6220-6221
5Pages

Catalog excerpts

DC Current Source AC and DC Current Source The Model 6220 DC Current Source and 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 . 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 6220 or 6221 with a Model 2182A Nanovoltmeter makes it possible to address both of these challenges AC current source and current source waveform generator. The Model 6221 is the only low current AC source on the market . Before its introduction, researchers and engineers were forced to build their own AC current sources This cost-effective source provides better accuracy, consistency, reliability, and robustness than “home-made” solutions . The Model 6221 is also the only commercially available current source waveform generator, which greatly simplifies creating and outputting complex waveforms Simple programming. Both current sources are fully programmable via the front panel controls or from an external controller via RS-232 or GPIB interfaces; the Model 6221 also features an Ethernet interface for remote control from anywhere there's an Ethernet connection . Both instruments can source DC currents from 100fA to 105mA; the Model 6221 can also source AC currents from 4pA to 210mA peak to peak. The output voltage compliance of either source can be set from 0 . 1V to 105V in 10mV steps . Voltage compliance (which limits the amount of voltage applied when sourcing a current) is critical for applications in which overvoltages could damage the device under test (DUT) . Drop-in replacement for the Model 220 current source. These instruments build upon Keithley's popular Model 220 Programmable Current Source; a Model 220 emulation mode makes it easy to replace a Model 220 with a Model 6220/6221 in an existing application without rewriting the control code Define and execute current ramps easily. Both the Models 6220 and 6221 offer tools for defining current ramps and stepping through predefined sequences of up to 65,536 output values using a trigger or a timer Both sources support linear, logarithmic, and custom sweeps 6220 and 6221 • 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 6221 only • source Ac currents from 4pA to 210mA peak to peak for Ac characterization of components and materials. The 6221's 10MHz output update rate generates smooth sine waves up to 100kHz • built-in standard and arbitrary waveform generators with 1mHz to 100kHz frequency range. Applications include use as a complex programmable load or sensor signal and for noise emulation • Programmable pulse widths as short as 5ps, limiting power dissipation in delicate components. Supports pulsed I-V measurements down to 50ps when used with Model 2182A Nanovoltmeter • Built-in Ethernet interface for easy remote control without a GPIB controller card 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 LOW LEVEL MEASURE & SOURCE Precision low current sourcing A Greater Measure of Confidence

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Precision low current sourcing Ordering Information 6220 DC Precision Current Source 6221 AC and DC Current Source 6220/2182A Complete Delta Mode System, w/DC Current Source, Nanovoltmeter, and all necessary cables (GPIB cables not included) 6221/2182A Complete Delta Mode System, w/AC and DC Current Source, Nano olt v meter, and all necessary cables (GPIB cables not included) Accessories Supplied 237-ALG-2 6.6 ft (2m), Low Noise, Input Cable with Triaxto-Alligator Clips 8501-2 6.6 ft (2m) Trigger Link Cable to connect 622x to 2182A CA-180-3A Ethernet Crossover Cable (6221 only) CA-351...

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DC Current Source AC and DC Current Source > 7VTf-c Delta Mode Resist. u*ce Graph 06 -0 2006+0 Delta Mode Resistance Graph Delta Mode Measurement Figure 2. Delta mode offers 1000-to-1 noise reduction. The delta mode enables measuring low voltages and resistances accurately. Once the Model 622X and the Model 2182A are connected properly, the user simply presses the current source's Delta button, followed by the Trigger button, which starts the test . The Model 622X and the Model 2182A work together seamlessly and can be controlled via the GPIB interface (GPIB or Ethernet with the Model 6221)...

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DC Current Source AC and DC Current Source Precision low current sourcing The Model 6221 can also expand the capabilities of lock-in amplifiers in applications that already employ them. For example, its clean signals and its output synchronization signal make it an ideal output source for lock-in applications such as measuring second and third harmonic device response. Model 2182A Nanovoltmeter The Model 2182A expands upon the capabilities of Keithley’s original Model 2182 Nano olt v meter. Although the Model 6220 and 6221 are compatible with the Model 2182, delta mode and differential...

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