UG-390 Datasheet, PDF (4/8 Pages) Analog Devices – High Speed Evaluation Board for Half-Duplex M-LVDS Transceivers

UG-390
Evaluation Board User Guide
SIGNAL
GENERATOR
3.3V POWER
SUPPLY
3.3V POWER
SUPPLY
EVAL-ADN469xEHDEBZ
RE
RO GND
J2
J1
DE ^{LK1 RO}
J3 _{A B}
DI
RE
DE
J4 LK2 DI
J9
VCC
GND
J5
B
J6
A
GND
GND
EVAL-ADN469xEHDEBZ
RE
RO GND
J2
J1
DE ^{LK1 RO}
J3 _{A B}
DI
RE
DE
J4 LK2 DI
J9
VCC
GND
J5
B
J6
A
GND
SEE NOTE
GND
OSCILLOSCOPE
NOTES
1. REPLACE 50Ω RESISTORS WITH 100Ω WHEN EVALUATING TWO BOARDS CONNECTED TOGETHER.
Figure 4. EVAL-ADN469xEHDEBZ Two Board Point-to-Point Evaluation
TEST NODE
CONTROLLER
3.3V POWER
SUPPLY
J9
RE
RO GND VCC ^GND
J2
J1
DE ^{LK1 RO}
J3 _{A B}
DI
RE
DE
J4 LK2 DI
J5
B
J6
A
GND
GND
EVAL-ADN469xEHDEBZ
R_T
AB
MASTER
AB
SLAVE
AB
R_T
SLAVE
NODE 1
NODE 2
NODE N
NOTES
1. REMOVE 50Ω TERMINATION RESISTOR FROM EVALUATION BOARD.
2. MAXIMUM NUMBER OF NODES: 32.
3. R_T IS EQUALTO THE CHARACTERISTIC IMPEDANCE OF THE CABLE USED.
Figure 5. EVAL-ADN469xEHDEBZ Application Evaluation Connected to Bus and Control Board
Table 2. Jumper Configuration
Link Connection Description
LK1 A
Connects RE to VCC (disables receiver output). Disconnect J2 input.
B
Connects RE to GND (enables receiver output). Disconnect J2 input.
None
Allows RE input on J2.
LK2 A
Connects DE to VCC (enables driver outputs). Disconnect J3 input.
B
Connects DE to GND (disables driver outputs). Disconnect J3 input.
None
Allows DE input on J3.
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