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MAX19000 Evaluation Kit
Table_3._Test_Points_and_Their_Functions
TEST_POINT
TMPSNS
TP1
TP2
TP3
TP12
TP14
TP15
TP16
TP17
SIGNAL
TEMPSNS
DIN
LLEAKP0
LLEAKP1
DOUT
SCLK
CS
LOAD
RST
FUNCTION
MAX19000 die temperature indicator
Serial-data input
Low-leakage enable, channel 0
Low-leakage enable, channel 1
Serial-data output
Serial clock
Chip select
Load
Serial reset
High-Speed Digital I/Os
The top and bottom edges of the PCB are populated with
end-launch SMA connectors, and are the high-speed
digital I/Os of the MAX19000. The inputs are terminated
internally to the MAX19000 IC. The outputs require termi-
nation (nominally 50 I ) at the end of the attached cable.
The board power supply (VRCV) is the voltage used to
terminate the comparator outputs on the MAX19000 IC.
Setting VRCV to +1.2V makes the high-speed digital I/Os
compatible with LVDS levels.
The high-speed digital inputs (DATA0/NDATA0, RCV0/
NRCV0, DATA1/NDATA1, and RCV1/NRCV1) are intend-
ed for use with a high-speed differential signal source
such as LVDS, LVPECL, etc. If only a single-ended stim-
ulus source is available, a converter consisting of a 1:1
ratio transformer can be used to produce a differential
pair of inputs for DATA0/NDATA0 or DATA1/NDATA1. A
tri-resistor network can be used to produce a differential
logic level for RCV0/NRCV0 or RCV1/NRCV1 inputs.
The high-speed digital outputs (CL0/NCL0, CH0/NCH0,
CL1/NCL1, and CH1/NCH1) are intended for use with a
high-speed differential logic analyzer. These outputs are
internally pulled up to the VCTV voltage through internal
50 I resistors. These outputs can be double-terminated
at the measurement source by external 50 I resistors.
Pin-Driver Outputs
The two pin-driver outputs (DUT0 and DUT1) are through
end-launch SMA connectors on the right-edge of the
PCB. The outputs have a typical output impedance of
50 I , but this can be adjusted by software.
Test Points
There are nine test points on the MAX19000 EV kit to
facilitate performance analysis and circuit modification.
These test points are listed in Table 3.
Device Ground Sense
The MAX19000 IC has the ability to sense the ground
potential at the device under test (DUT). The MAX19000
EV kit is preconfigured to have the device ground sense
(DGS) pin connected to the ground plane. If remote
sensing is desired, remove the shunt on jumper JU18
and connect the pin 1 of JU18 to the remote DUT ground.
Temperature Sensing
The MAX19000 EV kit provides the means to deter-
mine the MAX19000 IC’s die temperature through the
TMPSNS test point. During operation, TMPSNS should
be continuously monitored to ensure that the junction
temperature does not exceed +150 N C, which corre-
sponds with +4.2V. During normal operation, a voltage
of +3V to +3.6V is typical.
10_ _ ______________________________________________________________________________________
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