CX20441 데이터 시트보기 (PDF) - Conexant Systems

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CX20441

AccessRunner™ ADSL-USB Modem Device Set

Conexant Systems 

AccessRunner ADSL-USB Modem Device Set Data Sheet

• Bit-synchronous mode

• 176-pin TQFP

1.3.3 CX20431 ADSL Analog Front End Features

• Receive signal path includes:

− Integrated hybrid receiver circuit with programmable gain

− High pass filtering and 27dB of Automatic Gain Control (AGC) to improve signal-to-echo ratio

− 14-bit ADC

• Transmit signal path includes:

− 30dB of AGC for transmit power control

− Low pass filtering to suppress noise in the receive band

− 14-bit DAC

• Independent digital serial data and control interfaces

• Low power tone detection mode

• 32-pin TQFP

1.3.4 CX20441 ADSL Line Driver Features

• Differential input and output line driver

• Line impedance matching during power-down

• Fixed differential gain

• Low power consumption (0.22 W typical)

• 32-pin TQFP

1.4 Reference Design

A reference design for a USB card is available to minimize application design time and costs.

The card is pretested to pass FCC Part 15 and Part 68 for immediate manufacturing.

A design package is available in electronic form. The design package includes files for schematics, bill of materials (BOM),

board layout (Gerber format), and documentation.

The design can also be used for the basis of a custom design by the OEM to accelerate design completion for rapid market

entry.

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