremes
in environmental conditions and over time.
The ADE7760 incorporates a fault detection scheme similar to
the ADE7751 by continuously monitoring both the phase and
neutral currents. A fault is indicated when these currents differ
by more than 6.25%.
The ADE7760 supplies average active power information on the
low frequency outputs F1 and F2. The CF logic output gives
instantaneous active power information.
The ADE7760 includes a power supply monitoring circuit on
the VDD supply pin. Internal phase-matching circuitry ensures
that the voltage and current channels are matched. An internal
no-load threshold ensures that the ADE7760 does not exhibit
any creep when there is no load.
V1A 2
V1N 4
V1B 3
V2P 6
V2N 5
AGND
8
FUNCTIONAL BLOCK DIAGRAM
FAULT
15
VDD
1
POWER
SUPPLY MONITOR
ADE7760
SIGNAL PROCESSING BLOCK
ADC
A>B
HPF
ADC
B>A
A<>B
ADC
LPF
2.5V
4k
REFERENCE
INTERNAL
OSCILLATOR
DIGITAL-TO-FREQUENCY CONVERTER
9
REFIN/OUT
14
RCLKIN
17
DGND
10 11 12 16 18 19 20
SCF S1 S0 REVP CF F2 F1
Figure 1.
Rev. 0
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
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.




ADE7760 pdf, 반도체, 판매, 대치품
ADE7760
Parameter
LOGIC OUTPUTS4
CF, REVP, and FAULT
Output High Voltage, VOH
Output Low Voltage, VOH
F1 and F2
Output High Voltage, VOH
Output Low Voltage, VOH
POWER SUPPLY
VDD
VDD
Value Unit
4 V, min
1 V, max
4 V, min
1 V, max
4.75 V, min
5.25 V, max
4 mA, max
Test Conditions/Comments
VDD = 5 V ± 5%
VDD = 5 V ± 5%
VDD = 5 V ± 5%, Isource = 10 mA
VDD = 5 V ± 5%, Isink = 10 mA
For specified performance
5 V – 5%
5 V + 5%
1 See plots in the Typical Performance Characteristics section.
2 See the Terminology section for explanation of specifications.
3 See the Fault Detection section for explanation of fault detection functionality.
4 Sample tested during initial release and after any redesign or process change that may affect this parameter.
Rev. 0 | Page 4 of 24

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ADE7760 전자부품, 판매, 대치품
TERMINOLOGY
Measurement Error
The error associated with the energy measurement made by the
ADE7760 is defined by the following formula:
Percentage Error =
⎜⎛
⎜⎝
Energy
registered by ADE7760
True Energy
True
Energy
×100%
⎟⎞
⎟⎠
Phase Error between Channels
The high-pass filter (HPF) in the current channel has a phase
lead response. To offset this phase response and equalize the
phase response between channels, a phase correction network is
also placed in the current channel. The phase correction net-
work ensures a phase match between the current channels and
voltage channels to within ±0.1° over a range of 45 Hz to 65 Hz
and ±0.2° over a range 40 Hz to 1 kHz.
Power Supply Rejection
This quantifies the ADE7760 measurement error as a percent-
age of reading when the power supplies are varied. For the ac
PSR measurement, a reading at nominal supplies (5 V) is taken.
A second reading is obtained with the same input signal levels
when an ac (175 mV rms/100 Hz) signal is introduced onto the
supplies. Any error introduced by this ac signal is expressed as a
percentage of reading (see the Measurement Error definition
above).
ADE7760
For the dc PSR measurement, a reading at nominal supplies
(5 V) is taken. A second reading is obtained with the same input
signal levels when the power supplies are varied ±5%. Any error
introduced is again expressed as a percentage of reading.
ADC Offset Error
This refers to the dc offset associated with the analog inputs to
the ADCs. It means that with the analog inputs connected to
AGND the ADCs still see a dc analog input signal. The magni-
tude of the offset depends on the input range selection (see the
Typical Performance Characteristics section). However, when
HPFs are switched on, the offset is removed from the current
channels and the power calculation is not affected by this offset.
Gain Error
The gain error in the ADE7760 ADCs is defined as the differ-
ence between the measured output frequency (minus the offset)
and the ideal output frequency. The difference is expressed as a
percentage of the ideal frequency. The ideal frequency is
obtained from the transfer function (see the Transfer Function
section).
Rev. 0 | Page 7 of 24

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