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AD71056AR-RL 数据表(PDF) 1 Page - Analog Devices |
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AD71056AR-RL 数据表(HTML) 1 Page - Analog Devices |
1 / 20 page Energy Metering IC with Integrated Oscillator and Reverse Polarity Indication AD71056 Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other 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 ©2006 Analog Devices, Inc. All rights reserved. FEATURES On-chip oscillator as clock source High accuracy, supports 50 Hz/60 Hz IEC62053-21 Less than 0.1% error over a dynamic range of 500 to 1 Supplies average real power on frequency outputs (F1, F2) High frequency output (CF) calibrates and supplies instantaneous real power Logic output (REVP) indicates potential miswiring or negative power Direct drive for electromechanical counters and 2-phase stepper motors (F1, F2) Proprietary ADCs and DSP provide high accuracy over large variations in environmental conditions and time On-chip power supply monitoring On-chip creep protection (no load threshold) On-chip reference 2.45 V (20 ppm/°C typical) with external overdrive capability Single 5 V supply, low power (20 mW typical) Low cost CMOS process GENERAL DESCRIPTION The AD710561 is a high accuracy, electrical energy metering IC with a precise oscillator circuit that serves as a clock source to the chip. The AD71056 eliminates the need for an external crystal or resonator, thus reducing the overall cost of building a meter with this IC. The chip directly interfaces with the shunt resistor. The AD71056 specifications surpass the accuracy requirements as quoted in the IEC62053-21 standard. The only analog circuitry used in the AD71056 is in the Σ-Δ ADCs and reference circuit. All other signal processing, such as multiplication and filtering, is carried out in the digital domain. This approach provides superior stability and accuracy over time and in extreme environmental conditions. The AD71056 supplies average real power information on F1 and F2, the low frequency outputs. These outputs either directly drive an electromechanical counter or interface with an MCU. The high frequency CF logic output, ideal for calibration purposes, provides instantaneous real power information. The AD71056 includes a power supply monitoring circuit on the VDD supply pin. The AD71056 remains inactive until the supply voltage on VDD reaches approximately 4 V. If the supply falls below 4 V, the AD71056 also remains inactive and the F1, F2, and CF outputs are in their nonactive modes. Internal phase matching circuitry ensures that the voltage and current channels are phase matched, and the HPF in the current channel eliminates dc offsets. An internal no load threshold ensures that the AD71056 does not exhibit creep when no load is present. The part is available in a 16-lead, narrow body SOIC package. FUNCTIONAL BLOCK DIAGRAM MULTIPLIER REVP V2P V2N V1P RCLKIN REFIN/OUT F1 F2 CF SCF S0 S1 PHASE CORRECTION 4kΩ ...110101... SIGNAL PROCESSING BLOCK POWER SUPPLY MONITOR Σ-Δ ADC V1N AD71056 ...11011001... 2.5V REFERENCE VDD AGND DGND Ф INTERNAL OSCILLATOR Σ-Δ ADC LPF HPF + + 1 6 13 7 11 8 10 12 14 16 15 9 DIGITAL-TO-FREQUENCY CONVERTER 2 3 4 5 Figure 1. 1 U.S. Patents 5,745,323; 5,760,617; 5,862,069; 5,872,469; others pending. |
类似零件编号 - AD71056AR-RL |
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类似说明 - AD71056AR-RL |
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