MCP3906A

MCP3905A/05L/06A Energy Metering ICs with Active Real Power Pulse Output Features • Supplies active (real) power measurement for single-phase, residential energy metering • Supports IEC 62053 International Energy Metering Specification and legacy IEC 1036/61036/687 Specifications • Two multi-bit, DAC, second-order, 16-bit, DeltaSigma Analog-to-Digital Converters (ADCs) • Reduced pulse width of calibration output frequency and mechanical counter drive for low power meter designs (MCP3905L) • Increased output frequency constant options for meter design (MCP3905L) • 0.1% typical measurement error over 500:1 dynamic range (MCP3905A / MCP3905L) • 0.1% typical measurement error over 1000:1 dynamic range (MCP3906A) • Programmable Gain Amplifier (PGA) for small signal inputs supports low value shunt current sensor: - 16:1 PGA - MCP3905A / MCP3905L - 32:1 PGA - MCP3906A • Ultra-low drift on-chip reference: 15 ppm/°C (typ.) • Direct drive for electromagnetic mechanical counter and two-phase stepper motors • Low IDD of 4 mA (typ.) • Tamper output pin for negative power indication • Industrial Temperature Range: -40°C to +85°C • Supplies instantaneous real power on HFOUT for meter calibration Description The MCP3905A/05L/06A devices are energy-metering ICs designed to support the IEC 62053 international metering standard specification. They supply a frequency output proportional to the average active real power, as well as a higher-frequency output proportional to the instantaneous power for meter calibration. The MCP3905L offers reduced pulse width of calibration output frequency and mechanical counter drive for lower power meter designs. They include two 16-bit, Delta-Sigma ADCs for a wide range of IB and IMAX currents and/or small shunt (