MAX9124EVKIT Maxim Integrated, MAX9124EVKIT Datasheet - Page 3

• Manufacturer Part Number: MAX9124EVKIT
• Description: Buffers & Line Drivers Evaluation Kit for the MAX9124 MAX9125 MAX9126
• Manufacturer: Maxim Integrated

Specifications of MAX9124EVKIT

• Number Of Input Lines: /
• Supply Voltage - Max: 3.3 V
• Interface: LVDS
• Logic Type: LVCMOS, LVTTL
• Number Of Channels Per Chip: 4

The MAX9124 EV kit provides internal DC or external
AC input signals to the driver circuit and two kinds of
input media, SMA coax or twisted-pair cable, to the
receiver circuit.
The MAX9124 EV kit accepts both internal (DC) and
external (AC) inputs to the driver circuit. Before driving
AC external input signals to DIN1–DIN4 to the driver
circuit, verify there are no shunts across JU1, JU3,
JU4, and JU6 (Table 1). JU1, JU3, JU4, and JU6 can
create DC internal input signals to the driver. To use
JU1, JU3, JU4, and JU6 to create DC input signals,
make sure termination resistors R1, R7, R8, and R14
are removed.
The MAX9124 EV kit also provides two interconnect
options to the receiver circuit: coaxial cable and twist-
Table 2. Driver Probing Connections
Table 1. Using JU1, JU3, JU4, and JU6 to
Provide Input Signals to the Driver Circuit
JUMPER
CHANNEL NAME
JU1
JU3
JU6
JU4
Channel 1
Channel 2
Channel 3
Channel 4
LOCATION
SHUNT
1 and 2
2 and 3
1 and 2
2 and 3
1 and 2
2 and 3
1 and 2
2 and 3
_______________________________________________________________________________________
IC OUTPUT
PIN NAME
OUT1+
OUT2+
OUT3+
OUT4+
OUT1-
OUT2-
OUT3-
OUT4-
Connected to V
Connected to V
Connected to V
Connected to V
Connected to GND
Connected to GND
Connected to GND
Connected to GND
IN PIN
Receiver Circuit Input
Driver Circuit Input
TESTING
CC
CC
CC
CC
DOUT1+
DOUT2+
DOUT3+
DOUT4+
DOUT1-
DOUT2-
DOUT3-
DOUT4-
POINT
Input Signal
IN1 = high
IN2 = high
IN3 = high
IN4 = high
IN1 = low
IN2 = low
IN3 = low
IN4 = low
DRIVER
SIGNAL
INPUT
PROBING HEADER (4 PIN), PIN NO.
MAX9124 Evaluation Kit
JU10, pins 2 (+) and 1 (-)
JU10, pins 3 (+) and 4 (-)
JU7, pins 2 (+) and 1 (-)
JU7, pins 3 (+) and 4 (-)
JU8, pins 2 (+) and 1 (-)
JU8, pins 3 (+) and 4 (-)
JU9, pins 2 (+) and 1 (-)
JU9, pins 3 (+) and 4 (-)
ed-pair cable. When 49.9Ω termination resistors R15,
R16, R18–R21, and R23, R24 are installed, the fail-safe
feature is disabled. To test the fail-safe feature, remove
termination resistors R15, R16, R18–R21, and R23,
R24. Additional paired testing points (IN1+, IN1-) (IN2+,
IN2-) (IN3+, IN3-) (IN4+, IN4-) are provided for the twist-
ed-pair cable connections. When twisted-pair cables are
used as the input media (twisted-pair cables are sol-
dered on testing points IN1-, IN1+, etc.), remove all 0Ω
resistors R33–R40 to avoid signal reflection from the
traces that connect 0Ω resistors to SMA connectors.
The MAX9124 EV kit is designed for direct probing of
all output signals. Additional paired testing points
(DOUT1-, DOUT1+), (DOUT2+, DOUT2-), (DOUT3+,
DOUT3-), (DOUT4+, DOUT4-) are also provided for
connection of twisted-pair cables and probing of the
driver outputs.
The MAX9124 EV kit is designed for direct differential
probing connections. Tables 2 and 3 list the direct
probing connections on the respective pins for all input
and output signals and their respective testing points.
The MAX9124 EV kit has two enables and two disables.
All enables and disables can be controlled by either
jumpers or external signals. Jumpers JU2, JU5, JU16,
and JU19 provide a DC logic signal to driver’s EN and
EN and receiver’s EN and EN, respectively (Table 4).
Table 5 is the enable/disable truth table.
The EV kit can also be controlled by external
enable/disable signal(s). To use external signals to
control enable and disable, SMA connectors need to
Probing Connections
PROBING (OUT+ - OUT-)
JU10, pins 3 (+) and 2 (-)
JU7, pins 2 (+) and 3 (-)
JU8, pins 3 (+) and 2 (-)
JU9, pins 2 (+) and 3 (-)
Enable/Disable
Output Signal
3