_______________General Description
The MAX4278 evaluation kit (EV kit) simplifies evalua-
tion of the MAX4178/MAX4278 330MHz/310MHz high-
speed buffers. RF-style connectors (SMA) and 75Ωter-
minating resistors are included for video test equipment
compatibility.
The EV kit comes with the MAX4278 installed. To evaluate
the MAX4178, simply order a free sample (MAX4178ESA)
and replace the MAX4278 with the MAX4178. No other
changes are necessary.
____________________________Features
♦310MHz -3dB Bandwidth
♦75ΩTerminated Input and Output
♦Fully Assembled and Tested
Evaluates: MAX4178/MAX4278
MAX4278 Evaluation Kit
________________________________________________________________
Maxim Integrated Products
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PART TEMP. RANGE BOARD TYPE
MAX4278EVKIT-SO +25°C Surface Mount
QTY DESCRIPTION
U1 1
C1, C6 2
C2, C5 2 0.1µF, 10% ceramic capacitors
Vitramon VJ1206Y104KXX
C3, C4 2
R1, R2 2 75Ω, 5% resistors
RG 1
IN, OUT 2
None 1
1000pF, 10% ceramic capacitors
Vitramon VJ1206Y102KXX
10µF, 10V, 20% tantalum capacitors
AVX TAJB106M010 or
Sprague 293D106X0010B
Maxim MAX4278ESA
SUPPLIER PHONE FAX
AVX
Sprague
Vishay/Vitramon
(803) 946-0690
(603) 224-1961
(203) 268-6261
(803) 626-3123
(603) 224-1430
(203) 452-5670
______________Component Suppliers
DESIGNATION
0Ωresistor
SMA connectors
High-frequency amplifier PC board
____________________Component List
______________Ordering Information
_________________________Quick Start
The MAX4278 evaluation kit is fully assembled and test-
ed. 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 the +5V supply to the V+ pad, and the -5V
supply to the V- pad. Connect the power-supply
ground to the pad marked GND.
2) Apply a signal of ±1.5V maximum to the SMA con-
nector marked IN.
3) Connect the output marked OUT to an oscilloscope
through a terminated 75Ωcable.
4) Turn on the power supply and verify the output sig-
nal on the oscilloscope.
Note: To evaluate the MAX4178, request a MAX4178ESA free
sample.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
Evaluates: MAX4178/MAX4278
MAX4278 Evaluation Kit
2 _______________________________________________________________________________________
Figure 1. MAX4278 EV Kit Schematic
_______________Detailed Description
Shutdown Control
Although the EV kit provides shutdown control circuitry
(J1) for other amplifiers, the MAX4278 and MAX4178
do not have a shutdown feature. Therefore, pin 8 is not
connected.
Layout Considerations
The MAX4278 EV kit layout is optimized for high-speed
signals. Careful attention was given to grounding,
power-supply bypassing, and signal path layout. Small,
surface-mount ceramic capacitors are placed as close
to the MAX4278 supply pins as possible. The N.C. pins
(pins 1 and 5) are grounded to prevent unwanted noise
from coupling into the circuit. Refer to the
Grounding
,
Bypassing
,
and PC Board Layout
section of the
MAX4178/MAX4278 data sheet for further details.
MAX4278
IN
3
2
IN
GND
U1
GND
C4
1000pF
C5
0.1µF
C2
0.1µF
C1
10µF
10V
C3
1000pF
ENABLE
SHDN*
DISABLE
* SHUTDOWN NOT APPLICABLE TO MAX4178/MAX4278
RG
0Ω
RF
OPEN
R2
75Ω
R1
75Ω
C6
10µF
10V
OUT
V+J1
3
2
4
51
6
7
8
V-
Evaluates: MAX4178/MAX4278
MAX4278 Evaluation Kit
_______________________________________________________________________________________ 3
Figure 2. MAX4278 EV Kit Component Placement Guide—
Component Side Figure 3. MAX4278 EV Kit Component Placement Guide—
Solder Side
Evaluates: MAX4178/MAX4278
MAX4278 Evaluation Kit
Figure 4. MAX4278 EV Kit PC Board Layout—Component Side Figure 5. MAX4278 EV Kit 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.
