Single-Phase Active and Apparent
Energy Metering IC
ADE7763
Data Sheet
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.
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
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.
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 interrupt status register indicates the nature of the interrupt,
and the interrupt enable register controls which event produces
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
an output on the
pin, an open-drain, active low logic output.
IRQ
The ADE7763 is available in a 20-lead SSOP package.
FUNCTIONAL BLOCK DIAGRAM
AVDD
DVDD
DGND
RESET
INTEGRATOR
WGAIN[11:0]
PGA
ADE7763
MULTIPLIER LPF2
V1P
V1N
dt
ADC
HPF1
TEMP
SENSOR
APOS[15:0]
CFNUM[11:0]
IRMSOS[11:0]
LPF3
DFC
CF
VAGAIN[11:0]
2
x
PGA
VRMSOS[11:0]
LPF3
CFDEN[11:0]
V2P
V2N
Φ
|x|
ADC
VADIV[7:0]
%
%
WDIV[7:0]
PHCAL[5:0] LPF1
ZX
SAG
4kΩ
REGISTERS AND
SERIAL INTERFACE
2.4V
REFERENCE
AGND
REF
CLKIN CLKOUT
DIN DOUT SCLK
CS IRQ
IN/OUT
Figure 1.
1 U.S. Patents 5,745,323; 5,760,617; 5,862,069; 5,872,469.
Rev. C
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rightsof third parties that may result fromits 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 andregisteredtrademarks are the property of their respective owners.
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Tel: 781.329.4700 ©2004–2013 Analog Devices, Inc. All rights reserved.
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