Datasheet

Evaluation Module U2
1-4
1.4 Evaluation Module U2
Figure 1−2. Power Connections for Evaluation Module U2
Pattern
Generator
Oscilloscope
EVM
Power Supply 1
+
−
Power Supply 2
+
−
VCC
EVM
GND
DUT
GND
1.2V
3.3V
Matched
Cables
SMA to SMA
Matched
Cables
SMA to SMA
P3
J8
J7
J6
J5
P4 P2
R6
100 Ω
50 Ω 50 Ω
J9
R7
Uninstalled
Warning
Power jacks P2, P3, and P4 are not insulated on the backside of the
EVM. Place the EVM on a nonconductive surface.
1.5 Applying an Input to EVM U2
Inputs should be applied to SMA connectors J5 and J6, while keeping R6
installed. The EVM comes with a 100-Ω termination resistor (R6) installed
across the differential inputs for terminating the transmission line.
When using a general-purpose signal generator with 50-Ω output impedance,
make sure that the signal levels are between 0 V to V
CC
with respect to P4.
V
ID
cannot exceed 2 V. A signal generator such as the Advantest D3186 can
simulate LVPECL, LVDS, or CML inputs.
LVPECL levels can be obtained with 100-Ω differential input termination by
setting the input generator to a common-mode of 0.7 V.