STLC1512 Datasheet, PDF (1/26 Pages) STMicroelectronics – NorthenLite™ G.lite BiCMOS Analog Front-End Circuit

STLC1512
s Low power architecture -- Class AB, current
drive, output stage through a centre tapped
transformer to facilitate power supply switching
between 5.0V and a lower voltage. (3.3V in the
reference design) This gives a reduction in
power consumption.
s 480mW power consumption with a typical G.lite
signal.
s 600mA current driving capability
s Positive +5.0V and one lower supply. (3.3V in
the reference design)
s Switching power supplies to save power
s Thermal overload shutdown
s Four programmable receive gains
s Opamp for a low pass filter in the receive path
s Undedicated opamp with separate power down
control (used as a transmit path filter in the
reference design)
s Separate power down control for Tx and Rx
path
s 48-pin TQFP (7x7x1.4mm) package
Figure 1. Block Diagram
NorthenLite™ G.lite Loop Driver
PRODUCT PREVIEW
TQFP48 (7x7x1.40)
ORDERING NUMBER: STLC1512
1.0 GENERAL DESCRIPTION
The STLC1512 G.lite line driver chip contains the line
driver as well as part of the receive path required in a
central office G.lite modem. It provides an interface
between the AFE chip (STLC1511) and the tele-
phone line. The line driver chip has been designed
with low power consumption, high signal to noise
plus distortion ratio and high current driving capabili-
ty.
DCFBON
PAIN
DCFBOP
AMPIN
AMPIP
AMPOUT
PAIP
TXANG
RBIAS
REF2P5
RXANG
LPFIN
LPFOUT
OPAMP
TX REF
Buffer
RX REF
Buffer
LPF AMP
DC
Feedback
Amp
Preamp
Thermal
Shutdown
BIAS
Power
Stage
PGA
November 2000
This is preliminary information on a new product now in development. Details are subject to change without notice.
DCFBIP
DCFBIN
FPP
PWRVEEx
PAOPx
BUFFP
BUFFN
FPN
PAONx
RXPD
AMPPD
TXPD
PGAIN
PGA1
PGA0
PGAOUT
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