Power Line

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Power Line Communication Solutions for Automatic Meter Reading (AMR)

and Home Automation

Power Line Communication Solutions Power Line Communication Solutions for Automatic Meter Reading (AMR)for Automatic Meter Reading (AMR)

and Home Automationand Home Automation

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Home & Building Automation

Street Lighting Control

With Power Line Communication , data can be exchanged among powered devices without adding new wires!

Automatic Meter

Reading

Narrowband Network

(ST Power Line Transceivers)

Home Gateway

Multimedia

Broadband Network

Audio/Video Distribution

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ST Makes the History in Power Line Communication

ST Makes the History in ST Makes the History in Power Line CommunicationPower Line Communication

� 1989: ST7536 is the first monolithic Power Line Modem for the Automated Meter Reading

� 1995: ST releases the ST7537, second generation Power Line Modem for home connectivity

� 2002: ST introduces the ST7538, third generation Power Line Transceiver with integrated Power Line Interface (PLI)

� 2004: ENEL selects ST7538 as the communication heart for its breaking-through Automatic Meter Reading (AMR) project

� 2005: The LEGRAND Home & Building Automation system based on ST7538 is selected to equip the tenth tallest building in the world located in Singapore

� 2006: ST introduces the ST7540 Transceiver, the most compact and cost effective solution for narrowband power line communication

� Several million Power Line Transceivers sold to-date!

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1989 20021995 2006

1st Generation B-FSK Modem

- Up to 1200bps baud rate

- PLCC28 11.6x11.6x4.5mm

ST Power Line Transceivers:a Continuous Evolution…

ST Power Line Transceivers:ST Power Line Transceivers:a Continuous Evolutiona Continuous Evolution ……

2nd Generation B-FSK Modem

- Up to 2400bps baud rate

- PLCC28 11.6x11.6x4.5mm

ST7537

ST7536

3rd Generation B-FSK Transceiver

- Multi frequency/multi baud up to 4800bps

- Integrated differential Power Line Interface

- TQFP44 10x10x1.4 mm

NEW

4th Generation B-FSK “Stripped Down” Transceiver

- Multi frequency/multi baud up to 4800bps

- Integrated single ended Power Line Interface

- HTSSOP28 4.4x9.7x1mm

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ApplicationApplication

PHYPHY

NetworkNetwork

LLCLLCMAC

NodeApplication Microcontroller

uC CoreuC Core

PeripheralsPeripherals

FLASHMEMORYFLASH

MEMORY

Power Line Communication Node based on ST7538/40 Transceivers partitioning

SMPSSMPS

CouplingNetwork

Power Line

ModemModem

Power AmplifierPower Amplifier

Analog front EndAnalog front EndVoltage

Reg.Voltage

Reg.

I/OsI/Os

ST7538/40Power Line

Transceivers

Com

mun

icat

ion

prot

ocol

�� Modular and flexibleModular and flexible�� Protocol Protocol ““ agnosticagnostic ””�� Minimum bill of materialMinimum bill of material�� Cost effectiveCost effective

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� Half duplex Frequency Shift Keying (FSK) Modem� 8 programmable channels:

� 60, 66, 72, 76, 82, 86 kHz (band A)� 110 kHz (CENELEC band B)� 132.5 kHz (CENELEC band C)

� 4 programmable BAUD rates:� 600, 1200, 2400, 4800 bps

� Programmable receiver sensitivity� low: equal to band in use� medium: 0.5mVrms� high: 0.25mVrms

� Integrated Differential Power Line Interface� Programmable current and voltage control� 14Vpp, 370mArms output levels capability� Freezable power amplifier output level� EN50065 CENELEC and FCC part 15 compliant

ST7538Q Key Features (1)ST7538Q Key Features (1)

MODEM SECTION

RECEIVER SECTION

TRANSMITTER SECTION

Robust bidirectional communication

for whatever application

receiving performances

adaptable to noise

environment

Turn-key embedded

smart amplifier

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� 5V, 50mA linear voltage regulator output� 3.3V, 50mA linear voltage regulator output� Programmable output clock

� 16MHz, 8MHz, 4MHz, off� Uncommitted OpAmp (7MHz gain bandwidth)� Watchdog timer

� Carrier and preamble detection� Band in use detection� Programmable transmission time out� Programmable header and frame length recognition� Mains zero crossing detection and synchronization

� Single power supply (from 7.5V to 12.5V)� Low quiescent current (5mA)

ST7538Q Key Features (2)ST7538Q Key Features (2)

AUXILIARY FUNCTIONS

COMMUNICATION FEATURES

OTHER FEATURES

Bill of material

reduction

Easier implementation

Simple supply, low power

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� Same ST7538Q FSK modem core� Removed some “auxiliary” functionalities� Reduced size� New enhanced single ended Power Line Interface� Particularly suitable for simple, compact and cost effective applications

ST7540 ST7540 ““ stripped downstripped down ””Power Line TransceiverPower Line Transceiver

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Function available on ST7540 but not notified to the host controller

[�]�Register Protection

All terminals accessible in ST7540

Single Ended(500mA rms)

Double Ended(370mA rms)

Power Line Interface

Function available on ST7540 but not notified to the host controller

[�]�Transmission Time-out

Smaller size for space constrained applications

HTSSOP28(4.4X9.7X1mm)

TQFP44(10X10X1.4mm)

Package

�Received signal output (RxFo pin)

�Uncommitted on chip OpAmp

�Mains Zero Crossing Detection

CommentsST7540ST7538QFEATURES

ST7540 vs. ST7538Q ComparisonST7540 vs. ST7538Q Comparison

� ST7538 and ST7540 are interoperable

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ST7540 vs. ST7538 FilteringST7540 vs. ST7538 Filtering

� Easy coupling interface� Filter transfer function not

affected by load impedance� Signal components required

Mains

Passive filtering

Power Component

s

Pre AMP

Power AMP

ST7540 PLI

PLI

PLI

Pre AMP

ST7538- PLI

Power AMP

Mains

Signal Components

Active filtering

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…here’s a true ST7540 based PLC Node !

very low

B.O.M!

Isolation Transformer

Selective Output Filter

SMPS

3 resistors for control loops threshold set up

Few signal passives for Tx Active Low Band Pass Filtering

Few signal passives for Rx Passive Filtering

ST7540Transceiver

Ext

erna

lM

icro

cont

rolle

r5V or 3.3V

Supply

Clock provided to the microcontroller

Crystal

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ST7540 Reference Design

SMPS

Tx & Rx Filters

Surge and Burst Protections

Isolated Coupling Transformer

Crystal Oscillator

ST7540 IC

No easier or faster way to realize a compact and cost effective PLC system !

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ST Power Line TransceiversST Power Line TransceiversDemonstration boards evolutionDemonstration boards evolution

Performance/Features

Non-isolated 132.5kHz NEWNEW

Isolated Dual Channel

Isolated 132.5kHz

EVA

LST7

538-

2

EVA

LST7

538D

UA

L

EVA

LST7

540-

1

Isolated Single Channel

…

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Control BoardControl Board(EVALCOMM BOARD)(EVALCOMM BOARD)

�Based on ST72F651�USB1.1 Full Speed I/F 12Mbps�Application FW USB download

�8bit A/D 8 Inputs and 12 bit D/A 4 outputs�No external supply voltage needed�SPI,I2C I/F available�32k Flash, 5k RAM memories

U S BU S BU S B

New ST7538/40 PLT BoardsNew ST7538/40 PLT Boards(EVALST7538DUAL,(EVALST7538DUAL,

EVALST7540EVALST7540 --1)1)

� Isolated PLT board�Small size�Flexible and modular architecture�Plug and play approach

Software InterfaceSoftware Interface�Easy application management�Windows compatible

New!New!

Our new evaluation environment lets you put your fingers onto PLC!

Our new evaluation environment lets you put Our new evaluation environment lets you put your fingers onto PLC!your fingers onto PLC!

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More ResourcesMore Resources

• Power Line Communication products web page:

• On-line web seminar:

www.st.com/powerline

• For support contact us at:

www.st.com/powerlinesupport

http://www.st.com/stonline/company/seminar/overview 8.htm