Single Phase Multifunction Metering IC with Neutral Current Measurement
The ADE7953 is a high accuracy electrical energy measurement IC intended for single phase applications. It measures line voltage and current and calculates active, reactive, apparent energy and instantaneous RMS voltage and current.
The device incorporates three sigma delta ADCs with a high accuracy energy measurement core. The third input channel simultaneously measures neutral current and enables tamper detection and neutral current billing. The additional channel incorporates a complete signal path that allows a full range of measurements. Each input channel supports independent and flexible gain stages making the device suitable for use with a variety of current sensors such as current transformers (CT’s) and low value shunt resistors. Two on-chip integrators facilitate the use of Rogowski coil sensors.
The ADE7953 provides access to on-chip meter registers via a variety of communication interfaces including SPI, I2C or UART. Two configurable low -jitter pulse output pins provide outputs that are proportional to active, reactive or apparent energy as well as current and voltage RMS. A full range of power quality information such as overcurrent, overvoltage, peak and SAG detection are accessible via the external IRQ pin. Independent active, reactive and apparent no-load detections are included to prevent meter ‘creep’. Dedicated reverse power (REVP), zero crossing voltage (ZX) and zero crossing current (ZX-I) pins are also provided. The ADE7953 energy metering IC operates from a 3.3V supply voltage and is available in a 28 pin LFCSP package.
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
The ADE7953 evaluation kit includes two boards that should be used together to evaluate the silicon. The smaller board, named ADE IO INTERFACE BOARD Z (the interface board), consists of an NXP LPC2368FBD100 microcontroller that handles all communications from the PC to the ADE7953. The larger board, named EVAL-ADE7953EBZ (the evaluation board), includes the ADE7953 energy metering IC, associated filtering, and isolation to allow high voltage inputs to be used. The two boards should be connected together using the 25-pin connector included in the evaluation kit. The connector is labeled P2 on the interface board and P7 on the evaluation board.
Recommended Digital Isolators
Recommended External References
All-Electronic Power and Energy Meters
(Analog Dialogue, Vol. 33, No. 2, February, 1999)
Smart Metering Technology Promotes Energy Efficiency for a Greener World
Analog Dialogue, Volume 43 – January 2009
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.