GENERAL DESCRIPTION
The ADE7854A/ADE7858A/ADE7868A/ADE7878A are high accuracy, 3-phase electrical energy measurement ICs with serial interfaces and three flexible pulse outputs. The devices incorporate second-order Σ-∆ analog-to-digital converters (ADCs), a digital integrator, reference circuitry, and all signal processing required to perform total (fundamental and harmonic) active, reactive (ADE7858A, ADE7868A, and ADE7878A), and apparent energy measurement and rms calculations.

FEATURES
    Highly accurate; supports EN 50470-1, EN 50470-3, IEC 62053-21, IEC 62053-22, and IEC 62053-23 standards
    Compatible with 3-phase, 3- or 4-wire (delta or wye) meters, and other 3-phase services
    Supplies total (fundamental and harmonic) active, reactive, and apparent energy and fundamental active/reactive energy on each phase and on the overall system
    0.1% error (typical) in active and reactive energy over a dynamic range of 1000 to 1 at TA = 25°C
    0.2% error (typical) in active and reactive energy over a dynamic range of 3000 to 1 at TA = 25°C
    Averaged rms measurements available in low ripple rms registers
    Supports current transformer and di/dt current sensors
    Dedicated ADC channel for neutral current input
    Estimated neutral current measurement by calculating the rms of the sum of the phase currents in all 3 phases
    0.1% error (typical) in voltage and current rms over a dynamic range of 1000 to 1 at TA = 25°C
    Supplies sampled waveform data on all 3 phases and on neutral current
    Selectable no load thresholds for total and fundamental active and reactive powers, as well as for apparent powers
    Highly accurate low power battery mode phase current monitoring for antitampering detection
    Battery supply input for missing neutral operation
    Phase angle measurements in current and voltage channels
    Calibration frequency (CF) output directly drives LED and opto-isolators
    Reference: 1.2 V (drift of ±5 ppm/°C typical) with external overdrive capability
    Single 3.3 V supply
    40-lead, Pb-free lead frame chip scale package (LFCSP)
    Operating temperature: −40°C to +85°C
    Flexible I2C, SPI, and HSDC serial interfaces