DS125BR800AEVM Datasheet, PDF (8/18 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – SMA evaluation kit provides a complete high band-width platform to evaluate the signal integrity

Quick Start Guide
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5. Set the input equalization level.
• For external pin mode control of the equalization level:
• Set ENSMB = 0 (1 kΩ to GND) by using the SW2 (3-2-1) = (ON-OFF-OFF).
• SW4 pin1,2 must be set to the OFF positions, so the SMBUS signals are disconnected.
• Refer to Table 1 for information on the 3 switch settings for the 4 level input.
Example:
• Set EQB[1:0] with SW1 for the B bank of inputs (top 4 inputs of DS125BR800A).
• SW1 (6-5-4), (3-2-1) = (OFF-ON-OFF), (OFF-ON-OFF) = EQB[1:0] = R,R (Level 6).
• Set EQA[1:0] with SW8 for the A bank of inputs (bottom 4 inputs of DS125BR800A).
• SW8 (6-5-4), (3-2-1) = (OFF-ON-OFF), (OFF-ON-OFF) = EQA[1:0] = R,R (Level 6).
Level
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
EQA/B[1:0]
0, 0
0, R
0, F
0, 1
R, 0
R, R
R, F
R, 1
F, 0
F, R
F, F
F, 1
1, 0
1, R
1, F
1, 1
Table 4. EQ Settings available with PIN MODE
SW1 - EQB[1:0] or SW8 - EQA[1:0]
6
5
4
3
2
1
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
EQ (dB) @ 6 GHz
3.1
6.7
8.4
9.1
13.7
16.2
15.9
17.0
20.7
21.8
23.6
24.7
28.0
29.2
30.9
31.9
8
DS125BR800AEVM Evaluation Kit
Copyright © 2013, Texas Instruments Incorporated
SNLU151 – September 2013
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