A device under test (DUT), also known as equipment under test (EUT) and unit under test (UUT), is a manufactured product undergoing testing, either at first manufacture or later during its life cycle as part of ongoing functional testing and calibration checks. This can include a test after repair to establish that the product is performing in accordance with the original product specification.
Electronics testing
In the
electronics industry
The electronics industry is the industry (economics), industry that produces electronic devices. It emerged in the 20th century and is today one of the largest global industries. Contemporary society uses a vast array of electronic devices that ar ...
a DUT is any electronic assembly under test.
For example, cell phones coming off of an assembly line may be given a final test in the same way as the individual chips were earlier tested. Each cell phone under test is, briefly, the DUT.
For
circuit boards, the DUT is often connected to the test equipment using a
bed of nails tester of
pogo pins.
Semiconductor testing
In semiconductor testing, the device under test is a
die on a
wafer or the resulting
packaged part. A connection system is used, connecting the part to
automatic
Automatic may refer to:
Music Bands
* Automatic (Australian band), Australian rock band
* Automatic (American band), American rock band
* The Automatic, a Welsh alternative rock band
Albums
* ''Automatic'' (Jack Bruce album), a 1983 el ...
or
manual test equipment. The test equipment then applies power to the part, supplies stimulus signals, then measures and evaluates the resulting outputs from the device. In this way, the tester determines whether the particular device under test meets the device specifications.
While packaged as a wafer,
automatic test equipment
Automatic test equipment or automated test equipment (ATE) is any apparatus that performs tests on a device, known as the device under test (DUT), equipment under test (EUT) or unit under test (UUT), using automation to quickly perform measure ...
(ATE) can connect to the individual units using a set of microscopic needles. Once the chips are sawn apart and packaged, test equipment can connect to the chips using
ZIF sockets (sometimes called ''contactors'').
See also
*
Automatic test equipment
Automatic test equipment or automated test equipment (ATE) is any apparatus that performs tests on a device, known as the device under test (DUT), equipment under test (EUT) or unit under test (UUT), using automation to quickly perform measure ...
*
DUT board
*
Product testing
File:Consumer Reports - product testing - electric light longevity and brightness testing.tif, Testing electric light longevity and brightness testing
File:Consumer Reports - product testing - television testing laboratory.tif, Television testin ...
*
System under test
*
Test bench
A test bench or testing workbench is an environment used to verify the correctness or soundness of a design or model.
The term has its roots in the testing of electronic devices, where an engineer would sit at a lab bench with tools for measurem ...
*
Test oracle
In software testing, a test oracle (or just oracle) is a provider of information that describes correct output based on the input of a test case. Testing with an oracle involves comparing actual results of the system under test (SUT) with the ex ...
References
Semiconductor device fabrication
Electronic engineering
Hardware testing
Product testing
Automatic test equipment
Environmental testing
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