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ADE7756EB 데이터시트(PDF) 1 Page - Analog Devices |
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ADE7756EB 데이터시트(HTML) 1 Page - Analog Devices |
1 / 15 page One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 REV. PrB 01/01 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. = EvaluationBoardDocumentation AD7756EnergymeteringIC EVAL-ADE7756EB FEATURES Evaluation Board is designed to be used together with accompanying software to implement a fully functional Energy Meter (Watt-Hour Meter). Easy connection of various external transducers via screw terminals. Easy modification of signal conditioning components using PCB sockets. LED indicators on logic outputs CF, ZX, SAG and IRQ. Optically isolated data output connection to PC parallel port. Optically isolated frequency output (CF) to BNC. External Reference option available for on-chip reference evaluation. PreliminaryTechnicalData FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION GENERAL DESCRIPTION GENERAL DESCRIPTION GENERAL DESCRIPTION GENERAL DESCRIPTION The ADE7756 is a high accuracy electrical power mea- surement IC with a serial interface and a pulse output. The ADE7756 incorporates two second order sigma delta ADCs, reference circuitry, temperature sensor and all the signal processing required to perform active power and energy measurement. This documentation describes the ADE7756 evaluation kit Hardware and Software functionality. The ADE7756 evaluation board, together with the ADE7756 data sheet and this documentation provides a complete evaluation platform for the ADE7756. The evaluation board has been designed so that the ADE7756 can be evaluated in the end application, i.e., Watt-Hour Meter. Using the appropriate transducers on the current channel (e.g., shunt, CT etc.) the evaluation board can be connected to a test bench or high voltage (240V rms) test circuit. An on-board resistor divider network provides the attenuation for the line voltage. This application note also describes how the current transducers should be connected for the best performance. The evaluation board (watt-hour meter) is configured and calibrated via the parallel port of a PC. The data interface between the evaluation board and the PC is fully isolated. Windows TM based software is provided with the evaluation board which allows it to be quickly configured as an energy meter. The evaluation board also functions as a stand alone evaluation system which can be easily incorporated into an existing system via a 25 way D-Sub connector. The evaluation board requires two external 5V power supplies (one is required for isolation purposes) and the appropriate current transducer. AD780 ADE7756 V+ AVDD AGND DVDD DGND V1P V1N V2N V2P +5V PROTOTYPE AREA V- AGND Filter Network Filter Network & Attenuation 74HC08 74HC08 DOUT SCLK DIN CS RESET CF ZX SAG IRQ Connector to PC Parallel Port BNC BNC External Clock in CF Isolated Frequency output Optional External 2.5V Reference PRELIMINARYTECHNICALDATA |
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