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January 13, 2010
AN1525.0
Introduction to the
ISL35111DRZ-EVALZ
Evaluation Kit
The ISL35111 Evaluation Board is a stand-alone printed
circuit board developed to evaluate the performance of
the Intersil ISL35111 Driver.
The evaluation kit includes:
• ISL35111 evaluation board
•Power cable
The key features of the Evaluation board are:
• ISL35111 IC.
• Connection to external 5V power supply.
• On board DC/DC converter that provides the 1.2V
supply to the IC.
• On board de-emphasis selection through a set of
headers.
• SMA connectors to access differential input and
output.
Operation of the ISL35111
Evaluation Board
This section describes how to simply setup your
ISL35111 evaluation board making sure proper power is
applied, describing connection to high speed RF input
and output and finally describing how to easily set the
driver’s de-emphasis. The board is shown in Figure 1.
Power Supply
The board needs to be powered by an independent
external 5.0V power supply via the power header located
at the top of the board using the power cable provided.
The typical current consumption of the board is 48mA
when no signal is applied and 65mA when a signal
applied to the board input.
High Speed Data I/O Interface Connectors
Intersil Driver is intended to be used at the transmit end
of a lossy channel (board trace or twinax cable). The
input SMA connectors should be connected to the signal
source. The output SMA connectors should be connected
to the cable or PCB trace input. We recommend using
length or phase matched RF cables in order to preserve
the fidelity of the differential signal. Make sure proper
torque is applied on the SMA connectors for reliable
measurements and in order to prevent damage to the
connectors.
De-emphasis Setting Control
The ISL35111 offers seven different levels of output
de-emphasis. The amount of de-emphasis varies from
0dB (level 0) to 4dB (level 6). The de-emphasis level is
set by positioning jumpers on header JMP1. DEA and
DEB can each be set to one of three values (High, Low,
Open) depending on jumpers position as illustrated in
Figure 2. Table 1 describes jumper positions to achieve
the various de-emphasis levels. As an example, Figure 2
depicts the jumper position to achieve de-emphasis level
5 (DEA Low and DEB High).
FIGURE 1. ISL35111 EVALUATION BOARD
TABLE 1. JUMPER POSITIONS FOR BOOST SETTINGS
DEA DEB DE LEVEL DE (dB)
No Jumper No Jumper 0 0
No Jumper Jumper to Low 1 0.6
No Jumper Jumper to High 2 1.1
Jumper to Low No Jumper 3 1.6
Jumper to Low Jumper to Low 4 2.3
Jumper to Low Jumper to High 5 3
Jumper to High No Jumper 6 4
FIGURE 2. JUMPER CONFIGURATION FOR
DE-EMPHASIS LEVEL 5
Application Note 1525
