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A Greater Measure of Confidence

The Model 6430 Sub-Femtoamp Remote

SourceMeter SMU Instrument combines the

voltage and current sourcing and measurement

functions of Keithley’s popular SourceMeter

SMU instruments with sensitivity, noise, and

input resistance specifications superior to

electrometers. This unique combination of broad

functionality and exceptional measurement

integrity is made possible by the Model 6430’s

Remote PreAmp, which offers a very sensitive

bi-directional amplifier with sensitive feedback

elements for measuring or sourcing currents at

the device being tested. The high level signals

output by the Remote PreAmp are sent to the

controlling mainframe via a two-meter cable.

This allows the user to make a direct or very

short connection to the signal, minimizing the

effects of cable noise.

The Model 6430 makes voltage, current, and

resistance measurements at speeds no electrom-

eter can match. It can read up to 2000 source/

measure readings per second into internal memory. Currents can be measured in as little as 5ms on

the 100nA range, decreasing to just a few hundred microseconds on the higher ranges.

The Model 6430’s distinguishing features include its excellent low current sensitivity and the Remote

PreAmp, which makes this sensitivity useful by eliminating long input cables. The Remote PreAmp

is an integral part of the Model 6430’s feedback measuring system that cannot be operated indepen-

dently from the measurement mainframe, although it can be separated from the mainframe by up to

two meters of connection cable carrying high level signals.

applications

The Model 6430’s capabilities make it equally

useful for research work and for evaluating

sophisticated components in test labs for low-

current, high-resistance, or sensitive semicon-

ductor measurements. The low noise and drift

performance of the Model 6430 also makes it

well suited for research studies in single electron

devices, highly resistive nanowires and nano-

tubes, polymers, highly resistive nanomaterials,

and electrochemical amperometry applications.

High speed Data Handling

The Model 6430 can read more than 2000 read-

ings per second into its internal memory buffer.

The IEEE-488 bus output can transmit up to

75 source/measure readings per second to an

external computer controller, including pass/fail

indication.

• 0.4fa p-p (4E–16a) noise

(typical)

• remote Preamp can be located

at the signal source to minimize

cable noise

• >1016

W input resistance on

voltage measurements

• High speed — up to 2000

readings/second

• up to 6½-digit resolution

• fast characterization

of components with

programmable digital I/o and

interfaces

+100mA

–100mA

+10mA

+20V

–20V

+200V

–200V

–10mA

The Model 6430 provides four-quadrant

sourcing of up to 2.2W, as well as measure-

ment sensitivity down to sub-femtoamp and

microvolt levels. It can measure currents

from the 1pa range (with just 0.4fa p-p noise

typical) up to the 100ma range at up to 20V.

Voltage ranges from 200mV to 200V are

available. Current and voltage range settings

define the maximum source or sink voltage

or current.

6430

Sub-femtoamp Remote

SourceMeter® SMU Instrument