GS3490 Datasheet, PDF (2/22 Pages) Semtech Corporation – Configurable Adaptive Cable Equalizer/Cable Driver

Revision History
Version
1
0
B
A
ECO
019093
015642
011682
158716
PCN
—
—
—
—
Date
April 2014
September 2013
March 2013
October 2012
Changes and/or Modifications
Converted to Final Data Sheet. Updated
Common Mode Voltage specifications.
Updated to Preliminary Data Sheet. Default
state of CD_ENABLE corrected.
Updates throughout the document.
New Document.
Contents
1. Pin Out.................................................................................................................................................................3
1.1 Pin Assignment ...................................................................................................................................3
1.2 Pin Descriptions ..................................................................................................................................3
2. Electrical Characteristics................................................................................................................................6
2.1 Absolute Maximum Ratings ...........................................................................................................6
2.2 DC Electrical Characteristics ...........................................................................................................6
2.3 AC Electrical Characteristics ............................................................................................................8
3. Input/Output Circuits.................................................................................................................................. 10
4. Detailed Description.................................................................................................................................... 13
4.1 Equalizer Mode ................................................................................................................................. 13
4.1.1 Equalizer Mode Enable...................................................................................................... 13
4.1.2 Serial Digital Inputs (SDI/SDI).......................................................................................... 13
4.1.3 Automatic (Adaptive) Cable Equalization .................................................................. 13
4.1.4 Carrier Detect (CD) .............................................................................................................. 14
4.1.5 Squelch Adjust (EQ_SQ_ADJ) ......................................................................................... 14
4.1.6 Differential Digital Data Outputs (DDO/DDO).......................................................... 14
4.1.7 Adjustable Output Swing, De-Emphasis and Mute (EQ_OP_CTL)..................... 15
4.2 Cable Driver Mode .......................................................................................................................... 16
4.2.1 Cable Driver Mode Enable................................................................................................ 16
4.2.2 Differential Digital Data Inputs (DDI/DDI) .................................................................. 16
4.2.3 Serial Data Outputs (SDO/SDO) ..................................................................................... 16
4.2.4 Slew Rate Selection (CD_SD_EN)................................................................................... 17
4.2.5 Output Amplitude (R_SET)................................................................................................... 17
5. Application Information............................................................................................................................. 18
5.1 Typical Application Circuit ........................................................................................................... 18
5.2 PCB Layout ......................................................................................................................................... 18
6. Package & Ordering Information ............................................................................................................ 19
6.1 Package Dimensions ...................................................................................................................... 19
6.2 Packaging Data ................................................................................................................................ 20
6.3 Recommended PCB Footprint .................................................................................................... 20
6.4 Marking Diagram ............................................................................................................................. 21
6.5 Solder Reflow Profiles .................................................................................................................... 21
6.6 Ordering Information ..................................................................................................................... 21
GS3490
Final Data Sheet
GENDOC-058568
Rev. 1
April 2014
www.semtech.com
2 of 22
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