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ADE7763 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADE7763
Beschreibung Single-Phase Active and Apparent Energy Metering IC
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 30 Seiten
ADE7763 Datasheet, Funktion
www.DataSheet4U.com
Single-Phase Active and Apparent
Energy Metering IC
ADE7763
FEATURES
High accuracy; supports IEC 61036/60687, IEC62053-21, and
IEC62053-22
On-chip digital integrator enables direct interface-to-current
sensors with di/dt output
A PGA in the current channel allows direct interface to
shunts and current transformers
Active and apparent energy, sampled waveform, and current
and voltage rms
Less than 0.1% error in active energy measurement over a
dynamic range of 1000 to 1 at 25°C
Positive-only energy accumulation mode available
On-chip user programmable threshold for line voltage surge
and SAG and PSU supervisory
Digital calibration for power, phase, and input offset
On-chip temperature sensor (±3°C typical)
SPI®-compatible serial interface
Pulse output with programmable frequency
Interrupt request pin (IRQ) and status register
Reference 2.4 V with external overdrive capability
Single 5 V supply, low power (25 mW typical)
GENERAL DESCRIPTION
The ADE77631 features proprietary ADCs and fixed function
DSP for high accuracy over large variations in environmental
conditions and time. The ADE7763 incorporates two second-
order, 16-bit Σ-∆ ADCs, a digital integrator (on Ch1), reference
circuitry, a temperature sensor, and all the signal processing
required to perform active and apparent energy measurements,
line-voltage period measurements, and rms calculation on the
voltage and current channels. The selectable on-chip digital
integrator provides direct interface to di/dt current sensors such
as Rogowski coils, eliminating the need for an external analog
integrator and resulting in excellent long-term stability and
precise phase matching between the current and the voltage
channels.
The ADE7763 provides a serial interface to read data and a
pulse output frequency (CF) that is proportional to the active
power. Various system calibration features such as channel
offset correction, phase calibration, and power calibration
ensure high accuracy. The part also detects short duration, low
or high voltage variations.
The positive-only accumulation mode gives the option to
accumulate energy only when positive power is detected. An
internal no-load threshold ensures that the part does not exhibit
any creep when there is no load. The zero-crossing output (ZX)
produces a pulse that is synchronized to the zero-crossing point
of the line voltage. This signal is used internally in the line cycle
active and apparent energy accumulation modes, which enables
faster calibration.
The interrupt status register indicates the nature of the interrupt,
and the interrupt enable register controls which event produces
an output on the IRQ pin, an open-drain, active low logic output.
The ADE7763 is available in a 20-lead SSOP package.
FUNCTIONAL BLOCK DIAGRAM
AVDD
PGA
V1P
ADC
V1N
TEMP
SENSOR
RESET
DVDD DGND
INTEGRATOR
MULTIPLIER
dt
LPF2
WGAIN[11:0]
HPF1
IRMSOS[11:0]
APOS[15:0]
ADE7763
CFNUM[11:0]
PGA
V2P
V2N
ADC
Φ

PHCAL[5:0] LPF1
2.4V
4k
REFERENCE
x2
VRMSOS[11:0]
x2
VAGAIN[11:0]
DFC
CF
CFDEN[11:0]
VADIV[7:0]
%%
WDIV[7:0]
REGISTERS AND
SERIAL INTERFACE
ZX
SAG
AGND
REFIN/OUT
CLKIN CLKOUT
DIN DOUT SCLK CS IRQ
1U.S. Patents 5,745,323; 5,760,617; 5,862,069; 5,872,469; others pending.
Figure 1.
Rev. A
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.






ADE7763 Datasheet, Funktion
ADE7763
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3.
Parameter
AVDD to AGND
DVDD to DGND
DVDD to AVDD
Analog Input Voltage to AGND
V1P, V1N, V2P, and V2N
Reference Input Voltage to AGND
Digital Input Voltage to DGND
Digital Output Voltage to DGND
Operating Temperature Range
Industrial
Storage Temperature Range
Junction Temperature
20-Lead SSOP, Power Dissipation
θJA Thermal Impedance
Lead Temperature, Soldering
Vapor Phase (60 s)
Infrared (15 s)
Rating
–0.3 V to +7 V
–0.3 V to +7 V
–0.3 V to +0.3 V
–6 V to +6 V
–0.3 V to AVDD + 0.3 V
–0.3 V to DVDD + 0.3 V
–0.3 V to DVDD + 0.3 V
–40°C to +85°C
–65°C to +150°C
150°C
450 mW
112°C/W
215°C
220°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only, and functional operation of the device at these or
any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
Rev. A | Page 6 of 56

6 Page









ADE7763 pdf, datenblatt
ADE7763
0.5
GAIN = 8
0.4 INTEGRATOR ON
INTERNAL REFERENCE
0.3 5.25V
0.2
0.1
5.00V
0
–0.1
–0.2 4.75V
–0.3
–0.4
–0.5
0.1
1 10
FULL-SCALE CURRENT (%)
100
Figure 18. Active Energy Error as a Percentage of Reading (Gain = 8)
over Power Supply with Internal Reference and Integrator On
0.5
GAIN = 8
0.4 INTEGRATOR ON
INTERNAL REFERENCE
0.3
0.2
0.1 PF = 0.5
0
–0.1 PF = 1
–0.2
–0.3
–0.4
–0.5
0.1
1 10
FULL-SCALE CURRENT (%)
100
Figure 19. IRMS Error as a Percentage of Reading (Gain = 8)
with Internal Reference and Integrator On
16
14
12
10
8
6
4
2
0
–15
–10 –5
0
5 10
CH1 OFFSET (0p5V_1X) (mV)
15
Figure 20. Channel 1 Offset (Gain = 1)
20
VDD
I
10µF
100nF
100nF
10µF
di/dt CURRENT
SENSOR
1001k
33nF 33nF
1001k
33nF 33nF
110V
1k33nF
600k
1k33nF
10µF 100nF
CHANNEL 1 GAIN = 8
CHANNEL 2 GAIN = 1
AVDD DVDD RESET
DIN
V1P
DOUT
SCLK
V1N U1
ADE7763 CS
CLKOUT
V2N
CLKIN
V2P
REFIN/OUT
IRQ
SAG
ZX
CF
AGND DGND
TO SPI BUS
(USED ONLY FOR
CALIBRATION)
Y1
3.58MHz
22pF
22pF
NOT CONNECTED
U3
TO
FREQUENCY
COUNTER
PS2501-1
Figure 21. Test Circuit for Performance Curves with Integrator On
VDD
I
10µF
100nF
100nF
10µF
CURRENT
TRANSFORMER
1k
33nF
RB
1k
33nF
110V
1k33nF
600k
1k33nF
10µF
100nF
CT TURN RATIO = 1800:1
CHANNEL 2 GAIN = 1
GAIN 1 (CH1) RB
1 10
8 1.21
AVDD DVDD RESET
DIN
V1P
DOUT
SCLK
V1N U1
ADE7763 CS
CLKOUT
V2N
CLKIN
V2P
REFIN/OUT
IRQ
SAG
ZX
CF
AGND DGND
TO SPI BUS
(USED ONLY FOR
CALIBRATION)
Y1
3.58MHz
22pF
22pF
NOT CONNECTED
U3
TO
FREQUENCY
COUNTER
PS2501-1
Figure 22. Test Circuit for Performance Curves with Integrator Off
Rev. A | Page 12 of 56

12 Page





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