![]() |
![]() |
![]() |
 STPM01 Product Page
The STPM01 is designed to be the core of various energy metering architectures. Its flexibility allows the creation of several metering solutions, from low cost to high-end ones.
The advanced BiCMOS technology allows the STPM01 to reach high performance in terms of accuracy, allowing the support of IEC62052-11, IEC62053-2X specifications for single-phase class 0.5 watt meters. |
 |
|
|
|
![]() |
![]() |
![]() |
|
The flexible and configurable analog front-end allows the use of different current sensors like Rogowski coils, current transformers and micro-W shunts. The STPM01 is provided with two internal low drop voltage regulators, which supply the analog and the digital sections separately, for high precision and stability. An internal DSP computes the sampled signals coming from the analog front-end, and provides all the data (like active, reactive and apparent powers, RMS voltage and current, line frequency) through a SPI which is used also to control, configure and calibrate the device in a very fast way (by means of a one-time-programming block).
The computed powers are also provided from the DSP to an internal driving stage which allows direct driving of different kinds of stepper motor displays (electromechanical) for low-cost energy meters. The SPI is used also to connect the device to microcontrollers. In this case it acts like a peripheral device, simply supplying data to the micro which is responsible for data collection and management (high-end meters with implemented features like LCD display driving, date/time event recording, multi-tariff, data transmission, etc.).
|
|
|
![]() |
![]() |
![]() |
The STPM01 also has several added features like:
 Live and neutral wires current monitoring for tamper detection for secure energy meters;
LED driving for visible information about power, tamper detection and no-load conditions;
Zero-cross sine wave current signal available, allows turn on/off of heavy inductive loads avoiding arcing phenomenon (automatic control applications). |
|
Very Fast And Easy Control |
|
![]() |
![]() |
![]() |
The OTP block has a complete set of configuration and calibration bits. It allows the fast and accurate calibration of voltage and current sensors, phase correction and temperature drift. ST has developed a control software with PC interface, allowing data to be read from the STPM01, controlling, and calibrating data.
Two demo boards are also available: one is for the STPM01 as a stand-alone solution for stepper driving; the other is a complete solution with the same standalone module coupled via SPI with a control board equipped with ST7 MCU, LCD display and RTC for medium / high-end applications.
|
|
Product pages:
|
|
|
|
|
|
