GS2984 Datasheet, PDF (3/20 Pages) Gennum Corporation – GS2984 Adaptive Cable Equalizer

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
GS2984 Adaptive Cable Equalizer
Data Sheet
50985 - 3
March 2010
3 of 20