MAXIM MAX4144EVKIT

19-1151; Rev 1; 2/97
MAX4144 Evaluation Kit
_______________General Description
____________________________Features
♦ 130MHz Bandwidth (-3dB)
♦ Fully Assembled and Tested
____________________Component List
______________Ordering Information
DESIGNATION QTY
PART
MAX4144EVKIT-SO
DESCRIPTION
C1, C2,
C3, C4
4
0.1µF, 10% ceramic capacitors
Vitramon VJ1206Y104KXX
C5, C6
2
10µF, 10V, 20% tantalum capacitors
AVX TAJB106M010
Sprague 293D106X0010B
IN+, IN-, OUT
3
SMA connectors
JU1
1
3-pin header
R1, R2, R3
3
49.9Ω, 1% resistors
RG
1
Open
U1
1
MAX4144ESD
None
1
MAX4144 PC board
None
1
MAX4144 data sheet
None
1
Shunt for JU1
AVX
Sprague
Vishay/Vitramon
BOARD TYPE
Surface Mount
_________________________Quick Start
The MAX4144 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.
______________Component Suppliers
SUPPLIER
TEMP. RANGE
+25°C
PHONE
FAX
(803) 946-0690
(603) 224-1961
(203) 268-6261
(803) 626-3123
(603) 224-1430
(203) 452-5670
1) The circuit requires supply voltages of ±5V. Connect
±5V supplies to the corresponding pads marked
VCC and VEE. Connect the power-supply ground to
the pad marked GND.
2) Verify that there is a shunt across pins 1 and 2 of
jumper JU1.
3) Apply signals to IN+ and IN- whose differential
voltage does not exceed ±1.5V. These signals must
not exceed the amplifier’s input common-mode
range of ±2.8V.
4) Connect the output marked OUT to an oscilloscope
through a terminated 50Ω cable.
5) Turn on the power supply and verify the output signal on the oscilloscope.
________________________________________________________________ Maxim Integrated Products
1
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Evaluates: MAX4144
The MAX4144 evaluation kit (EV kit) simplifies evaluation of the MAX4144 high-speed differential line receiver. The EV kit circuit demonstrates the MAX4144
set to a fixed gain of 2V/V.
Evaluates: MAX4144
MAX4144 Evaluation Kit
_______________Detailed Description
Shutdown Control
The MAX4144 provides a SHDN pin to disable the output. Table 1 lists the options available for the shutdowncontrol jumper, JU1. To use an external controller, completely remove the shunt on JU1 and connect the
external controller to the pad labeled SHDN. SHDN is a
TTL/CMOS logic-level input.
Table 1. Jumper JU1 Functions
2
SHUNT
LOCATION
SHDN PIN
1&2
Connected to GND
MAX4144 enabled
2&3
Connected to VCC
Shutdown mode
MAX4144 OUTPUT
Reference
The MAX4144 REF pin is shorted to ground on the EV
board. The connection to ground can be easily broken
by cutting the PC board trace between jumper JU2’s
pads. The REF pad allows easy access to the REF pin.
Layout Considerations
The MAX4144 EV kit layout is optimized for high-speed
signals and low distortion, with careful attention given to
grounding, power-supply bypassing, and signal-path
layout. The small, surface-mount, ceramic bypass
capacitors (C1, C2, C3, and C4) are placed as close to
the four MAX4144 supply pins as possible. The ground
plane has been removed around and under the
MAX4144 to reduce stray capacitance. The removal of
ground plane around the input SMA connectors
reduces distortion.
_______________________________________________________________________________________
MAX4144 Evaluation Kit
Evaluates: MAX4144
VEE (-5V)
VCC (+5V)
C6
10µF
10V
C5
10µF
10V
U1
1
C1
0.1µF
2
INR1
49.9Ω
3
5
VCC
SHDN
3
2
1
JU1
4
6
IN+
R2
VEE (-5V)
49.9Ω
C2
0.1µF
7
VEE
IN-
N.C.
MAX4144
VCC
SENSE
N.C.
N.C.
OUT
SHDN
N.C.
IN+
REF
VEE
VCC
14
C4
0.1µF
13
12
R3
49.9Ω
11
OUT
10
9
8
REF
VCC (+5V)
JU2
C3
0.1µF
Figure 1. MAX4144 EV Kit Schematic
_______________________________________________________________________________________
3
Evaluates: MAX4144
MAX4144 Evaluation Kit
Figure 2. MAX4144 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX4144 EV Kit PC Board Layout—Component Side
Figure 4. MAX4144 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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© 1997 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.