The home-automation system, supplied by The Legrand Group, a leading
producer of systems for electrical installations and information network,
allows different advanced dynamic room scenarios, with lighting, air
conditioning, rolling shutters, and many other room-automation features managed
remotely through a personal computer or a WAP-enabled mobile telephone.
At the heart of the Legrand kit is ST’s ST7538, the world’s first
single-chip FSK (Frequency Shift Keying) power line transceiver, which
integrates the modem section, the analog front end, the power amplifier and a
variety of frequency synthesis, core logic, voltage regulation, and
input/output functions.
Embedded output current and voltage control loops ensure safe and reliable
transmission over existing domestic power lines, where unpredictable impedance
changes may occur. The power amplifier integration and a range of selectable
additional functions – including Zero-Crossing detection, Carrier and Preamble
detection, Band-in-Use detection, Watchdog Timer and Time Out – allows compact
and cost-effective home and building automation systems, designed in accordance
with specifications defined by the European Committee for
Electrotechnical Standardization (CENELEC).
The ST7538 supports many proprietary or open communication protocols based
on FSK modulation schemes, among which are EHS and KONNEX (EN50090). ST’s power
line transceiver has already proven its reliability in the field, with several
million devices now deployed for a broad range of applications including
Automatic Meter Reading (AMR) for energy utilities remote services.
The ST7538P, produced using a 0.6-micron mixed-signal power technology, is
characterized for the -40 to +85 degree C temperature range and is available in
a TQFP44 lead-free package. Pricing for the ST7538P is in the range of $5.60 in
1000 piece quantities.
About Legrand Group
Legrand (www.legrandelectric.com) is the world specialist in products and
systems for electrical installations and information networks, offering
solutions for use in residential, commercial and industrial buildings.
Operating in over 60 countries with sales of €2.9 billion, it employs 26,000
people and its catalogues list more than 130,000 products. At Legrand,
innovation drives growth — with nearly 5% of sales invested in R&D every
year, the group brings out a steady stream of new, high added-value
products.
About ST’s Microcontroller, Linear & Discrete Group
STMicroelectronics is a world leader in offering complete system solutions that
leverage its rich portfolio of Microcontroller, Linear, and Discrete
products, advanced process and design technologies, and applications
expertise. This emphasis on solutions allows the Company to minimize
time-to-market for all customers worldwide in existing and emerging
applications.
