STPM10

STPM10 Programmable single-phase energy metering IC with tamper detection 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, IEC620532x specifications Less than 0.1% error in the 1000:1 range Precision voltage reference: 1.23 V with 30 ppm/°C max controlled through the SPI by means of a dedicated command set. The configured bits are used for configuration and calibration purposes. From a pair of sigma-delta output signals produced by the analog section, the DSP unit computes the amount of active, reactive and apparent energy consumed, as well as the RMS and instantaneous voltage and current values. The results of the computation are available as pulse frequencies and states on the digital outputs of the device, or as data bits in a data stream, which can be read from the device by means of the SPI interface. The system bus interface is also used for temporary programming of bits of internal volatile memory. The STPM10 generates an output signal with a pulse frequency proportional to the energy, and this signal is used in the calibration phase of the energy metering application. ...