Part # AD71056 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD71056 Energy Metering IC with Integrated Oscillator and Reverse Polarity Indication Data Sheet (Rev. A)

Part Details:

Energy Metering IC with Integrated Oscillator and Reverse Polarity Indication AD71056 FEATURES The AD71056 specifications surpass the accuracy requirements On-chip oscillator as clock source as quoted in the IEC62053-21 standard. High accuracy, supports 50 Hz/60 Hz IEC62053-21 The only analog circuitry used in the AD71056 is in the - Less than 0.1% error over a dynamic range of 500 to 1 ADCs and reference circuit. All other signal processing, such as Supplies average real power on frequency outputs (F1, F2) multiplication and filtering, is carried out in the digital domain. High frequency output (CF) calibrates and supplies instantaneous real power This approach provides superior stability and accuracy over Logic output (REVP) indicates potential miswiring or time and in extreme environmental conditions. negative power The AD71056 supplies average real power information on F1 Direct drive for electromechanical counters and 2-phase stepper motors (F1, F2) and F2, the low frequency outputs. These outputs either directly Proprietary ADCs and DSP provide high accuracy over large drive an electromechanical counter or interface with an MCU. variations in environmental conditions and time The high frequency CF logic output, ideal for calibration On-chip power supply monitoring purposes, provides instantaneous real power information. On-chip creep protection (no load threshold) The AD71056 includes a power supply monitoring circuit on On-chip reference 2.45 V (20 ppm/°C typical) with external the V overdrive capability DD supply pin. The AD71056 remains inactive until the supply voltage on V Single 5 V supply, low power (20 mW typical) DD reaches approximately 4 V. If the supply falls below 4 V, the AD71056 also remains inactive and the F1, Low cost CMOS process F2, and CF outputs are in their nonactive modes. GENERAL DESCRIPTION Internal phase matching circuitry ensures that the voltage and The AD710561 is a high accuracy, electrical energy metering IC current channels are phase matched, and the HPF in the current channel eliminates dc offsets. An internal no load threshold with a precise oscillator circuit that serves as a clock source to ensures that the AD71056 does not exhibit creep when no load the chip. The AD71056 eliminates the need for an external is present. crystal or resonator, thus reducing the overall cost of building a meter with this IC. The chip directly interfaces with the shunt The part is available in a 16-lead, narrow body SOIC package. resistor. FUNCTIONAL BLOCK DIAGRAM

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AD71056.pdf Datasheet