Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
1-888-KEITHLEY
www.keithley.com
Model 2635/2636
System SourceMeter
®
Specifications
Specifications are subject to change without notice.
SPEC-2636_2636 Rev. A / September 2007 Page 3 of 8
Specifications Category Specifications
Overshoot
< ± 0.1% (typical)
• step size = 10% to 90% of range, resistive load, maximum -
current limit/compliance
• See CURRENT SOURCE OUTPUT SETTLING TIME for
additional test conditions
ADDITIONAL SOURCE SPECIFICATIONS
Specifications Category Specifications
Transient Response
Time
< 70 µs for the output to recover to 0.1% for a 10% to 90% step
change in load.
Time required to reach 0.1% of final value after source level
command is processed on a fixed range.
Range Settling Time
200 mV < 50 µs (typical)
2 V < 50 µs (typical)
20 V < 110 µs (typical)
Voltage Source Output
Settling Time
200 V < 700 µs (typical)
Time required to reach 0.1% of final value after source level
command is processed on a fixed range.
• Values below for Iout × Rload = 2 V unless noted
Current Range Settling Time
1.5 A – 1 A
< 120 µs (typical) (Rload > 6 )
100 mA – 10 mA < 80 µs (typical)
1 mA < 100 µs (typical)
100 µA < 150 µs (typical)
10 µA < 500 µs (typical)
1 µA < 2 ms (typical)
100 nA < 20 ms (typical)
10 nA < 40 ms (typical)
Current Source Output
Settling Time
1 nA < 150 ms (typical)
DC Floating Voltage Output can be floated up to ± 250 VDC
Remote Sense
Operating Range
6
Maximum voltage between HI and SENSE HI = 3 V
Maximum voltage between LO and SENSE LO = 3V
Voltage Output
Headroom
200 V Range
• Maximum output voltage = 202.3 V – total voltage drop across
source leads. (maximum 1 per source lead)
20 V Range
• Maximum output voltage = 23.3 V – total voltage drop across
source leads. (maximum 1 per source lead)
6
Add 50 µV to source accuracy specifications per volt of HI lead drop.
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