The Model 6221 AC and DC Current Source combine ease of use with exceptionally low current noise. Low current sourcing is critical to applications in test environments ranging from R&D to production, especially in the semiconductor, nanotechnology, and superconductor industries. High sourcing accuracy and built-in control functions make the Models 6220 and 6221 ideal for applications like Hall measurements, resistance measurements using delta mode, pulsed measurements, and differential conductance measurements.
 

Key Features and Benefits:
 

• Source and sink (programmable load) 100fA to 100mA
   
• 1014Ω output impedance ensures stable current sourcing into variable loads
   
• 65000-point source memory allows executing comprehensive test current sweeps directly from the current source
   
• Built-in RS-232, GPIB, Trigger Link, and digital I/O interfaces
   
• Reconfigurable triax output simplifies matching the application's guarding requirements
   
• Model 220 emulation mode eliminates need to reprogram existing applications
   
• Instrument control software available for PC controllers
   

Related Applications:
 

• Nanotechnology
   
• Differential conductance
   
• Pulsed sourcing and resistance
   
• Optoelectronics
   
• Pulsed I-V
   
• Replacement for AC resistance bridges (when used with Model 2182A)
   
• >Measuring resistance with low power
   
• Replacement for lock-in amplifiers (when used with Model 2182A)
   
• Measuring resistance with low noise