MAX9124EVKIT Maxim Integrated, MAX9124EVKIT Datasheet - Page 4

• 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

be added on DEN, REN, DEN, and REN pads with
49.9Ω termination resistors R4, R17, R11, and R22.
Before connecting external signals to DEN, REN,
DEN, REN, verify there are no shunts across
jumpers JU4, JU17, JU11, and JU22.
To evaluate the LVDS differential line driver (MAX9124)
and receiver (MAX9125) together, remove 0Ω resistors
R33–R40 at the input of the receiver circuit, and remove
capacitors C12–C19 and 49.9Ω termination resistors
R2, R3, R5, R6, R9, R10, R12, and R13 at the output of
the driver. Use 100Ω twisted-pair cable (such as CAT-
5) to connect the driver outputs to the receiver inputs.
Connect one end of the twisted-pair cable to test point
DOUT1- and another end to IN1-, etc. Connect function
MAX9124 Evaluation Kit
Table 3. Receiver Probing Connections
Table 4. JU2, JU5, JU16, and JU19
Setting and Enable/Disable Logic Level
Table 5. Enable and Disable Truth Table
4
All other combinations (including floating)
JUMPER
JU2, JU5,
CHANNEL NAME
JU16,
JU19
DEN (REN)
_______________________________________________________________________________________
Channel 1
Channel 2
Channel 3
Channel 4
Low
1 and 2, connected to V
2 and 3, connected to GND
Open, no shunt
SHUNT LOCATION
IC OUTPUT
PIN NAME
DEN (REN)
IN1+
IN2+
IN3+
IN4+
IN1-
IN2-
IN3-
IN4-
High
Evaluating Driver and
Receiver Together
CC
TESTING
ENABLE/DISABLE
POINT
IN1+
IN2+
IN3+
IN4+
IN1-
IN2-
IN3-
IN4-
LOGIC LEVEL
U1 (U2) disable
U1 (U2) enable
OPERATION
FUNCTION
High
Float
Low
PROBING HEADER (4 PIN), PIN NO.
JU11, pins 2 (+) and 1 (-)
JU11, pins 3 (+) and 4 (-)
JU12, pins 2 (+) and 1 (-)
JU12, pins 3 (+) and 4 (-)
JU14, pins 3 (+) and 4 (-)
JU14, pins 2 (+) and 1 (-)
JU13, pins 3 (+) and 4 (-)
JU13, pins 2 (+) and 1 (-)
generator(s) to the driver input(s), and probe at receiv-
er or driver I/Os.
Follow these steps to verify board operation. Do not
turn on the power supply until all connections are
completed:
1) Verify shunts across jumper JU2 (DEN) and JU16
2) Connect a function generator to the driver input DIN1
3) Connect a scope probe across jumper JU25 (OUT1).
4) Single power supply (for the normal operation):
5) Turn on the power supply (supplies), enable the
Note: For connections to verify every channel, see
Tables 2 and 3.
The MAX9124 EV kit can also evaluate the MAX9126, a
differential line receiver with 115Ω internal termination
with the following settings:
(REN) pins 1 and 2.
a) Frequency = 10MHz
b) V
c) Duty cycle = 50%
Use 100Ω twisted-pair cable to connect the driver
outputs to the receiver inputs as shown in Figure 1.
Connect a 3.3V, 400mA power supply to VCC1.
Connect the supply ground to the GND pad closest
to VCC1.
function generator, and verify the output.
Optional separate power supplies (for testing
receiver common-mode response): Connect
3.3V, 200mA power supplies to VCC1 and VCC2.
Connect the supply grounds to the GND pads
closest VCC1 and VCC2, respectively. Be sure
R49 and R50 shorts are cut open.
IL
= 0.00V, V
IH
= 3.00V
OUTPUT
SIGNAL
OUT1
OUT2
OUT3
OUT4
Evaluating MAX9126
HEADER (2 PIN)
PROBING
JU25
JU26
JU28
JU27