MCP3905

The MCP3905/06 devices are energy-metering ICs designed to support the ICE62053 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.They include two 16-bit,delta-sigma ADCs for a wide range of IB and IMAX currents and /or small shunt (<200 Ohms) meter designs. MCP3905 includes an ultra-low drift voltage reference with <15 ppm/ through a specially designed band gap temperature curve for the minimum gradient across the industrial temperature range.A fixed-function DSP block of MCP3905 is onchip for active (real) power calculation.Strong output drive for mechanical counters are on-chip to reduce field failures and mechanical counter sticking.A noload threshold block prevents any current creep measurements.A power-on reset (POR) block restricts meter performance during low-voltage situations.These accurate energy-metering ICs MCP3905 with high field reliability are available in the industry-standard pinout.

The MCP3905/06 has 6 features.The first one is supplies active (real) power measurement for single-phase,residential energy-metering.The second one is supports the IEC 62053 international energy metering specification and legacy IEC 1036/61036/687 specifications.The third one is two multi-bit,digital-to-analog converters(DACs),second-order,16-bit,delta-sigma alalog-to-digital converters(ADCs).The fourth one is 0.1% typical measurement error over 500:1 dynamic range(MCP3905).The fifth one is 0.1% typical measurement error over 1000:1 dynamic range(MCP3906).The sixth one is programmable gain amplifier (PGA) for small-signal inputs supports low-value shunt current sensor.The seventh one is ultra-low drift on-chip reference:15 ppm/ (typ.)The eighth one is direct drive for electromagnetic mechanical counter and two-phase stepper motors.The ninth one is low IDD of 4 mA(typ.)The tenth one is tamper output pin for negative power indication.The eleventh one is industrial temperature range : -40 to +85.The last one is supplies instaneous active (real) power on HFOUT for meter calibration.