LVDSEVAL-001 National Semiconductor, LVDSEVAL-001 Datasheet - Page 4

• Manufacturer Part Number: LVDSEVAL-001
• Description: EVALUATION BOARD FOR DS90LV031A
• Manufacturer: National Semiconductor

Specifications of LVDSEVAL-001

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LVDSEVAL-001

LVDS Channel # 1: Cable Interconnect
This test channel connects Driver #1 to Receiver #4 via the cable interconnect. A SMB test point interface
is provided at the receiver input side of the cable. The driver input signal (I1) is terminated with a 50
Ohm termination resistor on the bottom side of the PCB. LVDS signals are probed via test points A1 and
B1. The receiver output signal may be probed at test point O1. A PCB option for a series 450 Ohm resis-
tor is also provided in case 50 Ohm probes are employed on the receiver output signal (see options sec-
tion). A direct probe connection is possible with a high impedance probe (>100 k Ohm loading) on the
LVDS signals at test points A1 and B1.
LVDS Channel # 2: Cable Interconnect
This test channel connects Driver #2 to Receiver #3 also via the cable interconnect. A SMB test point
interface is provided at the receiver input side of the cable. The driver input signal (I2) is terminated with
a 50 Ohm termination resistor on the bottom side of the PCB. LVDS signals are probed via test points A2
and B2. The receiver output signal may be probed at test point O2. A PCB option for a series 450 Ohm
resistor is also provided in case 50 Ohm probes are employed on the receiver output signal. A direct
probe connection is possible with a high impedance probe (>100 k Ohm loading) on the LVDS signals at
test points A2 and B2. This channel duplicates channel #1 so that it may be used for a clock function or
for cable crosstalk measurements.
I1
I2
I3
I4
Driver1
Driver2
Driver3
Driver4
A3
B3
Figure 1: PCB Block Diagram
Channel #1
Channel #2
Channel #3
Channel #4
Channel #5
PCB Trace
Cable
Cable
A5
B5
B1
A2
B2
A4
B4
A1
Receiver4
Receiver3
Receiver2
Receiver1
LVDS Owner’s Manual
O1
O2
O4
O5
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