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ADE7753 数据表(PDF) 1 Page - Analog Devices |
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ADE7753 数据表(HTML) 1 Page - Analog Devices |
1 / 60 page Single-Phase Multifunction Metering IC with di/dt Sensor Interface ADE7753 Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2003–2010 Analog Devices, Inc. All rights reserved. FEATURES High accuracy; supports IEC 60687/61036/61268 and IEC 62053-21/62053-22/62053-23 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, reactive, and apparent energy; sampled waveform; 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 ADE77531 features proprietary ADCs and DSP for high accuracy over large variations in environmental conditions and time. The ADE7753 incorporates two second-order 16-bit -Δ ADCs, a digital integrator (on CH1), reference circuitry, temperature sensor, and all the signal processing required to perform active, reactive, and apparent energy measurements, line-voltage period measurement, and rms calculation on the voltage and current. 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 pre- cise phase matching between the current and voltage channels. The ADE7753 provides a serial interface to read data, and a pulse output frequency (CF), which is proportional to the active power. Various system calibration features, i.e., 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 ADE7753 is available in a 20-lead SSOP package. FUNCTIONAL BLOCK DIAGRAM AVDD RESET DVDD DGND TEMP SENSOR ADC ADC DFC x2 ADE7753 LPF2 MULTIPLIER INTEGRATOR CLKIN CLKOUT DIN DOUT SCLK REFIN/OUT CS IRQ AGND APOS[15:0] VAGAIN[11:0] VADIV[7:0] IRMSOS[11:0] VRMSOS[11:0] WGAIN[11:0] dt REGISTERS AND SERIAL INTERFACE CFNUM[11:0] CFDEN[11:0] 2.4V REFERENCE 4k PHCAL[5:0] HPF1 LPF1 02875-A-001 V1P V1N V2N V2P PGA PGA ZX SAG CF WDIV[7:0] % % 2 |x| Figure 1. 1U.S. Patents 5,745,323; 5,760,617; 5,862,069; 5,872,469. |
类似零件编号 - ADE7753_15 |
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类似说明 - ADE7753_15 |
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