STPM14 Single phase energy metering IC with pulsed output and digital calibration

The STPM1x family is designed for effective measurement of active energy in a power line system using a Rogowski Coil, current transformer and shunt sensors. This device is specifically designed to provide all the necessary features to implement a single phase energy meter without any other active component. The STPM1x device family consists, essentially, of two parts: the analog part and the digital part. The former, is composed of a preamplifier and first order ∑ Δ A/D converter blocks, band gap voltage reference, low drop voltage regulator. The digital part is composed of a system control, oscillator, hard wired DSP and interface for calibration and configuration. The calibration and configuration are done by OTP cells, that can be programmed through a serial interface. The configured bits are used for testing, configuration and calibration purposes. From two ∑ Δ output signals coming from the analog section, a DSP unit computes the amount of consumed active energy. The active energy is available as a pulse frequency output and directly driven by a stepper counter. In the STPM1x an output signal with pulse frequency proportional to energy is generated. This signal is used in the calibration phase of the energy meter application allowing a very easy approach. When the device is fully configured and calibrated, a dedicated bit of OTP block can be written permanently in order to prevent accidental entry into test mode or changing any configuration bit.

技术特性
Circuit Diagram
STPM14 订购信息
订购型号 产品状态 美金价格 数量 封装 包装形式 温度范围 材料声明
STPM14ATR Active 0.902 1000 TSSOP 20 Tape And Reel -40 °C-85 °C STPM14ATR
DATASHEET
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STPM14 DS5088: Single phase energy metering IC with pulsed output and digital calibration 8 1389KB
APPLICATION NOTES
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AN3306 AN3306: Current sensing in metering applications using a Pulse current sensor and ST metering devices 1 634KB
PRODUCT PRESENTATIONS
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STPM14 ST products and solutions for solar energy 1 2136KB
FLYERS
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FLSTPMC1X1011 Poly-phase chipset for energy measurement 1.0.0 362KB
MARKETING BROCHURES
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STPM14 E-meter single-phase combo solution 1.0.0 1399KB
BRSMETER0911 Smart grid distribution and smart meters - Energy-efficient solutions 1.0 1292KB