1672.PDF

(48 KB) Pobierz
19-1151; Rev 1; 2/97
MAX4144 Evaluation Kit
_______________General Description
The MAX4144 evaluation kit (EV kit) simplifies evalua-
tion of the MAX4144 high-speed differential line re-
ceiver. The EV kit circuit demonstrates the MAX4144
set to a fixed gain of 2V/V.
____________________________Features
Evaluates: MAX4144
o
130MHz Bandwidth (-3dB)
o
Fully Assembled and Tested
____________________Component List
DESIGNATION QTY
C1, C2,
C3, C4
C5, C6
IN+, IN-, OUT
JU1
R1, R2, R3
RG
U1
None
None
None
4
DESCRIPTION
0.1µF, 10% ceramic capacitors
Vitramon VJ1206Y104KXX
10µF, 10V, 20% tantalum capacitors
AVX TAJB106M010
Sprague 293D106X0010B
SMA connectors
3-pin header
49.9Ω, 1% resistors
Open
MAX4144ESD
MAX4144 PC board
MAX4144 data sheet
Shunt for JU1
______________Ordering Information
PART
MAX4144EVKIT-SO
TEMP. RANGE
+25°C
BOARD TYPE
Surface Mount
2
3
1
3
1
1
1
1
1
_________________________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.
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 sig-
nal on the oscilloscope.
______________Component Suppliers
SUPPLIER
AVX
Sprague
Vishay/Vitramon
PHONE
(803) 946-0690
(603) 224-1961
(203) 268-6261
FAX
(803) 626-3123
(603) 224-1430
(203) 452-5670
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX4144 Evaluation Kit
Evaluates: MAX4144
_______________Detailed Description
Shutdown Control
The MAX4144 provides a SHDN pin to disable the out-
put. Table 1 lists the options available for the shutdown-
control jumper, JU1. To use an external controller, com-
pletely remove the shunt on JU1 and connect the
external controller to the pad labeled SHDN. SHDN is a
TTL/CMOS logic-level input.
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.
Table 1. Jumper JU1 Functions
SHUNT
LOCATION
1&2
2&3
SHDN PIN
Connected to GND
Connected to VCC
MAX4144 OUTPUT
MAX4144 enabled
Shutdown mode
2
_______________________________________________________________________________________
MAX4144 Evaluation Kit
Evaluates: MAX4144
VEE (-5V)
C5
10µF
10V
C6
10µF
10V
VCC (+5V)
U1
1
C1
0.1µF
2
IN-
R1
49.9Ω
3
V
EE
MAX4144
V
CC
14
C4
0.1µF
13
IN-
SENSE
N.C.
N.C.
12
R3
49.9Ω
OUT
VCC
SHDN
3
2
1
5
N.C.
OUT
11
JU1
4
SHDN
N.C.
10
IN+
R2
VEE (-5V)
49.9Ω
C2
0.1µF
6
IN+
REF
9
VCC (+5V)
JU2
REF
7
V
EE
V
CC
8
C3
0.1µF
Figure 1. MAX4144 EV Kit Schematic
_______________________________________________________________________________________
3
MAX4144 Evaluation Kit
Evaluates: MAX4144
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.
4
___________________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.

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin