RF3321

Preliminary RF3321 REVERSE PATH HIGH OUTPUT POWER PROGRAMMABLE GAIN AMPLIFIER 2 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 3 -A- 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. 3.90 + 0.10 0.25 + 0.05 0.05 + 0.05 Note 3 4.90 + 0.20 0.65 NOTES: 1. Shaded lead is pin 1. 2. Lead coplanarity - 0.10 with respect to datum "A". 3. Lead standoff is specified from the lowest point on the package underside. 6.00 + 0.20 1.40 + 0.10 EXPOSED DIE FLAG 8° MAX 0° MIN 3.302 0.60 + 0.15 0.24 0.20 2.286 Optimum Technology Matching® Applied Package Style: SSOP16 EDF Slug üSi Bi-CMOS SHDNB TX EN NC VIN VINB VCC1 VCC1 RAMP 1 2 3 4 5 6 7 8 Si BJT GaAs HBT SiGe HBT GaAs MESFET Si CMOS Features Differential Input and Output 31dB M...