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6221/2182A Keithley Meter


The 6221/2182A is a new meter from Keithley. A meter is an instrument used to test and measure alternating current (AC) or direct current (DC) voltage, resistance, RF, electric current, and much more.

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Additional Features:

  • Source and sink (programmable load) 100fA to 100mA
  • 1014W 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
  • Source AC currents from 4pA to 210mA peak to peak for AC characterization of components and materials.
  • The 6221’s 10 MHz output update rate generates smooth sine waves up to 100 kHz
  • Built-in standard and arbitrary waveform generators with 1 mHz to 100 kHz frequency range.
  • Applications include use as a complex programmable load or sensor signal and for noise emulation
  • Programmable pulse widths as short as 5μs, limiting power dissipation in delicate components
  • Supports pulsed I-V measurements down to 50μs when used with Model 2182A Nanovoltmeter
  • Built-in Ethernet interface for easy remote control without a GPIB controller card


  • 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

The Keithley 6221/2182A 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 Keithley 6221 ideal for applications like Hall measurements, resistance measurements using delta mode, pulsed measurements, and differential conductance measurements.

The need for precision, low current sourcing. Device testing and characterization for today’s very small and power-efficient electronics requires sourcing low current levels, which demands the use of a precision, low current source. Lower stimulus currents produce lower—and harder to measure—voltages across the device. Combining the Model 6221 with a Model 2182A Nanovoltmeter makes it possible to address both of these challenges.

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