STPM10 Datasheet | STMicroelectronics

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 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 posed of preamplifier and first-order sigmadelta A/D converter blocks, a band-gap voltage reference and low-drop voltage regulator. The digital part is posed of system control, oscillator, hard-wired DSP and SPI interface. There is also an internal volatile memory, which is Table 1. Device summary Order code Temperature range STPM10BTR - 40 to 85 °C TSSOP20 controlled through the SPI by means of a dedicated mand 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 putes the amount of active, reactive and apparent .Data Sheet.net/ energy consumed, as well as the RMS and instantaneous voltage and current values. The results of the putation 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...