MCP3905AT-E/SS

The MCP3905AT-E/SS from Microchip Technology is an energy metering integrated circuit designed for single-phase, residential energy metering. It supports international energy metering specifications like IEC 62053 and legacy standards. The device incorporates two 16-bit Delta-Sigma Analog-to-Digital Converters (ADCs) capable of handling a wide range of currents and small shunt resistances.

Key electrical features include a typical measurement error of 0.1% over specified dynamic ranges and an ultra-low drift on-chip reference with 15 ppm/°C typical drift. It offers programmable gain amplifiers (PGAs) with 16:1 gain for MCP3905A/05L and 32:1 gain for MCP3906A, supporting low shunt current sensors. The IC operates with a typical supply current of 4 mA and a voltage of 2.4V.

This energy metering IC is housed in a 24-SSOP surface mount package. It operates within an extended temperature range of -40°C to +125°C, making it suitable for demanding environments. The device provides outputs proportional to active real power, including instantaneous power for meter calibration and average active real power. It also includes features like a tamper output pin for negative power indication and a no-load threshold block to prevent current creep measurements.