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MAX4447 Evaluation Kit
General Description
The MAX4447 evaluation kit (EV kit) simplifies evaluation
of the MAX4447 high-speed differential line driver. The
EV kit includes the MAX4447, which has a fixed gain of
+2V/V, but it can also be used to evaluate the
adjustable-gain MAX4448 (stable with a minimum gain
of +2V/V) or the MAX4449 (stable with a minimum gain
of +5V/V). To evaluate the MAX4448 or MAX4449, order
a free sample of the MAX4448ESE or MAX4449ESE
along with the MAX4447 EV kit.
o
6500V/µs Slew Rate
o
Proven PC Board Layout
o
Fully Assembled and Tested Surface-Mount
Board
Features
o
430MHz Full-Power Bandwidth (MAX4447)
Evaluates: MAX4447/MAX4448/MAX4449
Component List
DESIGNATION QTY
C1, C3
C2, C4
R1, R2, R3
RG
JU1
None
IN, OUT-,
OUT+
U1
None
None
None
2
2
3
0
1
1
3
1
1
1
1
DESCRIPTION
4.7µF ±20%, 10V tantalum capacitors
AVX TAJA475M010R
0.1µF ceramic capacitors
49.9Ω ±1% resistors
Not installed
2-pin header
Shunt (JU1)
SMA connectors
MAX4447ESE
MAX4447 EV kit PC board
MAX4447 EV kit data sheet
MAX4447/MAX4448/MAX4449
data sheet
PART
MAX4447EVKIT
Ordering Information
TEMP. RANGE
0°C to +70°C
IC PACKAGE
16 SO
Quick Start
The MAX4447 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) Connect a +5V power supply to the V
CC
pin and
a -5V power supply to the V
EE
pin. Connect power-
supply ground to the GND pads.
2) Ensure that the shunt is removed from jumper JU1.
3) Apply a signal of up to +1.5V peak to the SMA
connector marked IN.
4) Connect the output marked OUT+ to a 50Ω terminated
oscilloscope input, and connect the output marked
OUT- to another 50Ω terminated oscilloscope input.
5) Turn on the power supply and verify the output sig-
nals on the oscilloscope. The output amplitude at
either of the two outputs (VOUT+, VOUT-) observed
on the oscilloscope will be the same as that on the
input. This is due to the multiplication of the +2 gain
with the voltage divider formed by the 49.9Ω back-ter-
minating resistor (R3) and the oscilloscope input termi-
nation. Note that the differential output (defined as
VOUT+ - VOUT-) will be twice the amplitude of the
input.
Component Suppliers
SUPPLIER
AVX
PHONE
803-946-0690
FAX
803-626-3123
Note:
Please indicate that you are using the MAX4447,
MAX4448, or MAX4449 when contacting the component
supplier above.
________________________________________________________________
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.
MAX4447 Evaluation Kit
Evaluates: MAX4447/MAX4448/MAX4449
Detailed Description
Enable Control
The MAX4447 provides an enable pin (EN) to enable or
disable the output. Table 1 lists the options available for
the enable/disable control jumper, JU1. EN is a TTL/
CMOS-logic level input.
Evaluating the MAX4448 or MAX4449
To evaluate the MAX4448 or MAX4449, turn off the
power to the EV kit. Replace the MAX4447 with a
MAX4448ESE or MAX4449ESE, and install a gain-set-
ting resistor R
G
(0805, 1%) according to the following
formula:
300
Ω
R
G
=
G / 2-1
Note that the gain must be at least +2V/V for the
MAX4448 and must be at least +5V/V for the MAX4449
for the amplifier to be stable.
Layout Considerations
The MAX4447 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 (C2, C4) have been placed as close to the
MAX4447 supply pins as possible. Signal traces have
been kept as short as possible by using 0805-sized ter-
mination and gain-set resistors.
Table 1. Jumper JU1 Functions
SHUNT
Installed
Not installed
MAX4447
ENABLE PIN
Connected to GND
Floating (internally
pulled up)
MAX4447
OUTPUT
MAX4447 in
shutdown
MAX4447 enabled
VCC
C1
4.7µF
10V
C2
0.1µF
1
2
V
CC
V
CC
GND
16
R2
49.9Ω
1%
OUT-
U1
MAX4447
OUT- 15
V
EE
14
13
12
11
10
3
R
G
OPEN
4
N.C.
N.C.
V
EE
V
EE
VEE
IN
R1
49.9Ω
1%
5
6
IN
N.C.
V
EE
OUT+
R3
49.9Ω
1%
OUT+
JU1
7
VEE
C3
4.7µF
10V
C4
0.1µF
8
V
EE
V
EE
SHDN
9
GND
Figure 1. MAX4447 EV Kit Schematic
2
_______________________________________________________________________________________
MAX4447 Evaluation Kit
Evaluates: MAX4447/MAX4448/MAX4449
1.0"
Figure 2. MAX4447 EV Kit Component Placement Guide—
Component Side
1.0"
Figure 3. MAX4447 EV Kit PC Board Layout—Component Side
1.0"
Figure 4. MAX4447 EV Kit PC Board Layout—Solder Side
_______________________________________________________________________________________
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MAX4447 Evaluation Kit
Evaluates: MAX4447/MAX4448/MAX4449
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
© 1999 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.

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