Analog Devices EVAL-ADM2582EEMIZ, Руководство пользователя

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EVAL-ADM2582EEMIZ/EVAL-ADM2587EEMIZ User Guide UG-916
Rev. 0 | Page 3 of 12
EVALUATION BOARD HARDWARE
TEST SETUP
The ADM2582E / 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 A to Y pins and B to Z pins, 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 jumper blocks on the LK1, LK3, and LK6 jumper
blocks because the input sources may be shorted 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-ADM2582EEMIZ/87EEMIZ
OSCILLOSCOPE
SIGNAL
GENERATOR
GND
GND
LK1
LK9
C
B
A
C
B
A
14003-
002
3.3V OR 5V
POWER
SUPPLY
Figure 2. Basic Operation of the EN55022 Class A Compliant Evaluation Board for the ADM2582E / ADM2587E Isolated RS-485/RS-422 Transceivers
Table 1. Jumper Configuration
Link Connection Description
LK1 A Connects the driver enable input (DE) of the ADM2582E / ADM2587E to 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 GND
1
pin. This setting disables the driver.
LK6 A Connects the receiver enable input (RE) of the ADM2582E / ADM2587E to 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 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.