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19-0488; Rev 1; 1/97
MAX4112 Evaluation Kit
________________General Description
The MAX4112 evaluation kit (EV kit) simplifies evalua-
tion of the MAX4112 high-speed amplifier. The EV kit
circuit demonstrates the MAX4112 in the noninverting
configuration, set to a gain of 2V/V.
The EV kit comes with the MAX4112 installed. To evalu-
ate the MAX4113, simply order a free sample
(MAX4113ESA), replace the MAX4112 with the
MAX4113 on the EV board, and change the gain-
setting resistor for the desired gain. The minimum
closed-loop gain for the MAX4113 is 8V/V.
____________________________Features
o
500MHz Unity-Gain Bandwidth
o
Optional Adjustable Gain
o
Fully Assembled and Tested
Evaluates: MAX4112/MAX4113
____________________Component List
DESIGNATION QTY
U1
C1, C2
1
2
DESCRIPTION
Maxim MAX4112ESA
10µF, 10V, 20% tantalum capacitors
AVX TAJB106M010 or
Sprague 293D106X0010B
0.1µF, 10% ceramic capacitors
Vitramon VJ1206Y104KXX
1000pF, 10% ceramic capacitors
Vitramon VJ1206Y102KXX
49.9Ω, 1% resistors
499Ω, 1% resistors
SMA connectors
MAX4112/MAX4113 data sheet
_______________Ordering Information
PART
MAX4112EVKIT-SO
TEMP. RANGE
+25°C
BOARD TYPE
Surface Mount
Note: To evaluate the MAX4113, request a MAX4113ESA free
sample.
C3, C4
C5, C6
R1, R2
R
F,
R
G
IN, OUT
None
2
2
2
2
2
1
______________________________
Quick Start
The MAX4112 EV kit is fully assembled and tested.
Follow these steps to verify board operation.
Do not
turn on the power supply until all connections are
completed.
1) The circuit requires supply voltages of ±5V.
Connect these supplies to the corresponding pads
marked V+ and V-. Connect the power-supply
ground to the pad marked GND.
2) Apply a signal no greater than ±1.75V
PK
(11.8dBm)
to the SMA connector marked IN.
3) Connect the output marked OUT to an oscilloscope
through a terminated 50Ω cable.
4) Turn on the power supply and verify the output
signal on the oscilloscope.
______________Component Suppliers
SUPPLIER
AVX
Sprague
Vishay/Vitramon
PHONE
(803) 946-0690
(603) 224-1961
(203) 268-6261
FAX
(803) 626-3123
(603) 224-1430
(203) 452-5670
________________________________________________________________
Maxim Integrated Products
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For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX4112 Evaluation Kit
Evaluates: MAX4112/MAX4113
_______________Detailed Description
Voltage-Gain Adjustment
The MAX4112’s gain can be adjusted with the following
minor modifications to the EV board:
1) Referring to the section
Choosing Feedback and
Gain Resistors
in the MAX4112/MAX4113 data
sheet, select the gain-setting resistor (R
G
) for the
desired gain.
2) Install R
G
.
Layout Considerations
The MAX4112 EV kit layout has been optimized for
high-speed signals, with careful attention given to
grounding, power-supply bypassing, and signal-path
layout. The small, surface-mount, ceramic bypass
capacitors C3–C6 have been placed close to the
MAX4112 supply pins. The unused pins have been
grounded to prevent unwanted noise from coupling into
the circuit. The best performance from the MAX4112
was obtained using high-speed design techniques.
Refer to the
Layout and Power-Supply Bypassing
sec-
tion of the MAX4112/MAX4113 data sheet for details.
V+
C2
10µF, 10V
C1
10µF, 10V
V-
GND
C4
0.1µF
C3
0.1µF
C6
1000pF
C5
1000pF
IN
R1
49.9Ω
3
7
4
U1
MAX4112
2
8
6
OUT
R2
49.9Ω
R
G
499Ω
5
1
R
F
499Ω
Figure 1. MAX4112 EV Kit Schematic
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_______________________________________________________________________________________
MAX4112 Evaluation Kit
Evaluates: MAX4112/MAX4113
Figure 2. MAX4112 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX4112 EV Kit Component Placement Guide—
Solder Side
_______________________________________________________________________________________
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MAX4112 Evaluation Kit
Evaluates: MAX4112/MAX4113
Figure 4. MAX4112 EV Kit PC Board Layout—Component Side
Figure 5. MAX4112 EV Kit PC Board Layout—Solder Side
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
© 1997 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.

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