Microchip SY89834U Bedienungsanleitung


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DESCRIPTION
â– Single power supply
â– DC-coupled inputs
â– AC-coupled outputs
â– SMA I/O connectors
â– DIP switch controlled enable function
FEATURES
2:4 SINGLE-ENDED
INPUT-TO-LVPECL FANOUT
BUFFER/TRANSLATOR
SY89834U
EVALUATION BOARD
1
Rev.: B Amendment: /0
Issue Date: August 2009
This manual provides information on the SY89834U
evaluation board. It should be used in conjunction with the
SY89834U datasheet, which contains full specifications of
the SY89834U.
The SY89834U evaluation board enables fast and
thorough evaluation of the SY89834U fanout buffer/
translator. The board is designed in multiple layers for better
performance and simpler signal evaluation.
EVALUATION BOARD
Figure 1. SY89834U Evaluation Board
The SY89834U evaluation board allows the following
measurements:
•Frequency performance
•Output eye pattern generation
•Jitter
•Output rise/fall time
•BER testing
AVAILABLE MEASUREMENTS
2
SY89834U Evaluation Board
Micrel
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
MEASUREMENT SETUP
S7
SMA
S8
SMA
C7
0.1µF
C8
0.1µF
R8
100Ω
R7
100Ω
S3
SMA
S4
SMA
S5
SMA
S6
SMA
C5
0.1µF
C6
0.1µF
C3
0.1µF
C4
0.1µF
R5
100Ω
R6
100Ω
R4
100Ω
R3
100Ω
S9
SMA
S10
SMA
1
2
3
4
5 6 7 8
Q1
/Q1
Q2
/Q2
12
11
10
9
IN1
SEL
NC
IN2
/Q0
Q0
VCC
GND
Q3
/Q3
VCC
EN
16 15 14 13
R12
0Ω
VCC
C21
220pF
C20
0.1µF
VCC
2
1
3
4
SW1
SW DIP-2
U1
SY89834U
C1
0.1µF
C2
0.1µF
R2
100Ω
C23
220pF
C22
0.1µF
VCC
R1
100Ω
S1
SMA
S2
SMA
R14
50Ω
R11, 0Ω
R10,0Ω
R13
50Ω
R9
50Ω
Agilent 86100A
Wide-Bandwidth Oscilloscope
CH1 CH2
TRIGGER
Agilent 83752A
Synthesized Sweeper
RFOUT
CLOCK INPUT
DATA OUT
/DATA OUT
Agilent 70004A
Display
Agilent 70843B
Error Performance Analyzer
Agilent E3620A
DC Power Supply
C30
0.1µF
C31
1µF
BP1
VCC
VCC
TP1
BP2
GND
+
–
Note:
Resistors R1 - R8 apply for V
CC = 3.3V.
For VCC = 2.5V, use 50Ω
Figure 2. Setup for Measurements
3
SY89834U 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
SY89834U datasheet for power supply range.
2. Set SW2 to enable device.
a. Set switch 2 off to enable device.
3. Set SW2 to choose desired input.
a. Set switch 1 off to choose IN1.
b. Set switch 1 on to choose IN2.
4. Set signal generator for appropriate output high/
low levels, data rate and bit pattern, as allowed
by the SY89834U datasheet. Connect the signal
generator's outputs to desired input on the
evaluation board. The SY89834U evaluation
board provides 50 source termination resistors.Ω
SETUP FOR MEASUREMENTS (FIGURE 2)
5. Connect desired SY89834U 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. ChooseΩ
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.


Produktspezifikationen

Marke: Microchip
Kategorie: Nicht kategorisiert
Modell: SY89834U

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