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RF3321

REVERSE PATH HIGH OUTPUT POWER PROGRAMMABLE GAIN AMPLIFIER

RF Micro Devices 

Preliminary

2

RF3321

REVERSE PATH HIGH OUTPUT POWER

PROGRAMMABLE GAIN AMPLIFIER

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

Product Description

3.90

The RF3321 is a variable gain amplifier for use in CATV

+ 0.10

reverse path (upstream) applications. It is designed to be

DOCSIS-compliant for use in cable modems. The gain

4.90

control covers a 56dB range and is serially programma-

+ 0.20

ble via three-wire digital bus for compatibility with stan-

dard baseband chipsets. Amplifier shutdown and transmit

disable modes are hardware-controlled. The device oper-

6.00

+ 0.20

ates 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

8° MAX

0° MIN

is controllable in accurate 1dB steps. The device is pro-

vided in a thermally enhanced, exposed die flag package.

0.60

+ 0.15

0.25

+ 0.05

0.65

1.40

+ 0.10

-A- 0.05

+ 0.05

Note 3

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.

EXPOSED DIE

FLAG

3.302

0.24

0.20

2.286

Optimum Technology Matching® Applied

Si BJT

üSi Bi-CMOS

GaAs HBT

SiGe HBT

GaAs MESFET

Si CMOS

SHDNB 1

TX EN 2

NC 3

VIN 4

VINB 5

VCC1 6

VCC1 7

RAMP 8

Power

Control

Gain Control

and Serial Bus

16 GND

15 NC

14 NC

13 VOUT

12 VOUTB

11 SDA

10 CS

9 SCLK

Functional Block Diagram

Package Style: SSOP16 EDF Slug

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

Ordering Information

RF3321

RF3321 PCBA

Reverse Path High Output Power Programmable

Gain Amplifier

Fully Assembled Evaluation Board

RF Micro Devices, Inc.

7628 Thorndike Road

Greensboro, NC 27409, USA

Tel (336) 664 1233

Fax (336) 664 0454

http://www.rfmd.com

Rev A10 010516

2-1

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