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-2635_2636 Rev. A / September 2007
Page 1 of 8
1. SPECIFICATION CONDITIONS
This document contains specifications and supplemental information for the Models 2635 and 2636 System
SourceMeters
®
. Specifications are the standards against which the Models 2635 and 2636 are tested. Upon
leaving the factory the 2635 and 2636 meet these specifications. Supplemental and typical values are non-
warranted, apply at 23°C, and are provided solely as useful information.
The source and measurement accuracies are specified at the SourceMeters
®
CHANNEL A (2635 and 2636) or
SourceMeters
®
B (2636) terminals under the following conditions:
1. 23°C ± 5°C, < 70% relative humidity.
2. After two-hour warm-up.
3. Speed normal (1 NPLC).
4. A/D auto-zero enabled.
5. Remote sense operation or properly zeroed local operation.
6. Calibration period: one year.
2. SOURCE SPECIFICATIONS
VOLTAGE SOURCE SPECIFICATIONS
Specifications Category
Specifications
RANGE PROGRAMMING
RESOLUTION
ACCURACY (1 Year)
23°C ± 5°C
± (% rdg. + volts)
TYPICAL NOISE
(peak-peak)
0.1 Hz–10 Hz
200.000 mV
5 µV
0.02% + 375 µV
20 µV
2.00000 V
50 µV
0.02% + 600 µV
50 µV
20.0000 V
500 µV
0.02% + 5 mV
300 µV
Voltage Programming
Accuracy
1
200.000 V
5 mV
0.02% + 50 mV
2 mV
Temperature
Coefficient
± (0.15 × accuracy specification)/°C
• For temperatures (0°–18°C & 28°–50°C)
Maximum Output
Power and Source/Sink
Limits
2
30.3 W per channel maximum.
• ± 20.2 V @ ± 1.5 A
• ± 202 V @ ± 100 mA
• Four-quadrant source or sink operation.
Voltage Regulation
Line: 0.01% of range
Load: ± (0.01% of range + 100 µV).
Noise
10 Hz – 20 MHz
< 20 mV peak-peak (typical), < 3 mV RMS (typical)
• 20 V range
Current
Limit/Compliance
3
Bipolar current limit (compliance) set with single value. Minimum
value is 100 pA. Accuracy is the same as current source.
1
Add 50 µV to source accuracy specifications per volt of HI lead drop.
2
Full power source operation regardless of load to 30°C ambient. Above 30°C and/or power sink operation, refer to Section 8 – “Operating
Boundaries” in the Series 2600 Reference Manual for additional power derating information.
