Datasheet Analog Devices AD71056AR

Energy Metering IC with Integrated
Oscillator and Reverse Polarity Indication
AD71056
FEATURES The AD71056 specifications surpass the accuracy requirements
as quoted in the IEC62053-21 standard. On-chip oscillator as clock source
High accuracy, supports 50 Hz/60 Hz IEC62053-21
Less than 0.1% error over a dynamic range of 500 to 1
Supplies average real power on frequency outputs (F1, F2)
High frequency output (CF) calibrates and supplies
instantaneous real power
Logic output (REVP) indicates potential miswiring or
negative power
Direct drive for electromechanical counters and 2-phase
stepper motors (F1, 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 2.45 V (20 ppm/°C typical) with external
overdrive capability
Single 5 V supply, low power (20 mW typical)
Low cost CMOS process The only analog circuitry used in the AD71056 is in the Σ-Δ
ADCs and reference circuit. All other signal processing, such as …