GS2984 Adaptive Cable Equalizer

Data Sheet

50985 - 3

March 2010

3 of 20

Contents

Key Features........................................................................................................................................................1

Applications.........................................................................................................................................................1

Description...........................................................................................................................................................1

Revision History .................................................................................................................................................2

1. Pin Out...............................................................................................................................................................4

1.1 GS2984 Pin Assignment .................................................................................................................4

1.2 GS2984 Pin Descriptions ................................................................................................................4

2. Electrical Characteristics ............................................................................................................................6

2.1 Absolute Maximum Ratings ..........................................................................................................6

2.2 DC Electrical Characteristics ........................................................................................................6

2.3 AC Electrical Characteristics ........................................................................................................7

2.4 Typical Performance Curves ........................................................................................................8

3. Input/Output Circuits ..................................................................................................................................9

4. Detailed Description.................................................................................................................................. 10

4.1 Serial Digital Inputs ...................................................................................................................... 10

4.2 Cable Equalization ........................................................................................................................ 11

4.3 Serial Digital Outputs ................................................................................................................... 11

4.4 Programmable Squelch Adjust (SQ_ADJ) .............................................................................. 12

4.5 Mute and Carrier Detect .............................................................................................................. 12

4.6 GAIN_SEL ......................................................................................................................................... 13

4.7 CMSET Operation .......................................................................................................................... 13

4.8 Output Rise/Fall Times ................................................................................................................ 14

5. Application Information .......................................................................................................................... 15

5.1 High Gain Adaptive Cable Equalizers .................................................................................... 15

5.2 PCB Layout ....................................................................................................................................... 15

5.3 Typical Application Circuit ........................................................................................................ 16

6. Package & Ordering Information .......................................................................................................... 17

6.1 Package Dimensions ..................................................................................................................... 17

6.2 Packaging Data ............................................................................................................................... 17

6.3 Recommended PCB Footprint ................................................................................................... 18

6.4 Marking Diagram ........................................................................................................................... 18

6.5 Solder Reflow Profiles .................................................................................................................. 19

6.6 Ordering Information ................................................................................................................... 19