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Low Power, 3GHz, 1:2 CML Fanout Buffer / Translator w / Internal Termination

SY58051U Evaluation Board

Low Power, 3GHz, 1:2 CML Fanout Buffer / Translator w / Internal Termination
SY58051U Evaluation Board
General Description
Features
· Single +2.5V or +3.3V power supply · AC-coupled configuration for ease-of-use · Evaluation board configured to directly interface with 50 lab equipment · Evaluation board reconfigurable for DC-coupled applications · Fully assembled and tested
Related Documentation
· SY58051U, Ultra Precision CML AnyGate with Internal Input and Output Termination Data Sheet
Evaluation Board
AnyGate is a registered trademark of Micrel, Inc.
July 2004
M9999-072204 hbwhelp@micrel.com or (408) 955-1690
Micrel
SY58051U Evaluation Board
Evaluation Board Description
July 2004
M9999-072204 hbwhelp@micrel.com or (408) 955-1690
Micrel
SY58051U Evaluation Board
Evaluation Board
SY58051U CML Evaluation Board
Power Supply 2.5 / 3.3V 2.5 / 3.3V
Note: 1. 2. Default mode.
I / O Configuration AC-coupled inputs / AC-coupled Outputs
VCC +2.5 / +3.3V 0V
GND 0V 0V
VEE 0V -2.5 / -3.3V
C1-C2, C5-C6 0.1µF 0
DC-coupled inputs / DC-coupled Outputs
Table 1. SY58051U Configuration
Remove C1-C2, and C5-C6 and replace capacitors with 0 resistors.
July 2004
M9999-072204 hbwhelp@micrel.com or (408) 955-1690
Micrel
SY58051U Evaluation Board
AC-Coupled Evaluation Board Setup
Setting up the AC-coupled Evaluation Board 1. Connect +2.5V to VCC, 0V to GND and VEE for a +2.5V system or +3.3V to VCC for a +3.3V system.
5. Using equal length 50 impedance coaxial
2. Turn off the power supply. 3. Using a differential signal source set the
amplitude of each side of the differential pair to 400mV (800mV measured differentially). Set the offset to be a positive value, the value of the offset is not critical since, as the AC-coupled inputs will be automatically biased to the correct offset. Turn off or disable the outputs of the signal source.
4. Using equal length 50 impedance coaxial
cables, connect the signal source to the inputs on the evaluation board.
July 2004
M9999-072204 hbwhelp@micrel.com or (408) 955-1690
Micrel
SY58051U Evaluation Board
Bill of Materials
Item C1-C7, C9, C11 C8, C10 R5-R6 SMA1SMA6 SW VCC GND VEE U1 Part Number Vj0402Y104KXXAT 293D685X0025C2T CRCW04023001F 142-0701-851 CT2182LPST-ND 111-0702-001 111-0703-001 111-0701-001 SY58051U Manufacturer Vishay Vishay Vishay
Johnson Components Digi-Key
Jack Assembly End Launch SMA 2 Position Switch, Surface Mount
Johnson Components Johnson Components Johnson Components Micrel
Red Banana Jack Black Banana Jack White Banana Jack Low Power, 1:2 CML Fanout Buffer / Translator w / Internal Termination
Additional Components for DC-Coupled Outputs
Item C1-C6
Notes: 1. 2. 3. 4. Vishay telephone number: 402-563-6866 Johnson Components telephone number: 800-247-8256 Digikey telephone number: 800-344-4539 Micrel, Inc. telephone number: 408-944-0800
Part Number CRCW0402000Z
Manufacturer Vishay
July 2004
M9999-072204 hbwhelp@micrel.com or (408) 955-1690
Micrel
SY58051U Evaluation Board
Evaluation Board Layout
PC Board Layout Board Layout The evaluation boards are constructed with Rogers 4003 material and are coplanar in design fabricated to minimize noise, achieve high bandwidth and minimize crosstalk. L1 L2 L3 L4 GND and Signal GND VEE and VDD GND and Signal Table 2. Layer Stack
July 2004
M9999-072204 hbwhelp@micrel.com or (408) 955-1690
Micrel
SY58051U Evaluation Board
Micrel Cross Reference
Application Hints and Notes
HBW Support
Hotline: 408-955-1690 Email Support: HBWHelp@micrel.com
MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http: / www.micrel.com
July 2004
M9999-072204 hbwhelp@micrel.com or (408) 955-1690