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19-1460; Rev 0; 4/99
MAX3750 Evaluation Kit
General Description
The MAX3750 evaluation kit (EV kit) simplifies evaluation
of the MAX3750/MAX3751 port bypass ICs. It provides
impedance transformation networks that allow interface
with standard 50Ω test equipment.
This fully assembled and tested EV kit includes a jumper
to facilitate signal flow selection, and a calibration circuit
that allows accurate jitter measurement.
o
Interfaces with 50Ω Systems
o
Fully Assembled and Tested
o
Calibration Circuit for Accurate Jitter
Measurement
Features
Evaluates: MAX3750/MAX3751
Ordering Information
PART
MAX3750EVKIT
TEMP. RANGE
0°C to +70°C
IC PACKAGE
16 QSOP
Component List
DESIGNATION QTY
C1–C10,
C13–16
C11
C12
J1
J2–J13
L1
None
R1, R2, R4, R5,
R7, R8, R10,
R11, R13, R14,
R16, R18
R3, R6, R9,
R12, R15, R17
VCC, GND
U1
None
None
14
1
1
1
12
1
1
12
DESCRIPTION
0.1µF, 25V min, 10% ceramic
capacitors
2.2µF, 25V min, 10% ceramic
capacitor
33µF ±10%, 16V min tantalum
capacitor
3-pin header (0.1" center)
SMA connectors (edge mount)
56nH inductor
Shunt for J1
43.2Ω, 1% resistors
Note:
To evaluate the MAX3751, order the MAX3750EVKIT and
a sample of the MAX3751.
Component Supplier
SUPPLIER
AVX
PHONE
803-946-0690
FAX
803-626-3123
Note:
Please indicate that you are using the MAX3750 or
MAX3751 when contacting this component supplier.
Quick Start
To evaluate the MAX3750 or MAX3751 input-to-output
signal path:
1) Connect a differential signal source to the input at
IN+, IN-. Set the signal amplitude to 500mVp-p. The
input signal can have a data rate up to 1Gbps for
the MAX3751 and 2.1Gbps for the MAX3750.
2) Connect OUT+ and OUT- through 50Ω matched
impedance cables to a 50Ω oscilloscope.
3) Connect a +3.3V supply to the VCC terminal, and a
ground to the GND terminal.
4) Shunt pins 1 and 2 on J1 to select the IN to OUT
signal path.
5) Ensure that the differential signal at the oscilloscope
is between 425mV and 690mV.
6
1
1
1
1
178Ω, 1% resistors
2-pin headers
MAX3750CEE or MAX3751CEE
(16 QSOP)
MAX3750/MAX3751 circuit board
MAX3750/MAX3751 data sheet
________________________________________________________________
Maxim Integrated Products
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For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX3750 Evaluation Kit
Evaluates: MAX3750/MAX3751
Input and Output
Impedance Conversion
For convenient interface with standard test equipment,
the MAX3750 EV kit is equipped with impedance trans-
forming resistive networks on its inputs (50Ω to 75Ω)
and outputs (75Ω to 50Ω). The impedance transforming
networks also introduce signal attenuation. The input
signal is attenuated by a factor of 0.64, and the output
signal is attenuated by a factor of 0.43. For example, a
differential signal of 600mV applied to the input termi-
nals of the MAX3750 EV kit will produce a differential
input signal of 381mV across the IC’s input pins. If a
differential signal of 225mV is observed at the output
terminals of the EV kit, then the actual output of the IC
is a differential signal of 600mV.
Table 1. Connections, Adjustments,
and Controls
CONTROL
SHUNT BETWEEN
PINS
1–2
J1
2–3
Connects LIN to
OUT
SELECT
Connects IN to
OUT
J2
LOUT+
50Ω
C1
0.1µF
R1
43.2Ω
75Ω
75Ω
1
2
16
15
14
13
12
11
10
9
75Ω
J1 SEL
1 2 3
C9
0.1µF
C10
0.1µF
L1
56nH
75Ω
75Ω
R7
43.2Ω
C5
0.1µF
50Ω
J6
IN+
J3
LOUT-
50Ω
C2
0.1µF
R3
178Ω
75Ω
R2
43.2Ω
GND
LOUT+
LOUT-
GND
GND
OUT+
OUT-
GND
GND
IN+
R9
178Ω
3
4
5
U1
MAX3750
MAX3751
C6
0.1µF
50Ω
J7
IN-
IN-
V
CC
V
CC
LIN+
LIN-
SEL
R8
43.2Ω
R10
43.2Ω
C7
0.1µF
50Ω
J8
LIN+
R12
178Ω
J4
OUT+
50Ω
C3
0.1µF
R4
43.2Ω
75Ω
6
7
J5
OUT-
50Ω
C4
0.1µF
R6
178Ω
75Ω
R5
43.2Ω
8
C8
0.1µF
50Ω
J9
LIN-
R11
43.2Ω
VCC
C11
2.2µF
R16
43.2Ω
R17
178Ω
C15
0.1µF
C12
33µF
GND
J12
TEST+
J10
TEST2+
50Ω
C13
0.1µF
R13
43.2Ω
R15
178Ω
75Ω
50Ω
J11
TEST2-
50Ω
C14
0.1µF
75Ω
R14
43.2Ω
R18
43.2Ω
C16
0.1µF
50Ω
J13
TEST-
Figure 1. MAX3750 EV Kit Schematic
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_______________________________________________________________________________________
MAX3750 Evaluation Kit
Evaluates: MAX3750/MAX3751
1.0"
1.0"
Figure 2. MAX3750 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX3750 EV Kit Component Placement Guide—
Solder Side
_______________________________________________________________________________________
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MAX3750 Evaluation Kit
Evaluates: MAX3750/MAX3751
1.0"
1.0"
Figure 4. MAX3750 EV Kit PC Board Layout—Ground Plane
Figure 5. MAX3750 EV Kit PC Board Layout—Power Plane
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1999 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.

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