EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z
User Guide
UG-1131
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 ADM3066E 3.0 V to 5.5 V, ±12 kV IEC ESD Protected, 50 Mbps RS-485
Transceiver
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 9
FEATURES
Easy evaluation of ADM3066E 50 Mbps RS-485 transceiver
Board layouts for standard half-duplex RS-485 footprints
10-lead MSOP, ADM3066EBRMZ (EVAL-ADM3066EEBZ)
10-lead LFCSP, ADM3066EBCPZ (EVAL-ADM3066EEB1Z)
Power/ground connections through screw terminal block
3.0 V to 5.5 V operating voltage range on VCC
1.62 V to 5.5 V VIO logic supply
IEC ESD protection on the RS-485 A and B bus pins
±12 kV contact discharge and ±12 kV air gap discharge
Screw terminal blocks for logic input/output and RS-485 signals
Jumper-selectable enable/disable for RE and DE
Test points for measuring all signals
Resistors and footprints for termination and biasing networks
EVALUATION KIT CONTENTS
EVAL-ADM3066EEBZ or EVAL-ADM3066EEB1Z
ADDITIONAL EQUIPMENT NEEDED
Oscilloscope
Signal generator or universal asynchronous
receiver/transmitter (UART)
3 V to 5 V supply
GENERAL DESCRIPTION
The EVAL-ADM3066EEBZ and EVAL-ADM3066EEB1Z allow
quick and easy evaluation of the ADM3066E 50 Mbps RS-485
transceiver with standard MSOP and LFCSP footprints,
respectively. The evaluation boards allow the input and output
functions to be exercised without external components. Screw
terminal blocks provide convenient connections for power and
ground, digital input and output, and RS-485 signals. The
evaluation boards can be powered by a standard configurable
bench power supply within a 3.0 V to 5.5 V range.
The EVAL-ADM3066EEBZ evaluation board has a footprint for
the ADM3066EBRMZ half-duplex RS-485 transceiver in a 10-lead
MSOP package. The EVAL-ADM3066EEB1Z evaluation board
has a footprint for a half-duplex RS-485 transceiver in a 10-lead
LFCSP package.
Complete specifications for the ADM3066E are provided in the
ADM3066E data sheet and must be consulted in conjunction with
this user guide when using the evaluation board.
EVALUATION BOARD PHOTOGRAPHS
15761-001
Figure 1. EVAL-ADM3066EEBZ Evaluation Board
15761-002
Figure 2. EVAL-ADM3066EEB1Z Evaluation Board
UG-1131 EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z User Guide
Rev. 0 | Page 2 of 9
TABLE OF CONTENTS
Features .............................................................................................. 1
Evaluation Kit Contents ................................................................... 1
Additional Equipment Needed ....................................................... 1
General Description ......................................................................... 1
Evaluation Board Photographs ....................................................... 1
Revision History ............................................................................... 2
Evaluation Board Hardware ............................................................ 3
Setting Up the Evaluation Board ................................................ 3
Input and Output Connections .................................................. 3
Other Board Components............................................................3
Half-Duplex RS-485 Transceivers Point to Point Test..............4
IEC 61000-4-2 ESD Protection to ±12 kV (Contact) and
±12 kV (Air Gap) ..........................................................................4
Evaluation Board Schematics and Artwork ...................................5
Ordering Information .......................................................................8
Bill of Materials ..............................................................................8
Related Links ..................................................................................9
REVISION HISTORY
5/2017—Revision 0: Initial Version
EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z User Guide UG-1131
Rev. 0 | Page 3 of 9
EVALUATION BOARD HARDWARE
SETTING UP THE EVALUATION BOARD
The E VA L -ADM3066EEBZ and E VA L-ADM3066EEB1Z
evaluation boards are powered by connecting a 3.0 V or 5.5 V
power supply to the J1 screw terminals for VCC and GND at the
top of the evaluation board. A 10 µF decoupling capacitor, C3, is
fitted at the connector between VCC and GND. The VCC pin of
the RS-485 transceiver is fitted with a 100 nF decoupling
capacitor, C1, with a second footprint for an optional additional
capacitor, C2. VIO can be connected with VCC or a separate 1.8 V
power supply.
Corresponding labeled test points allow monitoring of the
power supply to the evaluation board and the probe reference to
ground.
INPUT AND OUTPUT CONNECTIONS
Digital input and output signals are connected via the J3 screw
terminal block, allowing wire connections from the evaluation
boards to a signal generator or UART. The EVA L -ADM3066EEBZ
and E VA L -ADM3066EEB1Z include connections for data input
(DI), receiver output (RO), receiver enable (RE), and driver
enable (DE). Alternatively, jumper connections can drive these
inputs and/or connect them to VCC and GND (see Table 1). The
E VA L-ADM3066EEBZ and E VA L -ADM3066EEB1Z evaluation
boards also have an SMA right angle jack (DI), which is the
preferred option for delivering a high speed 50 Mbps signal to
the evaluation boards.
Connections to an RS-485 bus are made via a screw terminal block,
J5. For the E VA L -ADM3066EEBZ or E VA L-ADM3066EEB1Z
half-duplex boards, there are two bus input/output signals, A
and B, for noninverting and inverting signals, respectively. The
bus cable can also include a common ground connection or
shield and can also be connected to the J5 screw terminal block
of the evaluation boards. Test points are available on the
evaluation boards and are appropriately labeled for all digital
and bus input/output signals.
OTHER BOARD COMPONENTS
The E VA L -ADM3066EEBZ and E VA L -ADM3066EEB1Z
evaluation boards include footprints for termination resistors,
RT1 and RT2, as well as pull-up and pull-down resistors, R1 and
R2. Termination resistors of 120 Ω are fitted to the evaluation
board; these resistors can be removed or replaced with a
different value resistor as needed. Inserting both LK3 and LK4
adds a 60 Ω load to the RS-485 driver.
Biasing Resistors for Bus Idle Fail-Safe
Although the ADM3066E has a built-in receiver fail-safe for the
bus idle condition, there are footprints on the evaluation boards
for fitting the R2 pull-up resistor to VCC on A, as well as the R1
pull-down resistor to GND on B. These resistors can be fitted if
the user is connecting to other devices that require such external
biasing resistors on the bus. The exact value required for a
200 mV minimum differential voltage in the bus idle condition
depends on the supply voltage (for example, 960 Ω for 3.3 V
and 1440 Ω for 5 V).
For more information about the bus idle fail-safe, see the
AN-960 Application Note, RS-485/RS-422 Circuit
Implementation Guide.
Table 1. Jumper Configurations
Link Connection Description
LK1 A Connects the receiver enable (RE) input of the ADM3066E to VCC. This setting disables the receiver.
B Connects the RE input of the ADM3066E to GND. This setting enables the receiver.
C Connects the RE input of the ADM3066E to the J3-2 terminal block connector.
D
Connects the
RE
input of the ADM3066E to the J3-3 terminal block connector; that is, the input for both
RE
and DE
is set by LK1. This setting ensures that when the driver is enabled, the receiver is disabled, or when the driver is
disabled, the receiver is enabled.
LK2
A
Connects the DE input of the ADM3066E to V
CC
. This setting enables the driver.
B Connects the DE input of the ADM3066E to GND. This setting disables the driver.
C Connects the DE input of the ADM3066E to the J3-2 terminal block connector.
LK3 Inserted Connects the 120 Ω RT1 termination resistor across the RS-485 A and B pins.
Not inserted Disconnects the 120 Ω RT1 termination resistor across the RS-485 A and B pins.
LK4 Inserted Connects the 120 Ω RT2 termination resistor across the RS-485 A and B pins.
Not inserted
Disconnects the 120 Ω RT2 termination resistor across the RS-485 A and B pins.
LK6 Inserted Connects VCC with VIO.
Not inserted
Disconnects V
CC
with V
IO.
UG-1131 EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z User Guide
Rev. 0 | Page 4 of 9
HALF-DUPLEX RS-485 TRANSCEIVERS POINT TO
POINT TEST
A point to point test can be set up with either two EVAL-
ADM3066EEBZ evaluation boards or two EVAL-ADM3066EEB1Z
evaluation boards. Figure 4 shows two half-duplex evaluation
boards in this configuration. Note the positions of LK1 and LK2 on
each evaluation board that enable the driver on one evaluation
board and the receiver on the other evaluation board. Remove
LK4 from the EVAL-ADM3066EEBZ or EVAL-ADM3066EEB1Z
evaluation board to ensure both ends of the bus have only a 120 Ω
load. Differential signals on the bus are monitored with an
oscilloscope, as well as the DI pin and RO pin of the ADM3066E
IEC 61000-4-2 ESD PROTECTION TO ±12 kV
(CONTACT) AND ±12 kV (AIR GAP)
The EVAL-ADM3066EEBZ and EVAL-ADM3066EEB1Z
evaluation boards are tested to achieve protection against
IEC 61000-4-2 ESD to ±12 kV (contact), and ±12 kV (air gap)
on the RS-485 A and B bus pins.
IEC 61000-4-2 ESD standard describes testing using two
coupling methods known as contact discharge and air gap
discharge. Contact discharge implies a direct contact between
the discharge gun and the equipment under test (EUT).
During air discharge testing, the charged electrode of the
discharge gun is moved toward the EUT until a discharge
occurs as an arc across the air gap. The discharge gun does not
make direct contact with the EUT.
During testing, the EVAL-ADM3066EEBZ and EVAL-
ADM3066EEB1Z A and B pins are subjected to at least 10 positive
and 10 negative single discharges with a 1 sec interval between
each pulse. The highest specified IEC 61000-4-2 ESD test is
Level 4, which defines a contact discharge voltage of ±8 kV and
an air discharge voltage of ±15 kV.
Figure 3 shows the 8 kV contact discharge current waveform as
described in the ADM3066E data sheet. Some key IEC 61000-4-2
waveform parameters are rise times of less than 1 ns and pulse
widths of approximately 60 ns.
15761-003
I
PEAK
30A
30ns 60ns
16AI
30ns
I
60ns
8A
10%
tR
= 0.7n s TO 1ns
t
90%
Figure 3. IEC 61000-4-2 ESD Waveform (8 kV)
OSCILLOSCOPE
A
LK2
LK1
B
C
D
A
B
C
RO
RE
DE
DI
B
A
RO
RE
DE
DI
B
A
VIO
J1
J3 VCC
A
LK2
LK1
B
C
D
A
B
CGND
RO
RE
DE
DI
B
A
GND
GND
GND
RO
RE
DE
DI
LK4
LK3
LK4
LK3
B
A
VIO
J1
J5
J5
J3 VCC
EVAL-ADM3066EEBZ
EVAL-ADM3066EEBZ
3.3V OR 5V
SUPPLY
3.3V OR 5V
SUPPLY
SIGNAL
GENERATOR
DI
DI
LK6
LK6
15761-004
Figure 4. Half-Duplex RS-485 Two Board Point to Point Test
EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z User Guide UG-1131
Rev. 0 | Page 7 of 9
15761-007
Figure 7. EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z Silkscreen
15761-008
Figure 8. EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z Component Side/Layer 1
15761-009
Figure 9. EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z Layer 2
15761-010
Figure 10. EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z Layer 3
15761-011
Figure 11. EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z Layer 4
UG-1131 EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z User Guide
Rev. 0 | Page 8 of 9
ORDERING INFORMATION
BILL OF MATERIALS
Table 2. EVAL-ADM3066EEBZ
Qty Reference Designator Description Supplier Part Number
2 C1, C6 Capacitor, 100 nF, 0805 Multicomp MCCA000274
3 C2, C4, C5 Capacitor, not placed/optional Not applicable Not applicable
2 C3, C7 Capacitor, 10 µF, Case B Kemet B45196H3106K209
8 A, B, DI, RO, A_GND, B_GND,
DI_GND, RO_GND
High speed test point, silver pin Not applicable 040/30P/LA/KP2 SILVER
2 DE, RE Test point, yellow Vero Technologies 20-313140
1 GND Test point, black Vero Technologies 20-2137
1 DI_ SMA right angle jack Not applicable 5-1814400-1
1 J1 Two-way terminal block Lumberg KRM 02
2 J3, J5 Four-way terminal block Lumberg KRM 04
1 LK1 8-pin (4 × 2), 0.1" header and shorting
block
Harwin M20-9953646 and M7566-05
1 LK2 6-pin (3 × 2), 0.1" header and shorting
block
Harwin M20-9953646 and M7566-05
3 LK3, LK4, LK6 Jumper block, 2-pin, 0.1" spacing Harwin M20-9990246 and M7566-05
2 R1, R2 Resistor, not placed/optional Not applicable
1 R3 Resistor, 0 Ω, 0805 Vishay Draloric CRCW08050000Z0EA
2 RT1, RT2 Resistor, 120 Ω, 0805 Multicomp MC 0.1W 0805 1% 120R
1 U1 10-lead MSOP Analog Devices, Inc. ADM3066EBRMZ
2 VCC, VIO Test point, red Vero Technologies 20-313137
Table 3. EVAL-ADM3066EEB1Z
Qty Reference Designator Description Supplier Part Number
2 C1, C6 Capacitor, 100 nF, 0805 Multicomp MCCA000274
3 C2, C4, C5 Capacitor, not placed/optional Not applicable Not applicable
2 C3, C7 Capacitor, 10 µF, Case B Kemet B45196H3106K209
8 A, B, DI, RO, A_GND,
B_GND, DI_GND, RO_GND
High speed test point, silver pin Not applicable 040/30P/LA/KP2 SILVER
2 DE, RE Test point, yellow Vero Technologies 20-313140
1 GND Test point, black Vero Technologies 20-2137
1 DI_ SMA right angle jack Not applicable 5-1814400-1
1 J1 Two-way terminal block Lumberg KRM 02
2 J3, J5 Four-way terminal block Lumberg KRM 04
1 LK1 8-pin (4 × 2), 0.1" header and
shorting block
Harwin M20-9953646 and M7566-05
1 LK2 6-pin (3 × 2), 0.1" header and
shorting block
Harwin M20-9953646 and M7566-05
3 LK3, LK4, LK6 Jumper block, 2-pin, 0.1" spacing Harwin M20-9990246 and M7566-05
2 R1, R2 Resistor, not placed/optional Not applicable
1 R3 Resistor, 0 Ω, 0805 Vishay Draloric CRCW08050000Z0EA
2 RT1, RT2 Resistor, 120 Ω, 0805 Multicomp MC 0.1W 0805 1% 120R
1 U1 10-lead LFCSP Analog Devices, Inc. ADM3066EBCPZ
2 VCC, VIO Test point, red Vero Technologies 20-313137
EVAL-ADM3066EEBZ/EVAL-ADM3066EEB1Z User Guide UG-1131
Rev. 0 | Page 9 of 9
RELATED LINKS
Resource
Description
ADM3066E 3.0 V to 5.5 V, ±12 kV IEC ESD Protected, 50 Mbps RS-485 Transceiver
AN-960 RS-485/RS-422 Circuit Implementation Guide
Interface RS-485 and RS-422 RS-485/RS-422 Product Selection
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions
set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you
have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc.
(“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal,
temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided
for the sole and exclusive purpose referenced above, and agrees not to use the Evaluat
ion Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional
limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term
“Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including
ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be
considered the confidential and proprietary information of ADI. Customer may
not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to
promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any
occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board.
Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice
to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO
WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED
TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL
PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF
THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE
AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable
United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of
Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby
submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.
©2017 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
UG15761-5/17(0)
