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MAX4180 Evaluation Kit
_______________General Description
The MAX4180 evaluation kit (EV kit) simplifies evalua-
tion of the MAX4180 low-power, current-feedback
amplifier. The EV kit circuit demonstrates the MAX4180
in the noninverting, gain-of-two configuration in either
single- or dual-supply mode. RF-style SMA connectors
and 50Ω terminating resistors are included for test
equipment compatibility.
The MAX4180 EV kit uses a PC board design optimized
for high-frequency amplifiers. This board can also be
used to evaluate the MAX4181 and other Maxim ampli-
fiers that share the same pinout.
____________________________Features
o
190MHz -3dB Bandwidth (R
L
= 100Ω)
o
400V/µs Slew Rate
o
Single +5V or Dual ±5V Supply Operation
o
Adjustable Gain
o
High-Impedance Shutdown Mode
o
Fully Assembled and Tested
Evaluates: MAX4180/MAX4181
____________________Component List
DESIGNATION QTY
C1, C2
C3, C4
IN, OUT
JU1
R1, R2
RF
RG
U1
None
None
None
2
2
2
1
2
1
1
1
1
1
1
DESCRIPTION
0.1µF, 10% ceramic capacitors
10µF, 10V, 20% tantalum capacitors
AVX TAJB106M010 or
Sprague 293D106X0010B
SMA connectors
3-pin header
49.9Ω, 1% resistors
680Ω, 5% resistor
680Ω, 5% resistor
MAX4180ESA
Shunt for JU1
Single SO-8 HF amp PC board
MAX4180 data sheet
______________Ordering Information
PART
MAX4180EVKIT-SO
TEMP. RANGE
-40°C to +85°C
BOARD TYPE
Surface Mount
Note: To evaluate the MAX4181, request a MAX4181ESA free
sample.
_________________________Quick Start
The MAX4180 EV kit is fully assembled and tested.
Follow these steps to verify board operation.
1) For dual-supply operation, connect a +5V supply to
the pad labeled VCC. Connect a -5V supply to the
pad labeled VEE. Connect power-supply ground to
the pad labeled GND.
2) Verify that the shunt is across pins 1 and 2 of jumper
JU1.
3) Connect the output labeled OUT to an oscilloscope
input.
4) Turn on the power supply. Apply a ±1.0V signal to
the SMA connector labeled IN. The 100Ω load (cho-
sen for ease of evaluation) limits the output voltage
range. Wider output voltage swings are achievable
with lighter loads. See the MAX4180 data sheet.
5) Verify the output signal on the oscilloscope.
______________Component Suppliers
SUPPLIER
AVX
Sprague
PHONE
(803) 946-0690
(603) 224-1961
FAX
(803) 626-3123
(603) 224-1430
Note: Please indicate that you are using the MAX4180 when
contacting these component suppliers.
________________________________________________________________
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 408-737-7600 ext. 3468.
MAX4180 Evaluation Kit
Evaluates: MAX4180/MAX4181
_______________Detailed Description
Supply Voltage
The MAX4180 EV kit can be used in either single- or
dual-supply mode. Power-supply filter capacitors (C1,
C3) can be eliminated in your final single-supply
design.
Voltage-Gain Adjustment
The MAX4180 gain can be set by changing the feed-
back (RF) and gain-set (RG) resistors. Refer to the
MAX4180 data sheet for recommended values. The
MAX4180 is compensated for applications with a
closed-loop gain of +2 (6dB) or greater. For applica-
tions requiring a closed-loop gain of +1 (0dB), replace
the MAX4180 with a MAX4181 and change RG and RF
as outlined in Table 1 of the MAX4180 data sheet.
Shutdown Control
The MAX4180 provides a shutdown pin (SHDN) to
enable or disable the output. Table 1 lists the options
available for the shutdown control jumper, JU1. An
external controller may be used by removing the shunt
on JU1 completely and connecting the external con-
troller to the pad labeled
SHDN. SHDN
is a TTL/CMOS
logic-level input.
Layout Considerations
The PC board layout has been optimized for high-
speed signals and low distortion, with careful attention
given to grounding, power-supply bypassing, and sig-
nal-path layout. The small, surface-mount, ceramic
bypass capacitors (C1, C2) have been placed as close
to the amplifier’s supply pins as possible. The ground
plane has been removed around and under the amplifi-
er to reduce stray capacitance. Capacitance at the
inverting input pins has been minimized by reducing
the length and width of the input and feedback traces
and by using 0805-size feedback and gain-set resis-
tors.
Table 1. Jumper JU1 Functions
SHUNT
LOCATION
1 and 2
2 and 3
SHDN
PIN
Connected to VCC
Connected to GND
OUTPUT
Enabled
Disabled
1
N.C.
SHDN
8
3
2
1
JU1
SHDN
2
R
G
680Ω
IN-
MAX4180
VCC
7
C2
0.1µF
C4
10µF
10V
VCC
OUT
IN
R2
49.9Ω
3
IN+
6
R1
49.9Ω
OUT
VEE
C3
10µF
10V
C1
0.1µF
4
VEE
N.C.
5
R
F
680Ω
Figure 1. MAX4180 EV Kit Schematic
2
_______________________________________________________________________________________
MAX4180 Evaluation Kit
Evaluates: MAX4180/MAX4181
1.0"
Figure 2. MAX4180 EV Kit Component Placement Guide—
Component Side
1.0"
Figure 3. MAX4180 EV Kit PC Board Layout—Component Side
1.0"
Figure 4. MAX4180 EV Kit PC Board Layout—Solder Side
_______________________________________________________________________________________
3
MAX4180 Evaluation Kit
Evaluates: MAX4180/MAX4181
NOTES
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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