The Keithley 236 Source-Measure Unit (SMU) is a fully programmable instrument that sources and simultaneously measures voltage and current with high precision. It functions as four instruments in one: voltage source, current source, voltage meter, and current meter. This capability makes it ideal for automated test equipment setups requiring leakage current measurement, insulation resistance characterization, and component qualification across wide voltage and current ranges.
Technical Specifications
Sourcing:
• Voltage source: 100 µV to 110 V, <3 ppm accuracy on 11 V and 1.1 V ranges
• Current source: 100 fA to 100 mA, <3 ppm accuracy on specified ranges
• Settling time: <500 µs to 0.01%
• Overshoot: 10¹⁴ Ω with 60 dB at 50/60 Hz (line cycle integration)
• CMRR: >120 dB DC and 50/60 Hz (line cycle integration)
• Voltage burden: <1 mV as ammeter
Performance:
• Source-delay-measure cycle: 1 ms minimum
• Measurement speed: 110 readings/second over IEEE-488
• Measurement rate: 1 ms per point into internal buffer
• Trigger latency: <2 ms
• Load capacitance stability: typical 20,000 pF
– Key Features
• Four-in-one functionality eliminates multiple instruments
• Triaxial connectors for low-noise measurements
• BNC trigger input/output for synchronized operation
• Internal buffer for fast data capture
• Forced-air cooling for continuous operation
– Compatibility & Integration
IEEE-488 interface enables remote programming and control. The instrument operates on 105–125 V AC or 210–250 V AC (switch selectable), consuming 100 VA maximum. Compact footprint: 435 mm W × 448 mm D × 89 mm H, 9 kg. Rated for 0° to 50° C operation with 70% RH maximum humidity (linearly derated above 35° C).
