Series 2600B System SourceMeter® Instrument Reference Manual
Section 4: Theory of operation
2600BS-901-01 Rev. B / May 2013
4-27
There is a maximum DUT impedance for each current source range for which the specified current
settling times are maintained. The following table lists the DUT impedances for each of these current
source ranges. For latest specifications, go to the
(
http://www.keithley.com
). The settling time on a current source range can increase significantly when
measuring DUTs that have an impedance that is higher than the maximum DUT impedance listed
below.
Maximum DUT impedances for specified settling time performance
Range
SMU feedback
impedance
Maximum DUT
impedance
1 nA
1 G
Ω
2 G
Ω
10 nA
120 M
Ω
60 M
Ω
100 nA
40 M
Ω
20 M
Ω
1
µ
A
1.2 M
Ω
600 k
Ω
10
µ
A
400 k
Ω
200 k
Ω
100
µ
A
12 k
Ω
6 k
Ω
1 mA
4 k
Ω
2 k
Ω
10 mA
120
Ω
60
Ω
100 mA
40
Ω
20
Ω
1 A
1
Ω
6
Ω
1.5 A
1
Ω
6
Ω
3 A
0.3
Ω
1.5
Ω
Creating pulses with the Series 2600B
Although the Series 2600B is not a pulse generator, you can create pulses by programming the
Series 2600B to output a DC value and then return to an idle level. For information on how to create
pulses, refer to
Sweep operation
(on page 3-20) and
Using the remote trigger model
(on page 3-34).
Pulse rise and fall times
Although the Series 2600B can create pulses, it is not a pulse generator (pulse rise times are not
programmable).
The pulse rise time is the time it takes a pulse to go from 10% to 90% of the pulse's maximum value.
Pulse fall time is similar but on the pulse's trailing edge. For the Series 2600B, pulse rise and fall
times can vary depending on the following factors:
•
Cable specifications and connection configuration
•
Range and pulse settling
(on page 4-28)
•
Load and operating mode
(on page 4-28)
•
Compliance limit settings (for details, see
Limits
(on page 2-27))
Refer to the Series 2600B specifications for details on source settling times. For latest specifications,
go to the
http://www.keithley.com
).
Summary of Contents for System SourceMeter 2601B
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