SY89851U Evaluation Board SY89851U evaluation board designed conv

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SY89851U Evaluation Board SY89851U evaluation board designed conv

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Power, 3GHz, LVPECL Fanout Buffer/Translator Internal Termination
SY89851U Evaluation Board
SY89851U evaluation board designed convenient setup quick evaluation device. boards optimized interface directly oscilloscope. default evaluation board configuration ACcoupled. applications that requires DC-coupled mode, instructions modifying board included. Data sheets support documentation found Micrel's site www.micrel.com.
Features
SY89851U Single +2.5V +3.3V power supply AC-coupled input output configuration easy evaluation Evaluation board re-configurable DC-coupled output Fully assembled tested
Related Documentation
SY89851U, Power, 3GHz, LVPECL Fanout Buffer/Translator with Internal Termination Data Sheet
Evaluation Board
August 2004
M9999-082404 hbwhelp@micrel.com (408) 955-1690
Micrel
SY89851U Evaluation Board
Evaluation Board Description
AC-Coupled Evaluation Board SY89851U packaged 16-pin MLFTM. SY89851U evaluation board designed operate with single 2.5V±5% 3.3V±10% power supply configured AC-coupled mode. high-speed input channels brought connectors through matched length AC-coupled differential strip-line traces. DC-operating point VCC-1.3V VREF-AC output pin, which connected input device. outputs brought connectors through matched length AC-coupled differential strip-line traces, which allow board interface directly with equipment. Although evaluation board's default mode AC-coupled evaluation board reconfigured DC-coupled mode modifying board. AC-Coupled Input recommended that input left AC-coupled input mode ease use. this mode, signals will automatically bias correct DC-operating point, which VCC-1.3V since VREF-AC connected input. Therefore, inputs driven differential signal small 100mV (200mVpp) without level shifting termination resistor network signal path.
DC-Coupled Evaluation Board SY89851U evaluation board configured DC-coupled mode removing capacitors C8-C11 replacing components with resistors.
Interfacing Equipment
Interfacing board equipment DCcoupled mode involves using split supplies. 2.5V Split Supply Configuration: 1.2V -1.3V
3.3V Split Supply Configuration: 1.2V -2.1V
Interfacing LVPECL Systems
Interfacing DC-coupled output LVPECL system requires single power supply source. Single Power Supply Setup: 2.5/3.3V Single-ended scope Unused compliment output should terminated into ground. Unused output pairs Unused pairs left floating with impact jitter.
Unused outputs
August 2004
M9999-082404 hbwhelp@micrel.com (408) 955-1690
Micrel
SY89851U Evaluation Board
Evaluation Board
SY89851U AC-Coupled LVPECL Evaluation Board
Supply Voltage 2.5V/3.3V 2.5V 3.3V
AC-Coupled Input/AC-Coupled Output
2.5/3.3V 1.2V 1.2V
-1.3V -2.1V
C8-C11 0.1µF
AC-Coupled Input/DC-Coupled Output AC-Coupled Input/DC-Coupled Output
Table SY89851U Evaluation Board Setup
Note: Default setting. Remove capacitors C8-C11 replace with 0402 resistors.
August 2004
M9999-082404 hbwhelp@micrel.com (408) 955-1690
Micrel
SY89851U Evaluation Board
AC-Coupled Evaluation Board Setup
Setting Evaluation Board following steps describe procedure setting evaluation board: 3.3V, turn supply. Using differential signal source amplitude 400mV (single-ended) 800mV (differential). offset positive value, value offset critical, since AC-coupled inputs will automatically bias voltage. Turn disable outputs signal source. Using equal length impedance coaxial cables, connect signal source inputs evaluation board. Using equal length impedance coaxial cables, connect outputs evaluation board oscilloscope other equipment with internal termination. Enable signal source monitor outputs.
August 2004
M9999-082404 hbwhelp@micrel.com (408) 955-1690
Micrel
SY89851U Evaluation Board
Bill Materials
Item C5-C11 SMA1-SMA6
Notes: Vishay: www.vishay.com Johnson Components: www.johnsoncomponents.com Digi-Key: www.digikey.com Micrel: www.micrel.com
Part Number VJ0402Y104KXXAT 293D685X0010 111-0703-001 111-0702-001 111-0701-001 CT2182LPST-ND 142-0701-851 SY89851U
Manufacturer Vishay
Description 0.1µF, 25V, Ceramic Capacitor, Size 0402, Dielectric 6.8µF, 20V, Tantalum Electrolytic Capacitor, Size Black Banana Jack Banana Jack White Banana Jack 2-Position Jack Assembly Launch Power, 3GHz, LVPECL Fanout Buffer/Translator with Internal Termination
Qty.
Vishay(1) Johnson Components(2) Johnson Components(2) Johnson Components(2) Digi-Key Johnson Components(2) Micrel(4)
August 2004
M9999-082404 hbwhelp@micrel.com (408) 955-1690
Micrel
SY89851U Evaluation Board
Evaluation Board Layout
Board Layout evaluation boards constructed with Rogers 4003 material coplanar design fabricated minimize noise, achieve high bandwidth minimize crosstalk.
Layer SY89851U Signal
Table Layer Stack
August 2004
M9999-082404 hbwhelp@micrel.com (408) 955-1690
Micrel
SY89851U Evaluation Board
Micrel Cross Reference
find equivalent Micrel part, Micrel's website http://www.micrel.com following steps below: Click Dynamic Cross Reference Enter competitor's part number Dynamic Cross Reference field download version this information, click Cross Reference
Application Hints Notes
application notes high speed termination PECL LVPECL products, clock synthesizer products, SONET jitter measurement, other High Bandwidth product Micrel's website http://www.micrel.com/. Once Micrel's website, follow steps below: Click "Product Info". Applications Information Box, choose "Application Hints Application Notes."
Support
Hotline: 408-955-1690 Email Support: HBWHelp@micrel.com
MICREL, INC. 1849 FORTUNE DRIVE JOSE, 95131
(408) 944-0800 (408) 474-1000 http:/www.micrel.com
information furnished Micrel this data sheet believed accurate reliable. However, responsibility assumed Micrel use. Micrel reserves right change circuitry specifications time without notification customer. Micrel Products designed authorized components life support appliances, devices systems where malfunction product reasonably expected result personal injury. Life support devices systems devices systems that intended surgical implant into body support sustain life, whose failure perform reasonably expected result significant injury user. Purchaser's sale Micrel Products life support appliances, devices systems Purchaser's risk Purchaser agrees fully indemnify Micrel damages resulting from such sale. 2004 Micrel, Incorporated.
August 2004
M9999-082404 hbwhelp@micrel.com (408) 955-1690

SY89851U Evaluation Board SY89851U evaluation board designed conv

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