TLFD500PN Datasheet, PDF (1/38 Pages) Texas Instruments – 3.3 V INTEGRATED G.LITE ANALOG FRONT END

TLFD500PN
3.3 V INTEGRATED G.LITE ANALOG FRONT END
D Complies With ITU G.992.2 Standard
D 14-Bit Integrated A/D and D/A Converters
D 1.104 Msps Update Rate for the RX Channel
D 276 ksps Update Rate for the TX Channel
D Minimum 50 dB Missing Tone Rejection for
DMT Signals
D Integrated TX/RX Filters
D Integrated Digital Phase Lock Loop (DPLL)
and VCXO DAC
D Integrated Equalizer for Receive Channel
D Integrated PGA in Receive, and PAA in
Transmit Channels
SLAS207A – JUNE 1999 – REVISED NOVEMBER 1999
D Direct Single Serial Interface to TI’s C54x or
C6x DSP (Data and Control)
D Eight General-Purpose I/O Pins
D Software and Hardware Power-Down
Modes
D Industrial Temperature Range
(–40°C to 85°C)
D Integrated Auxiliary Amplifiers for System
Flexibility
D Single 3.3 V Supply
D 80-Pin LQFP (PN) Package
D 2s Complement Data Format
description
The TLFD500PN is a high-speed analog front end for a remote terminal-side ADSL G.Lite modem. The device
is designed to perform transmit encoding (D/A conversion), receive decoding (A/D conversion), transmit and
receive filtering functions, and receive equalizer functions for a frequency division multiplex (FDM) G.Lite
application. The receive channel has an update rate of 1.104 Msps, while the transmit channel has an update
rate of 276 ksps. Both channels use 2s complement data format.
When used in a G.Lite system, the TLFD500PN requires a minimum number of external components. The
device incorporates integrated filtering, DPLL, VCXO DAC (uses 2s complement data format), and 8
general-purpose I/O ports. The general-purpose I/O ports provide a means of reading or writing status bits in
the system. Four auxiliary amplifiers on the chip can be configured (external components may be required) to
provide additional onboard filtering and amplification.
A simple serial interface for data transfer on the digital side reduces system component count. The interface
can be connected directly to the TI C6x and C54x families of DSPs.
The TLFD500PN device is available in an 80-pin PN LQFP package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright © 1999, Texas Instruments Incorporated
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