GENERAL DESCRIPTION
The ADE7757 is a high accuracy electrical energy measurement IC. It is a pin reduction version of AD7755 with an enhancement of a precise oscillator circuit that serves as a clock source to the chip. The ADE7757 eliminates the cost of an external crystal or resonator, thus reducing the overall cost of a meter built with this IC. The chip directly interfaces with shunt resistor and only operates with AC input.
   
FEATURES
    On Chip Oscillator as clock source
    High Accuracy, Supports 50 Hz/60 Hz IEC 521/1036
        Less than 0.1% Error Over a Dynamic Range of
        500 to 1
    The ADE7757 Supplies Average Real Power on the
        Frequency Outputs F1 and F2
    The High Frequency Output CF Is Intended for
        Calibration and Supplies Instantaneous Real Power
    Direct Drive for Electromechanical Counters and
        Two Phase Stepper Motors (F1 and 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 2.5 V ± 8% (30 ppm/°C Typical)
        with External Overdrive Capability
    Single 5 V Supply, Low Power (15 mW Typical)
    Low Cost CMOS Process
    AC Input only