DS100BR410_14 Datasheet, PDF (9/23 Pages) Texas Instruments – Low Power Quad Channel Repeater with 10.3125 Gbps Equalizer and De-Emphasis Driver

DS100BR410
www.ti.com
SNLS326B – OCTOBER 2010 – REVISED APRIL 2013
FUNCTIONAL DESCRIPTION
DS100BR410 Functional Descriptions
The DS100BR410 is a Low Power Quad Channel Repeater with Equalizer and De-Emphasis Driver optimized for
operation up to 10.3125 Gbps for backplane and cable applications.
DATA CHANNELS
The DS100BR410 provides four data channels. Each data channel consists of an equalizer stage, a limiting
amplifier, a DC offset correction block, and a CML driver as shown in Figure 7.
1 of 4 Channels - DS100BR410
IN_n+
IN_n-
BST[2]
BST[1]
BST[0]
EQ
SMBus
IDLE
DET
LIMITER
OUTBUF
SMBus
SMBus
OUT_n+
OUT_n-
CS
SDC
SDA
Figure 7. Simplified Block Diagram
EQUALIZER BOOST CONTROL
Each data channel support eight programmable levels of equalization boost. The state of the PIN_MODE control
input determines how the boost settings are controlled. If PIN_MODE is held High, then the equalizer boost
setting is controlled by the Boost Set pins (BST_[2:0]) in accordance with Table 1. If this programming method is
chosen, then the boost setting selected on the Boost Set pins is applied to all channels. When PIN_MODE is
held Low, the equalizer boost level is controlled through the SMBus. This programming method is accessed via
the appropriate SMBus registers (see Table 4). Using this approach, equalizer boost settings can be
programmed for each channel individually. PIN_MODE is internally pulled High, therefore if left open, the boost
settings are controlled by the Boost Set pins (BST_[2:0]). The eight levels of boost settings enables the
DS100BR410 to address a wide range of media loss and data rates.
BST_2
0
0
0
0
1
1
1
1
Inputs
BST_1
0
0
1
1
0
0
1
1
Table 1. Boost / EQ Pin Mode Configuration
BST_0
0
1
0
1
0
1
0
1
SMBus
Register Bits
[8:0]
000000000
000000001
000000011
000000111
000001111
000011111
000101111
000111111
Result @ 5 GHz
2.7 dB
7.3 dB
12.2 dB
16.6 dB
20.6 dB
24.8 dB
27.6 dB (default)
28.9 dB
Copyright © 2010–2013, Texas Instruments Incorporated
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