EVAL-ADuM1241EBZ User Guide
UG-663
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 iCoupler ADuM1240ARSZ/ADuM1241ARSZ/
ADuM1245ARSZ/ADuM1246ARSZ
with the EVAL-ADuM1241EBZ Evaluation System
FEATURES
GENERAL DESCRIPTION
Access to both data channels
Multiple connection options
Support for Tektronix active probes
Provision for cable terminations
Support for PCB edge-mounted coaxial connectors
Easy configuration
Installed iCoupler digital isolator: ADuM1241 in the
20-lead SSOP package
The EVAL-ADuM1241EBZ supports the ADuM1240ARSZ,
ADuM1241ARSZ, ADuM1245ARSZ, and ADuM1246ARSZ,
which are ultralow power, dual-channel iCoupler® isolators. The
evaluation board provides a JEDEC standard 20-lead SSOP pad
layout, support for signal distribution, loopback, and loads
referenced to VDDx or GNDx, as well as optimal bypass capacitance.
Signal sources can be wired onto the board as well as brought
onto the board through edge-mounted SMA connectors (sold
separately) or terminal blocks for power connections. The board
includes 200 mil header positions for compatibility with Tektronix
active probes.
SUPPORTED iCoupler MODELS
ADuM1240ARSZ
ADuM1241ARSZ
ADuM1245ARSZ
ADuM1246ARSZ
The board follows best printed circuit board (PCB) design practices
for 4-layer boards, including a full power and ground plane on
each side of the isolation barrier. No other EMI or noise mitigation
design features are included on this board. In cases of very high
speed operation or when ultralow emissions are required, refer
to the AN-1109 application note for additional board layout
techniques.
12075-001
PHOTOGRAPH OF THE EVALUATION BOARD
Figure 1. EVAL-ADuM1241EBZ Evaluation Board
See the last page for an important warning and disclaimers.
Rev. 0 | Page 1 of 8
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EVAL-ADuM1241EBZ User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1
Connectors .....................................................................................3
Supported iCoupler Models ............................................................ 1
Power Input ....................................................................................3
General Description ......................................................................... 1
Data I/O Structures .......................................................................3
Photograph of the Evaluation Board .............................................. 1
Bypass on the PCB ........................................................................4
Revision History ............................................................................... 2
High Voltage Capability ...............................................................4
Evaluation Board Circuitry ............................................................. 3
Evaluation Board Schematics and Artwork ...................................5
PCB Evaluation Goals .................................................................. 3
Bill of Materials ..................................................................................7
REVISION HISTORY
3/14—Revision 0: Initial Version
Rev. 0 | Page 2 of 8
EVAL-ADuM1241EBZ User Guide
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EVALUATION BOARD CIRCUITRY
PCB EVALUATION GOALS
The EVAL-ADuM1241EBZ board is intended to achieve the
following goals:
•
•
•
•
Evaluate the full range of iCoupler data transfer functions
Power each side of the iCoupler isolator independently
Allow high differential voltage to be applied between the
two sides of the iCoupler isolator
Allow connecting easily to power and instrumentation
Although the evaluation board comes with the ADuM1241ARSZ
iCoupler digital isolator installed, the board is also compatible with
the ADuM1240ARSZ, ADuM1245ARSZ, and ADuM1246ARSZ,
and the user can substitute any of these components in place of the
ADuM1241ARSZ.
CONNECTORS
The PCB provides support for three types of interconnections:
•
•
•
SMA edge-mounted connectors
Through-hole signal ground pairs
Terminal blocks for power connections
With these three options, both temporary and permanent
connections to the board can easily be made.
When coaxial connections are desired, SMA connector positions
are available for the VDD1 and VDD2 power supplies, as well as all
digital inputs and outputs. These SMA connector positions are
left unpopulated so that the user can customize the connectors
for a given application. Figure 2 shows examples of installed SMA
connectors; these connectors were chosen because they are not
only low profile and provide excellent mechanical connections
to the PCB but also support 50 Ω coaxial cabling. Because most
lab equipment is compatible with BNC connectors, adaptors may
be required to use some on-board connectors.
Power can be connected through the P1 and P2 terminal blocks or
can be wired directly to the PCB via the P13 and P14 throughhole connectors. Each through-hole pair provides a power ground
pair with the power on the Pin 1 hole. The pin spacing of each
through-hole connector is 200 mil between centers. This matches
the pin spacing required for Tektronix active scope probes. If a
scope probe connection is desired, the header shown in Figure 2
can be soldered into the through-hole positions, and the signal pin
can be trimmed to match the height requirements of a Tektronix
active scope probe.
POWER INPUT
Each side of the ADuM1240ARSZ/ADuM1241ARSZ/
ADuM1245ARSZ/ADuM1246ARSZ iCoupler isolator requires
an off-board power source. Each power source must be independent if common-mode voltages are to be applied across the
isolation barrier. Sharing a single supply for both sides of the
part across the isolation barrier does not harm the isolator, and
it is useful for functional testing of the ADuM1240ARSZ/
ADuM1241ARSZ/ADuM1245ARSZ/ADuM1246ARSZ iCoupler
isolators when common-mode voltages are not present. If commonmode voltages are to be applied across the isolation barrier,
independent power supplies must be provided for each side of
the isolator.
A ground plane and a power plane are present on Layer 2 and
Layer 3 of the PCB on each side of the isolation barrier. Power
connects to VDD1 for Side 1 and connects to VDD2 for Side 2. The
A and B power pins on each side cannot be powered separately.
DATA I/O STRUCTURES
Each data channel has a variety of structures to help configure,
load, and monitor both the input and output. Figure 3 shows one
of the datapaths from an external connection to the DUT pin.
Each channel has similar connections.
Starting at the external connection, the signal path is
1.
1) SCOPE PROBE
2.
2) SMA CONNECTOR
3.
5) SCOPE PROBE
HEADER
3) TERMINAL
BLOCK
4.
5.
4) SHORTING
JUMPER
Figure 2. Optional Components
12075-002
6) PADS TO
CONNECT SMA
6.
Rev. 0 | Page 3 of 8
A pad layout for a PCB board edge-mounted SMA
connector.
Two 0805 pads are provided where 100 Ω resistors to
ground can be installed. The combined resistance is 50 Ω
to provide a termination for a standard coaxial cable.
A standard 0805 pad layout that allows the coaxial and
termination structures to be connected to the rest of the
signal path.
A 0603 pad layout between the signal path and VDD1 or
VDD2 can be used for installing a pull-up resistor.
A populated 2-pin header provides a signal ground pair
that can be used for clip leads or for shorting a channel to
ground temporarily.
There are groupings of three open through holes, consisting
of a signal and two ground connections. These holes can be
used for hardwiring signal wires into the PCB, installing a
header to accept a Tektronix active probe, or installing a
UG-663
8.
power supply. Parallel bypass capacitors are installed near the
ADuM1241ARSZ and consist of a 0.1 µF capacitor for VDD1 on
the top side and bottom side and a 0.1 µF capacitor for VDD2 on
the bottom side of the board. It is best to use the top side bypass
positions if possible.
2-pin header to allow adjacent channels to temporarily be
shorted together.
A 0805 pad layout between the signal and ground where a
load capacitor or resistor can be installed.
Pads to the adjacent channels are provided to allow permanent
connection of adjacent channels. Inputs can be fanned out
to several channels, or inputs and outputs can be connected
together to allow signals to loopback.
The PCB also implements a distributed capacitive bypass on the
PCB. This consists of power and ground planes closely spaced
on the inner layers of the PCB. This minimizes noise and the
transmission of EMI without using complex design features.
Figure 2 shows many of the optional components installed, as well
as how jumpers can be used to temporarily connect channels.
This figure shows a signal connected to the first channel SMA
and then fanned out to the top three channels and monitored by
an active scope probe.
HIGH VOLTAGE CAPABILITY
This PCB is designed in adherence with 2500 V basic insulation
practices. High voltage testing beyond 2500 V is not recommended.
Appropriate care must be taken when using this evaluation board
at high voltages, and the PCB should not be relied on for safety
functions because it has not been high potential tested (also
known as hipot tested or dielectric withstanding voltage tested)
or certified for safety.
BYPASS ON THE PCB
Several positions and structures are provided to allow optimum
bypass of the evaluation board. Provision has been made for
optional surface-mount bulk capacitors to be installed near
the power connectors to compensate for long cables to the
1 SMA CONNECTOR PADS
6 OPEN HOLES FOR
SOLDERED WIRES OR 200mil
TEKTRONIX HEADER,
GND/GND/SIGNAL
8 CONNECT TO
NEXT CHANNEL UP
2 TERMINATION
2 × 100Ω
8 CONNECT TO
NEXT CHANNEL DOWN
5 2-PIN HEADER
GND/SIGNAL
4 PULL-UP
PAD
7 PULL-DOWN
PAD
3 CONNECT
TO SMA
NOTES
1. THE NUMBERED COMPONENTS IN THIS FIGURE CORRESPOND
TO THE DESCRIPTIONS IN THE DATA I/O STRUCTURES SECTION.
12075-003
7.
EVAL-ADuM1241EBZ User Guide
Figure 3. Configuration and Monitoring Structures (Showing a Datapath from an External Connection to the DUT Pin)
Rev. 0 | Page 4 of 8
EVAL-ADuM1241EBZ User Guide
UG-663
EVALUATION BOARD SCHEMATICS AND ARTWORK
DNI
J13
DNI
1
VDD1
DNI
5432
P13
C3
10UF
1
2
1
VDD2
P15
P16
1
2
P14
1
2
1716020000
1
2
J14
DNI
C8
10UF
5432
1716020000
AGND1
AGND2
DUT1
1
2
3
4
5
6
7
8
9
10
VDD1
VDD1
DNI
DNI
DNI
J3
R31
VIC_1
1
5432
R33
0
0
DNI
DNI
R27
100
R29
100
VIC_2
DNI
C6
15PF
P3A
1
2
3
P3B
1
2
VDD2
GND1
GND2
NC
VDD2
VDD2
NC
DNI
R43
0
R35
0
DNI
GEN_SSOP20
DNI
AGND1
P9A
1
2
P9B
AGND2
J4
DNI
0
DNI
R10
R20
100100
5432
R45
0
1
2
3
P4B
1
2
5432
0
DNI
DNI
R19
100
R21
100
1
2
P10B
C17
15PF
1
2
3
R53
100
R57
100
J10
5432
DNI
R48
EN2_1
DNI
P5B
DNI
DNI
DNI
1
2
3
1
DNI
VDD2
R44
0
P5A
DNI
VOD_2
AGND2
EN1_2
C5
15PF
5432
1
2
3
P11A
1
2
3
P12B
AGND1
C16
15PF
0
DNI
EN2_2
1
DNI
DNI
R52
100
R56
100
J11
5432
AGND2
VDD1
VDD2
VDD1
VDD2
AGND2
AGND1
DNI
C11
0.1UF
ESD GUN TESTING HOLES
DNI
TP1
1502-2
DNI
TP2
1502-2
DNI
TP3
1502-2
DNI
C19
0.1UF
C23
0.1UF
C13
C21
0.1UF0.1UF
C28
0.1UF
DNI
TP4
1502-2
AGND1
AGND2
12075-004
J5
P10A
R25
0
R23
EN1_1
1
1
2
3
AGND2
AGND1
DNI
DNI
0
DNI
P4A
AGND1
DNI
R55
100
DNI
R49
DNI
VDD1
R51
100
VDD2
VOD_1
VID_2
C4
15PF
J9
1
DNI
DNI
R22
VID_1
1
C15
15PF
DNI
VOC_2
DNI
AGND2
AGND1
R24
0
DNI
0
AGND2
R41
0
20 LEAD SSOP CLAMP
1
2
3
DNI
DNI
DNI
R47
VOC_1
DNI
AGND1
VDD1
20
19
18
NC
NC 17
VXC1 VXC2 16
VXD1 VXD2 15
EN1 EN2/NC 14
NC
NC 13
NC
NC 12
GND1 GND2 11
VDD1
AGND2
AGND1
PADSTACKS MODIFIED TO C175D125
Figure 4. EVAL-ADuM1241EBZ Schematic
Rev. 0 | Page 5 of 8
EVAL-ADuM1241EBZ User Guide
12075-005
UG-663
Figure 5. Top Side Layout
Rev. 0 | Page 6 of 8
EVAL-ADuM1241EBZ User Guide
UG-663
BILL OF MATERIALS
Table 1. Bill of Materials
Qty
1
2
2
17
9
Reference Designator
U1
C23, C28
C3, C8
R19 to R21, R22 to R25, R31, R33, R35,
R41, R43 to R45, R47 to R49
C4 to C6, C11, C13, C15, C17, C19, C21
2
6
2
7
8
P15, P16
P3A to P5A, P9A to P11A
P5B, P12B
P3B to P5B, P9B to P12B
J3 to J5, J9 to J11, J13, J14
1
Description
DUT
0.1 µF, 16 V, 10%, 0603
0805 bypass capacitor position
0805 pad for optional, application-specific
connections
0603 pad for optional, application-specific
connections
Terminal block
2-pin header, 200 mil spacing (not installed)
3-pin header 100 mil spacing
2-pin header 100 mil spacing
SMA edge connector (not installed)
DNI = do not install.
Rev. 0 | Page 7 of 8
Part Number 1
Analog Devices, Inc., ADuM1241ARSZ
AVX 0603YC104KAT2A
DNI
DNI
DNI
On-Shore Technology, Inc., OSTTC022162
Samtec MTSW-202-12-G-S-730
FCI, 90726-403HLF
Samtec HTSW-102-07-T-S
Johnson/Emerson Network Power
Connectivity Solutions, Inc., 142-0701-851
UG-663
EVAL-ADuM1241EBZ User Guide
NOTES
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 Evaluation 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
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©2014 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
UG12075-0-3/14(0)
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