ST7538
POWER LINE FSK TRANSCEIVER
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HALF DUPLEX FREQUENCY SHIFT KEYING
(FSK) TRANSCEIVER
INTEGRATED POWER LINE DRIVER WITH
PROGRAMMABLE VOLTAGE AND CURRENT
CONTROL
PROGRAMMABLE INTERFACE:
– SYNCHRONOUS
– 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
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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.
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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
STMICROELECTRONICS [ STMICROELECTRONICS ]
