Datasheet

DS100BR111A

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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.

Table 1. 4-Level Control Pin Settings

Pin Setting Description

0 Tie pin to GND through a 1 KΩ resistor

R Tie pin to ground through 20 KΩ resistor

Float Float the pin (no connection)

1 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).

Table 2. Equalizer Settings

Level EQA1/EQB1 EQA0/EQB0 EQ — 8 bits [7:0] dB Boost at 5 Ghz Suggested Media

1 0 0 0000 0000 = 0x00 2.5 FR4 < 5 inch trace

2 0 R 0000 0001 = 0x01 6.5 FR4 5 inch trace

3 0 Float 0000 0010 = 0x02 9 FR4 10 inch trace

4 0 1 0000 0011 = 0x03 11.5 FR4 15 inch trace

5 R 0 0000 0111 = 0x07 14 FR4 20 inch trace

6 R R 0001 0101 = 0x15 15 FR4 25 inch trace

7 R Float 0000 1011 = 0x0B 17 FR4 25 inch trace

8 R 1 0000 1111 = 0x0F 19 7m 30AWG Cable

9 Float 0 0101 0101 = 0x55 20 FR4 30 inch trace

10 Float R 0001 1111 = 0x1F 23 8m 30 AWG Cable

FR4 35 inch trace

11 Float Float 0010 1111 = 0x2F 25 10m 30 AWG Cable

12 Float 1 0011 1111 = 0x3F 27 10m - 12m, Cable

13 1 0 1010 1010 = 0xAA 30

14 1 R 0111 1111 = 0x7F 31

15 1 Float 1011 1111 = 0xBF 33

16 1 1 1111 1111 = 0xFF 34

Product Folder Links: DS100BR111A