Microchip SY89833AL Handleiding


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SY89833AL
Evaluation Board
3.3V Low Noise Ultra-Precision 1:4 LVDS
Fanout Buer/Translator with Internal
Termination
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 2009 M9999-043009-A
hbwhelp@micrel.com or (408) 955-1690
General Description
The SY89833AL evaluation board is designed for
convenient set-up and quick evaluation. It allows the user
to evaluate the part over the full voltage-range without
requiring any modification to the board.
The evaluation board standard configuration is AC-coupled
input with AC-coupled outputs for direct interface to a 50Ω-
compatible oscilloscope.
All datasheets and support documentation can be found at
Micrel’s web site at: www.micrel.com.
Features
• SY89833AL LVDS outputs
• Single 3.3V power supply
• AC-coupled configuration for ease-of-use
• I/O interface includes on-board termination
• Fully assembled and tested
• Reconfigurable for DC-coupled operation
Applications
• SY89833AL 3.3V Low Noise Ultra-Precision 1:4 LVDS
Fanout Buffer/Translator with Internal Termination
___________________________________________________________________________________________________________
Evaluation Board
Micrel, Inc. SY89833AL Evaluation Board
April 2009 2 M9999-043009-A
hbwhelp@micrel.com or (408) 955-1690
Evaluation Board Description
AC-Coupled Evaluation Board
(AC-Coupled Input, AC-Coupled Output)
The SY89833AL evaluation board is designed to accept
an AC-coupled input with AC-coupled outputs.
The AC-coupled conguration is suited for most
customer applications and is preferred by the majority of
users because of its ease-of-use. It requires only a
single power supply and offers the most flexibility when
interfacing to a variety of signal sources.
The DC-bias levels and AC-coupling capacitors are
supplied on-board for the input. The user only needs to
supply a minimum input voltage swing and the bias
voltage will automatically adjust the input to the correct
level as the power supply voltage varies.
AC-Coupled Evaluation Board Setup
(AC-Coupled Input, AC-Coupled Output)
Setting up the SY89833AL AC-Coupled Evaluation
Board
The following steps describe the procedure for setting up
the evaluation board:
1. Set the voltage setting for a DC supply to be
3.3V.
2. On the evaluation board, short the GND terminal
to the VEE terminal and connect them to the
negative side of the DC power supply.
3. Connect the VCC terminal to the positive side of
the DC power supply.
4. Turn on the power supply and verify that the
power supply current is <140mA.
5. Turn off the power supply.
6. Using a differential signal source, set the
amplitude of each side of the differential pair to
be 800mV (1600mV measured differentially).
The offset is not critical, as the AC-coupled
inputs will be automatically biased to the correct
offset. Turn off or disable the outputs of the
signal source.
7. To enable the Q0-Q3 outputs, use the SW2
switch. To enable the outputs, set SW2 to HIGH
and to disable to a LOW. See Table 1 below.
EN Q Output
0 Logic Low
1 Data
Table 1. Output Enable/Disable
8. Using equal length 50Ω impedance coaxial
cables connect the signal source to the SMA
inputs on the evaluation board.
9. Using equal length 50Ω impedance coaxial
cables connect the desired output/outputs of the
evaluation board to the oscilloscope or other
measurement device that has an internal 50Ω
termination. Terminate all unused outputs into
50Ω.
10. Turn on the power and verify the current is
<140mA.
11. Enable the signal source and monitor the
output/outputs.
Micrel, Inc. SY89833AL Evaluation Board
April 2009 3 M9999-043009-A
hbwhelp@micrel.com or (408) 955-1690
Evaluation Board
SY89833AL AC-Coupled Evaluation Board
Power Supply VCC GND VEE I/O
3.3V 3.3V 0V 0V AC-Coupled Input/AC-Coupled Output
Table 2. SY89833AL AC-Coupled Evaluation Board Power Supply Connections


Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: SY89833AL

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