AD71056ARZ-RL

AD71056 is a high accuracy, electrical energy metering IC with a precise oscillator circuit that serves as a clock source to the chip. It eliminates the need for an external crystal or resonator, thus reducing the overall cost of building a meter with this IC. The chip directly interfaces with the shunt resistor. This device specifications surpass the accuracy requirements as quoted in the IEC62053-21 standard. The only analogue circuitry used in the device is in the Σ-Δ ADCs and reference circuit. All other signal processing, such as multiplication and filtering, is carried out in the digital domain. This approach provides superior stability and accuracy over time and in extreme environmental conditions. It supplies average real power information on F1 and F2, the low frequency outputs. These outputs either directly drive an electromechanical counter or interface with an MCU.

• 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)
• On-chip power supply monitoring, low cost CMOS process
• On-chip creep protection (no load threshold)
• Temperature coefficient is ±20ppm/°C typical at (VDD = 5V ±5%)
• Gain error is ±4 % ideal typ at (external 2.5V reference, V1 = 21.2mV rms)
• Supply current is 5mA maximum at (VDD = 5V ±5%)
• Operating temperature range from -40°C to +85°C
• Package style is 16-lead SOIC-N

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