Features: Complete Discrete Multitone (DMT)-Based Asymmetric Digital Subscriber Line (ADSL) Coder/Decoder (CODEC) Solution
Complies With ANSI T1.413 Issue II and ITU G.992.1
Supports up to 8 MBPS Downstream and 800 KBPS Upstream Duplex
Integrated 14-Bit Converters for Transmitter/Echo-Canceller/Receiver (TX/EC/RX)
Integrated 12-Bit DAC for VCXO Control
Integrated TX/EC/RX Channel Filters
Integrated TX/EC/RX Attenuation/Gain
Integrated Voltage Reference
High-Speed Parallel Interface
16-bit 2s Complement Data Format
Selectable 2.2 MSPS or 4.4 MSPS Paralle
Data Transfer Rate
Serial Configuration Port
Eight General-Purpose Output Pins
Single 3.3-V Supply
Hardware/Software Power Down
100-Pin PQFP (PZ) Package
40°C to 85°C Operation
Pinout
SpecificationsSupply voltage, AVDD to AGND, DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 4.5 V
Analog input voltage range to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to AVDD+0.3 V
Digital input voltage range to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to DVDD+0.3 V
Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 to 150
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 to 85
Storage temperature range, Tstr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to 150
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260DescriptionThe TLV320AD11A is a high-speed codec for remote terminal-side (RT) modems that support the ANSI T1.413 [Issue 2 discrete multi-tone (DMT) asymmetric digital subscriber line (ADSL) access] and ITU G.992.1 standards. It is a low-power device that includes five major functional blocks: transmitter, receiver, clock, reference, and host interface. TLV320AD11A is designed to work with the Texas Instruments TLV320AD12 central office-side (CO) codec.
The TLV320AD11A's transmit channel consists of the following functional blocks: 138 kHz digital low-pass filter,bypassable 25.875 kHz digital high-pass filter, 14-bit high speed DAC, 138 kHz analog low-pass filter, transmit attenuator, and an echo cancellation channel. The receiver channel consists of two programmable-gain amplifiers, a frequency equalizer, a 1.104-MHz low-pass analog filter, a 14-bit high speed ADC, and a 1.104-MHz low-pass digital filter. The clock circuit of TLV320AD11A divides a 35.328-MHz frequency from an external VCXO down to the necessary frequencies used throughout the device. The frequency of the external VCXO is controlled by a 12-bit onboard voltage output DAC. An onboard reference circuit generates a 1.5-V reference for the converters.
The TLV320AD11A has 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 Texas Instruments TMS320C6XX. Configuration is done via a serial port. The device can be powered down via a dedicated pin, 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. The TLV320AD11A codec is available in a 100-pin PZ PQFP package and is characterized for operation in the temperature range of 40°C to 85°C.
TLV320AD11A Data Sheet
