Download Evaluates: M MAX3982 Evaluation Kit _______________ General Description

19-0026; Rev 0, 10/04
MAX3982 Evaluation Kit
_______________ General Description
____________________ Component List
DESIGNATION QTY
C1
DESCRIPTION
♦
Fully Assembled and Tested
♦
Easy Selection of Operating Modes
______________ Ordering Information
PART
MAX3982EVKIT
1
33µF tantalum capacitor
C2, C3, C8
3
0.1µF ±10% ceramic
capacitors (0402)
C4 - C7
4
0.01µF ±10% ceramic
capacitors (0402)
SUPPLIER
J1-J4
4
SMA connectors, tab
contact, edge mount
J6, J10,
TP1 – TP3
5
Test points
Digi-Key 5000K-ND
JU1 – JU3,
JU5, JU6
5
2-pin headers, 0.1in centers
JU4
JU1 – JU6
1
6
3-pin header, 0.1in centers
Shunts
L1
1
4.7µH inductor
Coilcraft 1008CS-472XJB
R1
1
4.7kΩ ±5% resistor (0402)
U1
1
MAX3982UTE 16-pin QFN
None
MAX3982 evaluation circuit
board, rev A
None
MAX3982 data sheet
TEMP. RANGE
0°C to +85°C
IC PACKAGE
16 QFN
______________Component Suppliers
AVX
PHONE
843-448-9411
FAX
843-448-1943
Digi-Key
218-681-6674
218-681-3380
Murata
770-436-1300
770-436-3030
Note: Please indicate that you are using the MAX3982
when ordering from these suppliers.
________________________ Quick Start
1)
Connect a +3.3V supply to the +3.3V terminal and
ground to GND.
2)
Install shunt at jumper JU4 in “ENABLE” position to
enable the output.
3)
Apply 1Gbps to 4.25Gbps data to IN+ and IN- (J1
and J2).
4)
Connect OUT+ and OUT- to a 50 ohm-terminated
oscilloscope.
5)
Shunt JU5 (LOS PULLUP) to terminate the LOS
output with 4.7kΩ to VCC.
6)
Adjust pre-emphasis with jumpers JU2 and JU3
(PE1 and PE0).
7)
Select output amplitude with jumper JU1 (OUTLEV).
8)
Monitor LOS output at TP1 and select LOS
sensitivity with JU6 (LOSLEV).
_________________________________________________________________Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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1
Evaluates: MAX3982
The MAX3982 evaluation kit (EV Kit) is an assembled
demonstration board that provides electrical evaluation of
the MAX3982 SFP Copper-Cable Preemphasis Driver.
All control inputs are adjustable by jumpers, and LOS is
available through a test point.
_________________________Features
MAX3982 Evaluation Kit
Evaluates: MAX3982
_______________________________________________
NAME
TYPE
OUTLEV (JU1)
2-pin header
PE1 (JU2)
2-pin header
PE0 (JU3)
2-pin header
SHUNT POSITION
OPEN
SHUNT (GND)
LOS PULLUP
(JU5)
2-pin header
LOSLEV (JU6)
2-pin header
LOS (TP1)
Selects reduced output swing
SHUNT (GND)
Disables most significant bit of pre-emphasis control
OPEN
Enables least significant bit of pre-emphasis control
SHUNT (GND)
AUTO
OPEN
SHUNT (VCC)
Test Point
Selects maximum output swing
Enables most significant bit of pre-emphasis control
ENABLE
3-pin header
DESCRIPTION
OPEN
OPEN
TX_DISABLE
(JU4)
Jumper and Test Point Descriptions
Disables least significant bit of pre-emphasis control
Disables data output
Enables data output
Enables autodetect by connecting LOS to TX_DISABLE.
JU5 must be shunted or an external voltage (3.0V to 5.5V)
must be present on pin 1 of JU5 for proper operation of
autodetect.
Allows external voltage (3.0V to 5.5V) applied at pin 1 of
JU5 as LOS pullup voltage
Sets VCC as the LOS resistor pullup voltage
OPEN
Sets LOS threshold to lower sensitivity (higher threshold)
SHUNT (GND)
Sets LOS threshold to higher sensitivity (lower threshold)
-
Monitors the Loss-of-Signal output. LOS will be low when
the input signal level is valid and JU5 is either shunted or
an external voltage (3.0V to 5.5V) is present at pin 1 of
JU5.
2 _________________________________________________________________________________________
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MAX3982 Evaluation Kit
4.7µH
C2
0.1µF
13
VCC2
14
TX_DISABLE
LOS
MAX3982
IN-
OUT-
U1
GND
5
4
OUT+
GND
JU1
OUTLEV
JU2
PE1
PE0
3
0.01µF
C8
0.1µF
VCC2
IN+
7
2
PE1
J2
0.1µF
C4
0.01µF
C5
VCC1
6
IN-
J1
1
15
16
C3
LOSLEV
EP*
VCC
IN+
VCC
JU6
LOSLEV
TP3
GND
OUTLEV
C1
33µF
J10
GND
JU4
TX_DISABLE
AUTO
ENABLE
VC C
12
J3
11
10
C6
0.01µF
C7
0.01µF
J4
OUT+
OUT-
9
GND
J6
+3.3V
VCC
TP1
LOS
R1
4.7kΩ
8
L1
JU5
LOS PULLUP
Evaluates: MAX3982
VCC
TP2
VCC
JU3
PE0
*EP = EXPOSED PAD, SOLDERED TO GROUND
1.85in
Figure 1. MAX3982 EV Kit Schematic
2.69in
Figure 2. MAX3982 EV Kit Component Placement Guide – Component Side
_________________________________________________________________________________________
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3
Evaluates: MAX3982
MAX3982 Evaluation Kit
Figure 3. MAX3982 EV Kit PC Board Layout – Component Side, Layer 1
Figure 4. MAX3982 EV Kit PC Board Layout – Ground Plane, Layer 2
4 _________________________________________________________________________________________
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MAX3982 Evaluation Kit
Evaluates: MAX3982
Figure 5. MAX3982 EV Kit PC Board Layout – Power Plane, Layer 3
Figure 6. MAX3982 EV Kit PC Board Layout – Bottom, Layer 4
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5
 2004 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products
www.BDTIC.com/maxim