Product Description

The RF3321 is a variable gain amplifier for use in CATV reverse path (upstream) applications. It is designed to be DOCSIS-compliant for use in cable modems. The gain control covers a 56dB range and is serially programmable via three-wire digital bus for compatibility with standard baseband chipsets. Amplifier shutdown and transmit disable modes are hardware-controlled. The device operates over the frequency band of 5MHz to 65MHz for use in current U.S. and European systems. The amplifier delivers up to +69dBmV at the output of the balun. Gain is controllable in accurate 1dB steps. The device is provided in a thermally enhanced, exposed die flag package.

Features

? Differential Input and Output

? 31dB Maximum Voltage Gain

? -25dB Minimum Voltage Gain

? 5MHz to 65MHz Operation

? Sophisticated Power Management

? DOCSIS 1.1 RF Compliant

Typical Applications

? Euro-DOCSIS/DOCSIS Cable Modems

? CATV Set-Top Boxes

? Telephony Over Cable

? Home Networks

? Automotive/Mobile Multimedia

? Coaxial and Twisted Pair Line Driver