The Keithley 6221 AC and DC Current Source combines ease of use with exceptionally low current noise, making it ideal for semiconductor, nanotechnology, and superconductor applications. This precision instrument is particularly suitable for calibration of digital voltmeters and analog indicator instruments.

• Source and sink (programmable load) 100fA to 100mA
• 10¹⁴Ω output impedance ensures stable current sourcing into variable loads
• Source AC currents from 2pA to 100mA with 10MHz output update rate
• 65,000-point source memory for comprehensive test current sweeps
• Reconfigurable triax output for matching guarding requirements
• Model 220 emulation mode eliminates need to reprogram existing applications
• Built-in Ethernet interface for easy remote control

When combined with the Model 2182A Nanovoltmeter, the 6221 becomes an ideal solution for Hall measurements, resistance measurements using delta mode, pulsed measurements, differential conductance measurements, and nanotechnology applications where minimal power dissipation is critical.