UG-1677
One
Technology
Way
•
P.O.
Box
9106
•
Norwood,
MA
02062-9106,
U.S.A.
•
Tel:
781.329.4700
•
Fax:
781.461.3113
•
www.analog.com
Evaluating the 5.7 kV RMS
Signal and Power Isolated
RS-485 Transceiver with ±15 kV IEC ESD
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 12
FEATURES
Simplified evaluation of the 25 Mbps
RS-485 transceiver
2-layer PCB compliant to EN 55032 Class B radiated emissions
Footprint for 10.15 mm × 10.05 mm, 28-lead SOIC_W_FP
package with >8.0 mm creepage and clearance
On-board
LDO regulator with jumper options for
simplified evaluation in 5 V or 3.3 V configuration
Flexible, low voltage V
IO
supply rail to interface with I/O
nodes as low as 1.7 V
Selectable 3.3 V or 5 V isolated supply voltage options available
IEC 61000-4-2 ESD protection on the A, B, Y, and Z pins
±12 kV contact discharge and ±15 kV air discharge
SMA connector for high speed 25 Mbps TxD input signal
Optional on-board
oscillator to provide TxD
input signal
Screw terminal blocks for power connections, digital signals,
and RS-485 signals
Jumper-selectable enable and disable for digital input signals
Resistors and footprints for termination and loopback test
Test points to measure all signals
EVALUATION KIT CONTENTS
EVAL-ADM2867EEBZ
EQUIPMENT NEEDED
Oscilloscope
Signal generator
3.0 V to 5.5 V supply
1.62 V to 5.5 V supply
DOCUMENTS NEEDED
data sheet
GENERAL DESCRIPTION
The EVAL-ADM2867EEBZ allows the simplified, efficient
evaluation of the 5.7 kV rms
signal and power
isolated RS-485 transceiver.
features an integrated, isolated, dc-to-dc converter
that provides power to the isolated side of the device with no
additional ICs required.
low dropout (LDO) regulator accepts
an input voltage of 3.3 V to 20 V and regulates the voltage to a
selectable 3.3 V or 5 V supply for the V
CC
pin of the
The LDO regulator can be bypassed to power the V
CC
pin of the
directly.
A flexible logic V
IO
supply allows the device to operate with a
digital input/output (I/O) voltage from 1.7 V to 5.5 V, which
enables communication with modern nodes using either a 1.8 V
or 2.5 V power supply. The V
IO
pin can also be supplied from
the
regulated supply.
The EVAL-ADM2867EEBZ comes with options to evaluate the
in an individual system. Digital and RS-485 bus
signals are accessible via the screw terminal blocks on the EVAL-
ADM2867EEBZ. Each digital input can be configured via the
on-board jumper options.
Alternative methods can provide the transmit data input (TxD)
signal to the device. An optional
oscillator is included
on the EVAL-ADM2867EEBZ and can be configured to provide a
clock signal as the TxD digital input within a 1 kHz to 20 MHz
range. For optimal signal integrity, use the on-board Subminiature
Version A (SMA) connector to connect an external TxD signal at
high data rates up to 25 Mbps.
The EVAL-ADM2867EEBZ has a footprint for the full duplex,
isolated, RS-485 transceiver in a 10.15 mm × 10.05 mm, 28-lead,
small outline, wide body with fine pitch (SOIC_W_FP) package.
The EVAL-ADM2867EEBZ is populated with the
5.7 kV rms, isolated RS-485 transceiver.
For full details on the
data sheet,
which must be used in conjunction with this user guide when
using the EVAL-ADM2867EEBZ.
