User manual

12-4 Limit Testing 2400 Series SourceMeter
®
User’s Manual
With the grading mode selected, each enable software test (Limit 2, 3, 5-12) is per-
formed until a failure occurs. When a test fails, the FAIL message is displayed and the
testing process for that DUT (or DUT element) is terminated.
With the sorting mode selected, each enabled software test (Limit 2, 3, 5-12) is per-
formed until a test passes. When a test passes, the PASS message is displayed and
the testing process for that DUT is terminated.
Binning
Even though no additional equipment is required to perform limit tests on the DUT, a
component handler can be interfaced to the SourceMeter Digital I/O port to perform
binning operations. After the testing process, the DUT will be placed in an assigned
bin.
NOTE The Model 2401 does not have a handler interface. Therefore it cannot
be used with a component handler to perform binning operations.
For the grading mode, the binning system can be further automated by adding a scan-
ner. With the use of a scanner, the tests can be repeated (cycled) to test individual ele-
ments of a single package (i.e., resistor network). See “Binning systems,” page 12-10,
for more information on using component handlers and scanners to perform binning
operations.
Operation overview
Grading mode
Grading mode limits operation is detailed by the flowchart in Figure 12-2. A test is only
performed if it is enabled. If disabled, operation proceeds to the next test. The follow-
ing assumes the first three limit tests are enabled and the digital output of the
SourceMeter is connected to a component handler for DUT binning. (See “Binning
systems,” page 12-10.) If a handler is not used, ignore digital input/output (handler
interface) actions.
NOTE The Model 2401 does not have a handler interface. Therefore it cannot
be used with a component handler to perform binning operations.
With the limit tests properly configured, turn the SourceMeter output on and press the
LIMIT key. In this example, the testing process will start when the component handler
sends the start-of-test (SOT) strobe pulse to the SourceMeter. Note that if a handler is
not used, testing will start when LIMIT is pressed. Pressing LIMIT a second time termi-
nates the testing process. As shown in the flowchart, limit tests are performed after a
measurement conversion.