Electrical Evaluation Board

SY84402L
Electrical Evaluation Board
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General Description
Features
This electrical evaluation board allows for checking the
performance of the SY84402L VCSEL driver while
driving passive load.
Datasheets and support documentation can be found on
Micrel's web site at: www.micrel.com.
•
Manual modulation setting
Related Support Documentation
•
SY84402L Datasheet
_______________________________________________________________________________________________________
Evaluation Board
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
December 2009
M9999-122309-A
hbwhelp@micrel.com or (408) 955-1690
Micrel, Inc.
SY84402L Electrical Evaluation Board
Evaluation Board Setting and Operation
Performance
1. The driver is on by default. To disable it install
a jumper on J7.
2. Turn R1 completely clockwise to set the
modulation to its minimum (VCTRL=VCC).
3. Connect the input IN (J1) and /IN (J2) to the
output of the pattern generator.
4. Connect the output Q (J4) and /Q (J3) to the
scope.
5. Connect 3.3V to J5 (red) and GND to J6
(black) to power the board.
6. Turn R1 counter-clockwise to increase
modulation current. The modulation current is
given by:
IMOD = Eye amplitude / RLoad
7. To reverse the output data polarity install a
jumper on J8. Note that polarity reversal also
inverts the polarity of enable function from /EN
to EN.
December 2009
2
M9999-122309-A
hbwhelp@micrel.com or (408) 955-1690
Micrel, Inc.
SY84402L Electrical Evaluation Board
Evaluation Board Schematics
December 2009
3
M9999-122309-A
hbwhelp@micrel.com or (408) 955-1690
Micrel, Inc.
SY84402L Electrical Evaluation Board
PCB Layout/Assembly
December 2009
4
M9999-122309-A
hbwhelp@micrel.com or (408) 955-1690
Micrel, Inc.
SY84402L Electrical Evaluation Board
Bill of Materials
Item
Part Number
Manufacturer
(1)
Description
Qty.
0.1µF Ceramic Capacitor, Size 0402
9
10µF Tantalium Solid Electrolytic Capacitor, Y
1
Johnson
Components(3)
SMA End Launch Receptacle Connector
4
L1
Vishay(1)
1.2µH Ferrite Bead Inductor, Size 1206
1
R7
(1)
0Ω Resistor
1
(1)
100Ω Resistor
2
(1)
5kΩ Resistor
3
(6)
50K SMD Trimming Potentiometer
1
Header, 2 Positions
2
Color Coded PCB Test Point, Red
1
Color Coded PCB Test Point, Black
1
4.25Gbps VCSEL Driver
1
C1-7, C9-10
Vishay
C8
ECSH0GY106R
J1-4
142-0701-851
R2-3
R4-6
CRCW04020R00F
CRCW04021000F
CRCW04025001F
Panasonic
(2)
Vishay
Vishay
Vishay
R1
3269 W-1-503 GLF
Bourns
J7-8
TSW-1-2-07-G-S
Samtec(4)
J5
5010
Keystone(5)
5011
(5)
J6
U1
Keystone
SY84402L
(7)
Micrel, Inc.
Notes:
1. Vishay: www.vishay.com.
2. Panasonic: www.panasonic.com.
3. Johnson components: www.johnsoncomponents.com.
4. Samtec: www.samtec.com.
5. Keystone: www.keyelco.com.
6. Bourns: www.bourns.com.
7. Micrel, Inc.: www.micrel.com.
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for
its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a
product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for
surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant
injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk
and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale.
© 2009 Micrel, Incorporated.
December 2009
5
M9999-122309-A
hbwhelp@micrel.com or (408) 955-1690