MCP3905A-E/SS

The MCP3905A-E/SS is an Energy-Metering IC 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 (<lt/>15 ppm/°C through a specially designed band gap temperature curve for the minimum gradient across the industrial temperature range. A fixed function DSP block is on-chip for active real-power calculation. A no-load threshold block prevents any current creep measurements. A power-ON Reset (POR) block restricts meter performance during low voltage situations.

• Supplies active (real) power measurement for 'single-phase, residential energy metering
• Supports IEC 62053 International energy metering and legacy IEC1036/61036/687 specifications
• Reduced pulse-width of calibration output frequency and mechanical counter drive
• 0.1% typical measurement error over 500:1 dynamic range
• 1:16 PGA for small signal inputs supports low value shunt current sensor
• 15ppm/°C (typical) Ultra-low drift on-chip reference
• Direct drive for electromagnetic mechanical counter and two-phase stepper motors
• 4mA (typical) Low IDD
• Tamper output pin for negative power indication