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STPM10 Dataheets PDF



Part Number STPM10
Manufacturers STMicroelectronics
Logo STMicroelectronics
Description Programmable single-phase energy metering IC
Datasheet STPM10 DatasheetSTPM10 Datasheet (PDF)

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 Suppo.

  STPM10   STPM10


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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. TSSOP20 www.DataSheet.net/ 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 sigmadelta 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. There is also an internal volatile memory, which is Table 1. Device summary Temperature range - 40 to 85 °C Order code STPM10BTR June 2011 Package TSSOP20 (tape and reel) Packaging 2500 parts per reel 1/51 www.st.com 51 Doc ID 17728 Rev 3 Datasheet pdf - http://www.DataSheet4U.co.kr/ Contents STPM10 Contents 1 2 3 4 5 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.1 5.2 5.3 5.4 5.5 Measurement error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 ADC offset error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Gain error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Power supply DC and AC rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6 7 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Theory of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 www.DataSheet.net/ 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.11 7.12 7.13 General operation description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Analog inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 ΣΔ A/D converters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Zero-crossing detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Period and line voltage measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Load monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Error detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Tamper detection module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 7.9.1 Detailed operational description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Phase compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Clock generator . . . . . . . . . . . . . . . .


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