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ST7538

POWER LINE FSK TRANSCEIVER

s

s

HALF DUPLEX FREQUENCY SHIFT KEYING

(FSK) TRANSCEIVER

INTEGRATED POWER LINE DRIVER WITH

PROGRAMMABLE VOLTAGE AND CURRENT

CONTROL

PROGRAMMABLE INTERFACE:

鈥?SYNCHRONOUS

鈥?ASYNCHRONOUS

SINGLE SUPPLY VOLTAGE (FROM 7.5 UP TO 12.5V)

VERY LOW POWER CONSUMPTION (Iq=5 mA)

INTEGRATED 5V VOLTAGE REGULATOR

(UP TO 100mA) WITH SHORT CIRCUIT

PROTECTION

8 PROGRAMMABLE TRANSMISSION

FREQUENCIES

PROGRAMMABLE BAUD RATE UP TO 4800BPS

RECEIVING SENSITIVITY 1 mVRMS

SUITABLE TO APPLICATION IN ACCORDANCE

WITH EN 50065 CENELEC SPECIFICATIONS

CARRIER OR PREAMBLE DETECTION

BAND IN USE DETECTION

PROGRAMMABLE REGISTER WITH

SECURITY CHECKSUM

MAINS ZERO CROSSING DETECTION AND

SYNCHRONIZATION

TQFP44 Slug Down

ORDERING NUMBER: ST7538P

s

s

s

s

s

WATCHDOG TIMER

DESCRIPTION

The ST7538 is a Half Duplex synchronous/asyn-

chronous FSK Modem designed for power line

communication network applications. It operates

from a single supply voltage and integrates a line

driver and a 5V linear regulator. The device oper-

ation is controlled by means of an internal register,

programmable through the synchronous serial in-

terface. Additional functions as watchdog, clock

output, output voltage and current control, pream-

ble detection, time-out, band in use are included.

Realized in Multipower BCDV technology that al-

lows to integrate DMOS, Bipolar and CMOS struc-

tures in the same chip.

s

s

s

s

s

s

s

s

BLOCK DIAGRAM

DVdd

AVdd

DVss

AVss

TEST1 TEST2 TEST3

BU

RxFo

CD/PD

CARRIER

DETECTION

TEST

BU

AGC

RxD

CLR/T

PLL

DIGITAL

FILTER

FSK

DEMOD

IF

FILTER

FILTER

AMPL

RAI

SERIAL

INTERFACE

REG/DATA

RxTx

TxD

FSK

MODULATOR

DAC

TX

FILTER

ALC

VOLTAGE

CONTROL

PLI

Vsense

ATO

ATOP1

ATOP2

+

-

VREG

PAVcc

Vdc

PG

XOut

XIn

WD

TOUT

RSTO

MCLK

ZCin

ZCout

C_OUT

CMINUS

CPLUS

D03IN1407

FILTER

CONTROL

REGISTER

CURRENT

CONTROL

CL

REGOK

OSC

TIME BASE

ZC

OP-AMP

September 2003

1/30

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