製品概要
概要
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. There is also an internal volatile memory, which is 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.
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特徴
- 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.
回路ダイアグラム
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品質 & 信頼性
製品型番 | マーケティング・ステータス | パッケージ | グレード | RoHSコンプライアンスグレード | 材料宣誓書** |
---|---|---|---|---|---|
STPM10BTR | NRND | TSSOP-20 | インダストリアル | Ecopack2 |
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サンプル & 購入
製品型番 | 製品ステータス | Budgetary Price (US$)*/Qty | STから購入 | Order from distributors | パッケージ | 梱包タイプ | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | Autoshutdown | |
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STPM10BTR | | | distributors 販売代理店に在庫がない場合は、STのセールス・オフィスまでお問い合わせください |
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STPM10BTR NRND
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