Sweep Operation 9-19
Staircase sweep programming example
As an example of linear staircase sweep operation, assume the SourceMeter is to be used to
generate the I-V characteristics of a diode. Many diode tests, such as breakdown voltage and
leakage current, require only single-point measurements. Some, such as quality-assurance
analysis of marginal parts, involve performing a complete I-V sweep for detailed analysis.
For the purposes of this test, assume the following basic sweep parameters:
Source Function: current
Sense Function: volts
Source Mode: sweep
Start Current: 1mA
Stop Current: 10mA
Step Current: 1mA
Voltage Compliance: 1V
Source Delay: 100ms
Figure 9-8 shows typical test connections for this test, and Figure 9-9 shows a typical diode
curve. Note that the diode anode is connected to HI, and the cathode is connected to LO. These
connections are required to properly forward bias the diode for the purposes of the test. The test
connections could also be reversed by using negative sweep voltage parameters.
Triax Cable
Optional Noise Shield
HI
LO
KEITHLEY
6430
REMOTE
PreAmp
SENSE
MAINFRAME
Connect to REMOTE
PreAmp connector on rear
panel of mainframe
Preamp Cable
IN/OUT
HIGH
Figure 9-8
Connections for
diode I-V tests
I
leakage
V
forward
I
V
-I
-V
V
reverse
Figure 9-9
Diode I-V curve
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