STPM10(2011) Datasheet PDF - STMicroelectronics

Description

   The STPM10 is designed for effective measurement of active, reactive and apparent energy in a power line system using current transformer and shunt sensors. The device can be implemented for peripheral measurement in a microcontroller-based single-phase or poly-phase energy meter. The STPM10 consists of two main sections: analog and digital. The analog part is composed of preamplifier and first-order sigma-delta A/D converter blocks, a band-gap voltage reference and low-drop voltage regulator. The digital part is composed of system control, oscillator, hard-wired DSP and SPI interface.

Features

◾ Measures active, reactive, and apparent

   energies

◾ Current, voltage RMS and instantaneous

   measurement

◾ Frequency measurement

◾ Ripple-free active energy pulsed output

◾ Live and neutral monitoring for tamper

   detection

◾ Fast and simple one-point digital calibration

   over the whole current range

◾ Integrated linear voltage regulators for digital

   and analog supply

◾ Selectable RC or crystal oscillator

◾ Supports 50 - 60 Hz - IEC62052-11, IEC62053-

   2x specifications

◾ Less than 0.1% error in the 1000:1 range

◾ Precision voltage reference: 1.23 V with 30

   ppm/°C max