参数资料
| 型号： | EVAL-ADE7759EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/36页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR ADE7759 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电度表/功率表 |
| 已用 IC / 零件： | ADE7759 |
| 已供物品： | 板 |
| 相关产品： | ADE7759ARSZRL-ND - IC ENERGY METERING 1PHASE 20SSOP ADE7759ARSZ-ND - IC ENERGY METERING 1PHASE 20SSOP |
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a
FEATURES
High Accuracy, Supports IEC 687/1036
On-Chip Digital Integrator Allows Direct Interface with
Current Sensors with di/dt Output Such as Rogowski Coil
Less Than 0.1% Error over a Dynamic Range of 1000 to 1
On-Chip User-Programmable Threshold for Line Voltage
SAG Detection and PSU Supervisory
Supplies Sampled Waveform Data and Active Energy
(40 Bits)
Digital Power, Phase, and Input DC Offset Calibration
On-Chip Temperature Sensor (Typical 1 LSB/ C Resolution)
SPI Compatible Serial Interface
Pulse Output with Programmable Frequency
Interrupt Request Pin (IRQ) and IRQ Status Register
Proprietary ADCs and DSP provide High Accuracy over
Large Variations in Environmental Conditions and Time
Active Energy Metering IC with
di/dt Sensor Interface
ADE7759 *
can be switched off if the ADE7759 is used with conventional
current sensors.
The ADE7759 contains a sampled waveform register and an
active energy register capable of holding at least 11.53 seconds
of accumulated power at full ac load. Data is read from the
ADE7759 via the serial interface. The ADE7759 also provides a
pulse output (CF) with frequency that is proportional to the
active power.
In addition to active power information, the ADE7759 also
provides various system calibration features, i.e., channel offset
correction, phase calibration, and power offset correction. The
part also incorporates a detection circuit for short duration
voltage drop (SAG). The voltage threshold and the duration (in
number of half-line cycles) of the drop are user programmable.
An open-drain logic output ( SAG ) goes active low when a sag
Reference 2.4 V
8% (20 ppm/ C Typical) with External
event occurs.
Overdrive Capability
Single 5 V Supply, Low Power Consumption (25 mW
Typical)
GENERAL DESCRIPTION
The ADE7759 is an accurate active power and energy measure-
ment IC with a serial interface and a pulse output. The ADE7759
incorporates two second-order Σ - ? ADCs, a digital integrator
(on CH1), reference circuitry, temperature sensor, and all the
signal processing required to perform active power and energy
measurement.
An on-chip digital integrator allows direct interface to di/dt
current sensors such as a Rogowski coil. The digital integrator
eliminates the need for an external analog integrator and pro-
vides excellent long-term stability and precise phase matching
between the current and the voltage channels. The integrator
A zero crossing output (ZX) produces an output that is synchro-
nized to the zero crossing point of the line voltage. This output
can be used to extract timing or frequency information from the
line. The signal is also used internally to the chip in the line
cycle energy accumulation mode; i.e., the number of half-line
cycles in which the energy accumulation occurs can be con-
trolled. Line cycle energy accumulation enables a faster and
more precise energy accumulation and is especially useful dur-
ing calibration. This signal is also useful for synchronization of
relay switching with a voltage zero crossing.
The interrupt request output is an open drain, active low logic
output. 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. The ADE7759 is available
in a 20-lead SSOP package.
FUNCTIONAL BLOCK DIAGRAM
AV DD
RESET
DV DD
DGND
V1P
V1N
ADC
MULTIPLIER
INTEGRATOR MULTIPLIER
dt
ADE7759
LPF2
ZX
SAG
HPF1
TEMP
APGAIN[11:0]
APOS[15:0]
SENSOR
PHCAL[7:0]
V2P
V2N
ADC
DFC
2.4V
REFERENCE
4k
REGISTERS AND
SERIAL INTERFACE
CFNUM[11:0]
CFDEN[11:0]
CF
LPF1
AGND
REF IN/OUT
DIN DOUT SCLK
CS
IRQ
CLKIN CLKOUT
* U.S. Patents 5,745,323; 5,760,617; 5,862,069; 5,872,469.
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. 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 companies.
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 ? 2002 Analog Devices, Inc. All rights reserved.
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