Microchip SY89833L Manual de Usario

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DESCRIPTION
Single power supply
AC-coupled I/O
SMA I/O connectors
DIP switch controlled enable function
FEATURES
1:4 ANY DIFF.
INPUT-TO-LVDS FANOUT
BUFFER/TRANSLATOR
SY89833L
EVALUATION BOARD
FINAL
1
Rev.: A Amendment: /1
Issue Date: November 2002
This manual provides information on the SY89833L
evaluation board. It should be used in conjunction with the
SY89833L datasheet, which contains full specifications of
the SY89833L.
The SY89833L evaluation board enables fast and
thorough evaluation of the SY89833L fanout buffer/translator.
The board is designed in multiple layers for better
performance and simpler signal evaluation.
EVALUATION BOARD
Figure 1. SY89833L Evaluation Board
The SY89833L evaluation board allows the following
measurements:
Frequency performance
Output eye pattern generation
Jitter
Output rise/fall time
BER testing
AVAILABLE MEASUREMENTS
2
SY89833L Evaluation Board
Micrel
MEASUREMENT SETUP
Figure 2. Setup for Measurements
Equipment used for time domain measurements:
Agilent 83752A Synthesized Sweeper
Agilent 70004A Display
Agilent 70843B Error Performance Analyzer
Agilent 86100A Wide-Bandwidth Oscilloscope
Agilent E3620A DC Power Supply
Matched high-speed cables w/SMA connectors
3
SY89833L Evaluation Board
Micrel
1. Connect power; a single power supply is used.
Connect BP1 (VCC) to +3.3V. Connect BP2
(GND) binding post to supply ground. See
SY89833L datasheet for power supply range.
2. Set SW2 to enable device.
a. Set switch 2 off to enable device.
b. Switch 1 has no effect on operation.
3. Set signal generator for appropriate output swing
amplitude, data rate and bit pattern, as allowed
by the SY89833L datasheet. There is no need to
set DC-offset as the board is AC-coupled. Ensure
the signal generator is capable of driving
AC-coupled loads. The SY89833L evaluation
board does not provide 50 source termination
resistors.
SETUP FOR MEASUREMENTS (FIGURE 2)
4. Connect desired SY89833L outputs to the
oscilloscope. Unused outputs of a switching pair
must be terminated. Ensure the oscilloscope is
triggered properly. The oscilloscope must have
internal 50 terminations to ground. Choose
desired measurements on oscilloscope.
a. Please refer to oscilloscope’s manual for eye
pattern, total jitter and rise/fall measurements.
b. For BER testing, feedback an output to the
BERT data input. After resetting the error
count, the error count should remain zero. See
BERT manual for more details.

Especificaciones del producto

Marca: Microchip
Categoría: No categorizado
Modelo: SY89833L

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