DS100BR111A_14 Datasheet, PDF (11/39 Pages) Texas Instruments – Ultra Low Power 10.3 Gbps 2-Channel Repeaters with Input Equalization and Output De-Emphasis

DS100BR111A
www.ti.com
SNLS400C – JANUARY 2012 – REVISED APRIL 2013
FUNCTIONAL DESCRIPTION
The DS100BR111A is a high performance circuit capable of delivering excellent performance. Careful attention
must be paid to the details associated with high-speed design as well as providing a clean power supply. Refer
to the information below and Revision 4 of the LVDS Owner's Manual for more detailed information on high
speed design tips to address signal integrity design issues.
The control pins have been enhanced to have 4 different levels and provide a wider range of control settings.
Refer to Table 1.
Pin Setting
0
R
Float
1
Table 1. 4-Level Control Pin Settings
Description
Tie pin to GND through a 1 KΩ resistor
Tie pin to ground through 20 KΩ resistor
Float the pin (no connection)
Tie pin to VDD through a 1 KΩ resistor
NOTE
4-Level IO pins require a 1K resistance to GND or VDD/VIN. It is possible to tie mulitple 4-
level IO pins together with a single resistor to GND or VDD/VIN. When multiple IOs are
connected in parallel, the resistance to GND or VDD/VIN should be adjusted to
compensate. For 2 pins the optimal resistance is 500 Ohms, 3 pins = 330 Ohms, and 4
pins = 250 Ohms.
NOTE
For 2.5V mode the control pin logic 1 level is VDD (pins 21 and 22), in 3.3V mode the
control pin logic 1 level is defined by VIN (pin 15).
Level
1
2
3
4
5
6
7
8
9
10
EQA1/EQB1
0
0
0
0
R
R
R
R
Float
Float
11
Float
12
Float
13
1
14
1
15
1
16
1
EQA0/EQB0
0
R
Float
1
0
R
Float
1
0
R
Float
1
0
R
Float
1
Table 2. Equalizer Settings
EQ — 8 bits [7:0]
0000 0000 = 0x00
0000 0001 = 0x01
0000 0010 = 0x02
0000 0011 = 0x03
0000 0111 = 0x07
0001 0101 = 0x15
0000 1011 = 0x0B
0000 1111 = 0x0F
0101 0101 = 0x55
0001 1111 = 0x1F
dB Boost at 5 Ghz
2.5
6.5
9
11.5
14
15
17
19
20
23
0010 1111 = 0x2F
25
0011 1111 = 0x3F
27
1010 1010 = 0xAA
30
0111 1111 = 0x7F
31
1011 1111 = 0xBF
33
1111 1111 = 0xFF
34
Suggested Media
FR4 < 5 inch trace
FR4 5 inch trace
FR4 10 inch trace
FR4 15 inch trace
FR4 20 inch trace
FR4 25 inch trace
FR4 25 inch trace
7m 30AWG Cable
FR4 30 inch trace
8m 30 AWG Cable
FR4 35 inch trace
10m 30 AWG Cable
10m - 12m, Cable
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