Product category:
Analogue and Mixed Signal ICs
News Release from: STMicroelectronics | Subject: STPM1x
Edited by the Electronicstalk Editorial
Team on 29 June 2007
Mixed-signal IC is meter on a chip
Energy-metering ICs incorporate all the core circuitry necessary to implement a complete meter system without requiring any other active component.
STMicroelectronics has introduced a family of energy-metering ICs that incorporate all of the core circuitry necessary to implement a complete meter system without requiring any other active component The STPM1x family, measuring active energy as pulse frequency output and featuring fast digital calibration, provides electronic meter manufacturers with a complete, cost-effective series of power-metering chips specifically designed for low-end applications
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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Fully compliant with specifications for single-phase, class 0.5 static meters, the new STPM1x provides fast and easy digital calibration at only one point over the whole current range, which allows a drastic reduction in manufacturing costs when compared with hardware calibration made using a resistor network.
The mixed-signal IC is designed for effective measurement of active energy in a power-line system using a wide variety of current sensors such as shunts, current transformers and Rogowsky coils.
Analogue blocks within the STPM1x include preamplifiers for signal conditioning, analogue-to-digital convertors, and low-drop voltage regulators to supply the circuitry.
In the digital part of the device, the hard-wired digital signal processor uses innovative, ripple-free computation algorithms to calculate the amount of consummated active energy, thus considerably reducing the meter's calibration time.
In addition, the active energy is available through complementary pulsed outputs that enable an easier energy measurement while directly driving stepper-motor counters in low-end applications.
The device is configured and calibrated through a serial port, which exploits the one-time programmable (OTP) cells for permanently storing calibration parameters, hence preventing any subsequent tampering.
Offered in the TSSOP20 Ecopack package, the STPM1x is available in volume now at a price of US $1.40 for quantities of 1000.
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