EVAL-ADM2582EEBZ/EVAL-ADM2587EEBZ User Guide
UG-044
Rev. D | Page 3 of 13
EVALUATION BOARD HARDWARE
TEST SETUP
The
EVAL-ADM2582E
/
EVAL-ADM2587E
evaluation board is
shown in Figure 2 with the default jumper settings on the LK1
through LK9 jumper blocks. In the default jumper connections,
both the
ADM2582E
/
ADM2587E
driver and receiver are enabled.
Figure 2 also shows the power connection on the J2 terminal
block, input signal connection on the DI jack, and probes attached
to the RXD, DI, Y, and Z test points for a loopback test (LK5 and
LK7 are closed to connect the A pin to Y pin and B pin to Z pin,
respectively).
JUMPER SETTINGS
The inputs to the
ADM2582E
/
ADM2587E
can be configured
using the jumpers on the evaluation board (see Table 1). Do not
place multiple jumpers on the LK1, LK6, and LK9 jumper blocks
because doing so can short the import sources together. For each
link, a single jumper block can move from one position to
another, as specified in Table 1.
C
B
A
RXD
RE
DE
DI
RXD
RE
DE
DI
A
B
Z
Y
DI
A
B
Z
Y
LK5
GND1
SHIELD
GND2
VDD
J3
J2
J4
LK6
LK3
LK7
EVAL-ADM2582EEBZ/2587EEBZ
OSCILLOSCOPE
SIGNAL
GENERATOR
GND
GND
LK1
LK9
C
B
A
C
B
A
08420-
002
3.3V OR 5V
POWER
SUPPLY
Figure 2. Basic Operation of the EN55022 Class B Compliant Evaluation Board for the
ADM2582E
/
ADM2587E
Isolated RS-485/RS-422 Transceivers
Table 1. Jumper Configurations
Link
Connection
Description
LK1
A
Connects the driver enable input (DE) of the
ADM2582E
/
ADM2587E
to the V
CC
pin. This setting enables the driver.
B
Connects the driver enable input (DE) of the
ADM2582E
/
ADM2587E
to the DE J3 terminal block connector.
C
Connects the driver enable input (DE) of the
ADM2582E
/
ADM2587E
to the GND
1
pin. This setting disables the driver.
LK6
A
Connects the receiver enable input (RE) of the
ADM2582E
/
ADM2587E
to the V
CC
pin. This setting disables the receiver.
B
Connects the receiver enable input (RE) of the
ADM2582E
/
ADM2587E
to the RE J3 terminal block connector.
C
Connects the receiver enable input (RE) of the
ADM2582E
/
ADM2587E
to the GND
1
pin. This setting enables the receiver.
LK3
Closed
Connects the receiver enable input (RE) of the
ADM2582E
/
ADM2587E
to the driver enable input (DE). This setting
ensures that when the driver is enabled, the receiver is disabled, or when the driver is disabled, the receiver is enabled.
LK9
A
Connects the TxD pin of the
ADM2582E
/
ADM2587E
to the DI connector.
B
Connects the TxD pin of the
ADM2582E
/
ADM2587E
to the DI J3 terminal block connector.
C
Connects the TxD pin of the
ADM2582E
/
ADM2587E
to the on-board oscillator circuit.
LK5
Closed
Connects the
ADM2582E
/
ADM2587E
Receiver Input B to Driver Output Z. When LK5 and LK7 are both connected,
the evaluation board is configured for half-duplex operation.
Open
When LK5 and LK7 are both open, the evaluation board is configured for full-duplex operation.
LK7
Closed
Connects the
ADM2582E
/
ADM2587E
Receiver Input A to Driver Output Y. When LK5 and LK7 are both connected, the
evaluation board is configured for half-duplex operation.
Open
When LK5 and LK7 are both open, the evaluation board is configured for full-duplex operation.
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