TLV320AD12A Datasheet, PDF (1/21 Pages) Texas Instruments – 3.3-V INTEGRATED ADSL CODEC

TLV320AD12A
3.3-V INTEGRATED ADSL CODEC
D Complete Discrete Multitone (DMT)-Based
Asymmetric Digital Subscriber Line (ADSL)
Coder/Decoder (Codec) Solution
D Complies With ANSI T1.413, Issue 2 and
ITU G.992.1
D Supports up to 8-Mbit/s Downstream and
800-kbit/s Upstream Duplex
D Integrated 14-Bit Converter for
Transmitter/Receiver
D Integrated Transmit/Receive (TX/RX)
Channel Filters
D Integrated TX/RX Attenuation/Gain
D Integrated Reference
D High-Speed Parallel Interface
SLWS088B – JULY 1999 – REVISED MARCH 2000
D 2s-Complement Data Format
D Selectable 2.2-MSPS or 4.4-MSPS Parallel
Data Transfer Rate
D Serial Configuration Port
D Eight General-Purpose (GP) Output
Terminals
D Supports Multiple-Channel Configuration
D Single 3.3-V Supply
D Hardware/Software Power Down
D –40°C to 85°C Operation
D Packaged in 100-Pin Plastic Quad Flatpack
description
The TLV320AD12A is a high-speed coder/decoder (codec) for central office-side (CO) discrete-multitone (DMT)
asymmetric-digital subscriber line (ADSL) access that supports ANSI Std T1.413, Issue 2 and ITU G.992.1. The
codec is a low-power device comprised of five major functional blocks: transmitter (TX), receiver (RX), clock,
reference, and host interface.
The transmit channel consists of a 25.875-kHz to 1.104-MHz digital band-pass filter, a 14-bit, 8.832-MSPS DAC,
a 1.104-MHz analog low-pass filter, and a transmit attenuator. The receiver channel consists of a two
programmable-gain-amplifier stages (PGA), a 138-kHz analog low-pass filter, a 14-bit, 4.416-MSPS ADC, a
138-kHz digital low-pass filter. An onboard reference circuit generates 1.5-V reference voltage for the
converters.
The codec has two interface ports: a parallel port for data transfer, and a serial port for control. The parallel port
is 16 bits wide, and is reserved for moving data between the codec and a DSP, such as the TMS320C6XX.
Configuration is done via the serial port. A special interface scheme enables multichannel system design. The
TLV320AD12A can be powered down via a dedicated terminal or through software control to reduce heat
dissipation. Additionally, there is a general-purpose (GP) port consisting of eight output terminals for control of
external circuitry.
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 © 2000, Texas Instruments Incorporated
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