User manual | Customer Collaboration with Failure Analysis Requests

AN-1280
APPLICATION NOTE
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
Customer Collaboration with Failure Analysis Requests
by the Worldwide Product Analysis Group
INTRODUCTION
Analog Devices, Inc., provides failure analysis as a service for
products purchased directly from Analog Devices or directly from
authorized distributors. A successful failure analysis begins with
an understanding of the events that led up to product failure and
concludes with the identification of the failure mechanism, root
cause, and corrective action.
This application note provides guidance to customers to
facilitate a successful failure analysis process. Additional
information on returning parts for failure analysis is available on
the Analog.com web site under Quality Systems.
The following details should also be provided:
1.
2.
3.
4.
5.
6.
Type of problem (electrical, mechanical, and so on)
Whether Customs personnel opened the shipping box
Type of failure (repeatable or intermittent)
Point of failure (incoming, field, qualification, and so on)
Reported failure rate
Method of failure verification
ESD CONTROLS
Devices must be suitably packaged so that they are protected
during shipment. Charged devices and circuit boards can
discharge without detection. Although Analog Devices
products feature patented or proprietary protection circuitry,
damage may occur on devices subjected to high energy ESD.
Therefore, proper ESD precautions need to be taken to avoid
performance degradation or loss of functionality.
APPLICATION DESCRIPTION
Schematics illustrating the Analog Devices component and
surrounding circuitry should be provided when returning
components for failure analysis. This includes tolerances of
supply voltages, bias voltages, and so on, as well as model
numbers for any overvoltage protection devices.
ANSI/ESD S20.20 defines the requirements for establishing,
implementing, and maintaining an ESD control program to
protect electronic parts, assemblies, and equipment. This
document can be downloaded from the Electrostatic Discharge
Association website.
If possible, return only the Analog Devices component.
However, if the device is still mounted on a customer
board/module, instructions on how to power up the module
should be provided along with the complete layout and
schematics. Any specific instructions regarding software or
other equipment needed to run the module must also be
provided.
DEMOUNTING
FAILURE DESCRIPTION
A thorough description of the failure is essential in diagnosing
potential failure mechanisms. Failure descriptions, such as
part defective, are not very helpful. Application-specific fault
descriptions are also not very helpful. Failing parameters based
on the specific Analog Devices data sheet should be provided.
A description of the events leading up to the failure (use
conditions, voltages, temperature, and so on), in addition to
anomalous electrical behavior of the component measured from
its pins, can help expedite the failure analysis process.
Historical background information, such as the frequency of
a given failure, the last time the failure was observed, and so
on, is also requested. It is important to note and communicate
the presence of any additional failing components within the
system.
Care must be taken to preserve the integrity of the package
and the leads. When removing mounted components from
application boards and/or reballing components, customers
must employ moisture controls similar to those used for storing
and mounting parts, such as those specified in JEDEC Standard
J-STD-020. This standard is available for download from the
JEDEC website.
ABA SWAP
ABA swap is the recommended method to confirm a failing
component. The suspected failing component should be
removed from the customer’s failing board/system and replaced
with a known good component. If the system continues to fail,
then further system-level isolation is required. If the system
passes with the known good component, then the original
failing component should be inserted in a known good board to
confirm the failure of the suspected component. The known
good board should have a socket for the suspected component
to prevent potential further damage of this component.
Rev. 0 | Page 1 of 2
AN-1280
Application Note
PART INFORMATION
When returning devices, it is critical to provide information
regarding the lineage of the device.
The following information needs to be provided for each part
returned. Some examples are provided in parentheses.
1.
2.
3.
4.
5.
6.
Specific purchase source (such as distributor name)
Full Analog Devices model number (AD8376ACPZ)
REVISION HISTORY
12/13—Revision 0: Initial Version
©2013 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
AN11992-0-12/13(0)
Rev. 0 | Page 2 of 2
Date code (1320)
Lot number (86067)
Purchase order number
Customer part number

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