Keithley 6221 - DC and AC Current Source

The Keithley 6221 is a high-precision DC and AC current source designed for applications requiring low noise and high accuracy.

Main Specifications

• Output Current Range: from 100 femtoamperes (fA) to 100 milliamperes (mA) with a resolution of 100 fA in the lowest DC range.
• Current Setting Accuracy: ±(0.05% of the setting + 100 pA), ensuring high accuracy at low current levels.
• Output Resistance: 10¹⁴ ohms, ensuring stable current delivery to varying loads.
• AC Frequency Range: from 1 mHz to 100 kHz with frequency accuracy of ±100 ppm.
• Built-in Signal Generators: standard and arbitrary waveforms with a frequency range from 1 mHz to 100 kHz.
• Programmable Pulses: minimum pulse duration of 5 microseconds (μs).
• Connectivity Interfaces: RS-232, GPIB, and Ethernet for remote control.
  
  

Applications

The Keithley 6221 is ideal for testing and measurements in nanotechnology, optoelectronics, and superconductors. It provides precise current sourcing and measurement capabilities critical for research and development in these fields.

Features

• Low Noise: minimal noise level of 80 fA RMS for accurate measurements without significant interference.
• Compatibility with Model 2182A Nanovoltmeter: synchronized pulsed measurements with pulse durations down to 50 μs, useful for differential conductance and resistance measurements.
  
  

With its combination of high precision, wide output current range, and built-in signal generation capabilities, the Keithley 6221 is a versatile tool for research and production tasks requiring accurate current sourcing and measurement.