_________________________Quick Start
The MAX477 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 the +5V supply to the V+ pad, and the -5V
supply to the V- pad. Connect power-supply ground
to the pad marked GND.
2) Apply a signal of 2.0V maximum to the SMA con-
nector marked IN.
3) Connect the output marked OUT to an oscilloscope
through a terminated 75
cable.
4) Turn on the power supply and verify the output sig-
nal on the oscilloscope.
Detailed Description
Shutdown Control
Although the EV kit provides shutdown-control circuitry
(J1) for other amplifiers, the MAX477 does not have a
shutdown feature.
Voltage-Gain Adjustment
The MAX477's gain can be adjusted with minor modifi-
cations to the evaluation board:
1) Select feedback (R
F
) and gain set (R
G
) resistors
from Table 1.
2) Install R
F
and R
G
.
General Description
The MAX477 evaluation kit (EV kit) simplifies evaluation
of the MAX477, a 300MHz high-speed amplifier. Its cir-
cuit includes the MAX477 in the noninverting configura-
tion set to unity gain. RF-style connectors (SMA) and
75
terminating resistors are included for compatibility
with video test equipment.
____________________________Features
o 300MHz -3dB Bandwidth
o Optional Adjustable Gain
o Fully Assembled and Tested
Evaluates: MAX477
MAX477 Evaluation Kit
________________________________________________________________ Maxim Integrated Products
1
PART
TEMP. RANGE
IC PACKAGE
MAX477EVKIT-SO
+25C
Surface Mount
QTY
DESCRIPTION
C1, C6
2
C3, C4
2
1000pF 10% ceramic capacitors
Vitramon VJ1206Y102KXX
C2, C5
2
R1, R2
2
75
5% resistors
RF
1
IN, OUT
2
None
1
0.1F 10% ceramic capacitors
Vitramon VJ1206Y104KXX
10F 20% 10V tantalum capacitors
AVX TAJB106M010
Sprague 293D106X0010B
SUPPLIER
PHONE
FAX
AVX
803-946-0690
803-626-3123
Component Suppliers
DESIGNATION
0
resistor
SMA connectors
High-frequency amplifier PC board
Component List
Ordering Information
Table 1. Gain-Set Resistors
1
0
2
500
Open
300
500
120
5
125
500
25
10
50
450
12
GAIN
R
F
(
)
R
G
(
)
SMALL-SIGNAL
BANDWIDTH
(MHz)
19-0467; Rev. 3; 11/99
Sprague
603-224-1961
603-224-1430
Vishay/Vitramon
203-268-6261
203-452-5670
U1
1
MAX477ESA
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
Evaluates: MAX477
Layout Considerations
The MAX477 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 MAX477 supply pins as possible. No-Connect
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
MAX477 data sheet for further details.
MAX477 Evaluation Kit
2
_______________________________________________________________________________________
MAX477
IN
SHDN
ENABLE
DISABLE
U1
GND
C4
1000pF
C5
0.1
F
C2
0.1
F
C1
10
F
10V
C3
1000pF
RG
OPEN
RF
0
R2
75
R1
75
C6
10
F
10V
OUT
V+
J1
1
2
3
3
2
4
5
1
6
7
8
V-
SHDN NOT APPLICABLE FOR MAX477
Figure 1. MAX477 EV Kit Schematic
Evaluates: MAX477
MAX477 Evaluation Kit
_______________________________________________________________________________________
3
Figure 2. MAX477 EV Kit Component Placement Guide--
Component Side
Figure 3. MAX477 EV Kit Component Placement Guide--
Solder Side
Figure 4. MAX477 EV Kit PC Board Layout--Component Side
Figure 5. MAX477 EV Kit PC Board Layout--Solder Side
Evaluates: MAX477
MAX477 Evaluation Kit
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.
4 _____________________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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