2600AS-901-01 Rev. B / September 2008
Return to
5-5
Series 2600A System SourceMeter® Instruments Reference Manual
Section 5: High-Capacitance Mode
Command interface
Turning on High-C mode has the following effects on the SMU settings:
•
smuX.measure.autorangei
is set to
smuX.AUTORANGE_FOLLOW_LIMIT
and cannot
be changed.
•
Current ranges below 1uA are not accessible.
•
If
smuX.source.limiti
is less than 1uA, it is raised to 1uA.
•
If
smuX.source.rangei
is less than 1uA, it is raised to 1uA.
•
If
smuX.source.lowrangei
is less than 1uA, it is raised to 1uA.
•
If
smuX.measure.lowrangei
is less than 1uA, it is raised to 1uA.
Measuring current
The following inputs are required to test leakage using the factory leakage script as shown in the
script example below.
•
SMU:
Indicates the Series 2600A source measure unit to use.
•
levelv:
Setting the voltage level to source.
•
limiti:
Sets the current limit for discharging or charging the capacitor.
•
Sourcedelay:
Solve
to determine the amount of time before taking a current
reading.
Where:
i
is the limiti setting and current limit.
•
measurei:
Sets the current measure range.
•
measuredelay:
Defines the delay after the limit is lowered to measure before the
measurement is taken.
Script example
Use the
attribute to set and control the options for high capacitance mode.
NOTE The Series 2600A must be configured as a voltage source to use the
smuX.source.func
attribute to enable high-capacitance mode.
The following code contains examples that you can use to enable high-capacitance mode on
SMU A:
1.
To enable high-capacitance mode, send the following:
-- Enables high-capacitance mode.
smua.source.highc = smua.ENABLE
2.
Run the
i_leakage_measure()
function
in the
KIHighC
factory script (see
):
-- Charges the capacitor.
smua.source.levelv = 5
smua.source.output = smua.OUTPUT_ON
delay(1)
imeas = i_leakage_measure(smua, 0, 1, 300e-3, 10e-6, 100e-3)
-- The parameters in the i_leakage_measure() function represent
-- the following:
-- smu = smua
-- levelv = 0V
i
C
Δ
v
Δ
t
------
=