The Keithley 220 Programmable Current Source delivers precision current sourcing from 1 nA to 100 mA across selectable ranges, with 1 nA resolution and ±0.05% accuracy plus 10 nA offset. Built for automated test workflows, this instrument combines programmable control via IEEE-488 GPIB with manual front-panel operation, enabling rapid integration into complex measurement systems. Output impedance exceeds 1 GΩ in parallel with less than 100 pF capacitance, ensuring minimal loading effects on low-current devices. Compliance voltage adjusts from 0 V to 10 V. After a 30-minute warm-up, drift remains below 0.01% per hour, supporting characterization tasks demanding exceptional stability and resolution.
Technical Specifications
• Current Output: 1 nA to 100 mA (selectable ranges); 1 nA minimum resolution; ±0.05% of setting + 10 nA accuracy at 25°C
• Stability: 1 GΩ parallel with < 100 pF
• Warm-up Time: 30 minutes for rated accuracy
• Operating Temperature: 0°C to 50°C
• Storage Temperature: -40°C to 75°C
• Humidity: 5% to 85% RH, non-condensing
• Power: 100–240 V AC, 50–400 Hz, 50 VA max
• Dimensions: 212 mm W × 88 mm H × 342 mm D
• Weight: 4.1 kg
– Key Features
• IEEE-488 GPIB interface with SCPI and DDCMP protocol support
• Programmable current values and output on/off control
• Manual control via front-panel rotary knob and dedicated buttons
• Automatic or manual range selection for optimized resolution
• Programmable current sweep capability for I-V curve generation
• Gold-plated binding post output terminals
• Rack-mountable configuration (optional kit)
– Typical Applications
• Semiconductor device characterization (diodes, transistors, resistors)
• Laser diode testing
• Photovoltaic cell testing
• Sensor calibration
• Materials science research
• Low-current component testing
• Automated test equipment integration
– Compatibility & Integration
Compatible with IEEE-488.2 controllers and test automation software supporting SCPI or DDCMP protocols.
