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ADE7753ARS датащи(PDF) 1 Page - Analog Devices |
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ADE7753ARS датащи(HTML) 1 Page - Analog Devices |
1 / 37 page 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 © Analog Devices, Inc., 2002 REV. PrF 10/02 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Active and Apparent Energy Metering IC with di/dt sensor interface ADE7753* FEATURES High Accuracy, supports IEC 61036 and IEC61268 On-Chip Digital Integrator enables direct interface with current sensors with di/dt output The ADE7753 supplies Active, Reactive and Apparent Energy, Sampled Waveform, Current and Voltage RMS Less than 0.1% error over a dynamic range of 1000 to 1 Positive only energy accumulation mode available An On-Chip user Programmable threshold for line voltage surge and SAG, and PSU supervisory Digital Power, Phase & Input Offset Calibration An On-Chip temperature sensor (±3°C typical) A SPI compatible Serial Interface A pulse output with programmable frequency An Interrupt Request pin (IRQ) and Status register Proprietary ADCs and DSP provide high accuracy data over large variations in environmental conditions and time Reference 2.4V±8% (20 ppm/°C typical) with external overdrive capability Single 5V Supply, Low power (25mW typical) FUNCTIONAL BLOCK DIAGRAM *U.S. Patents 5,745,323; 5,760,617; 5,862,069; 5,872,469; others Pending. precise phase matching between the current and voltage channels. The integrator can be switched on and off based on the current sensor selected. The ADE7753 contains an Active Energy register. It is capable of holding more than 200 seconds of accumulated power at full load. Data is read from the ADE7753 via the serial interface. The ADE7753 also provides a pulse output (CF) with output frequency is proportional to the active power. In addition to rms calculation and active and apparent power information, the ADE7753 also accumulates the signed reactive energy. The ADE7753 also provides various system calibration features, i.e., channel offset correction, phase calibration and power calibration. The part also incorporates a detection circuit for short duration low or high voltage variations. The ADE7753 has a positive only accumulation mode which 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. A zero crossing output (ZX) produces an output which is synchronized to the zero crossing point of the line voltage. This information is used in the ADE7753 to measure the line's period. The signal is also used internally to the chip in the line cycle Active and Apparent energy accumulation mode. This enables a faster and more precise energy accumu- lation and is useful during 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 ADE7753 is available in 20-lead SSOP package. : DVDD HPF LPF2 DGND CLKOUT V1P V1N + - + - V2P V2N 2.4V REFERENCE ADC AVDD PGA CLKIN REF IN/OUT CF RESET AGND 4k Ω Φ PHCAL[5:0] MULTIPLIER Σ APOS[15:0] DIN DOUT SCLK CS SAG ZX IRQ ADE7753 REGISTERS & SERIAL INTERFACE ADE7753 TEMP SENSOR LPF1 INTEGRATOR dt VRMSOS[11:0] IRMSOS[11:0] Σ Σ WGAIN[11:0] WDIV[7:0] CFNUM[11:0] CFDEN[11:0] DFC VAGAIN[11:0] VADIV[7:0] : PGA ADC PRELIMINARY TECHNICAL DATA PreliminaryTechnicalData GENERAL DESCRIPTION The ADE7753 is an accurate active and apparent energy measurements IC with a serial interface and a pulse output. The ADE7753 incorporates two second order sigma delta ADCs, a digital integrator (on CH1), reference circuitry, temperature sensor, and all the signal processing required to perform RMS calculation on the voltage and current, active, reactive, and apparent energy measurement. An on-chip digital integrator provides direct interface to di/ dt current sensors such as Rogowski coils. The digital integrator eliminates the need for external analog integrator, and this solution provides excellent long-term stability and a |
Аналогичный номер детали - ADE7753ARS |
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Аналогичное описание - ADE7753ARS |
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