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In this section:

Analog-to-digital converter ....................................................... 4-1

Source-measure concepts ....................................................... 4-1

Measurement settling time considerations ............................. 4-25

Effects of load on current source settling time........................ 4-26

Creating pulses with the Series 2600B .................................. 4-27

Analog-to-digital converter

The Series 2600B SMUs have an integrating analog-to-digital converter (ADC). The integrating ADC

uses a ratiometric analog-to-digital conversion technique. Depending on the configuration of the

integrating ADC, periodic fresh reference measurements are required to minimize drift. The

measurement aperture is used to determine the time interval between these measurement updates.

For additional information, see Autozero (on page 2-31

). To help optimize operation of this ADC, the

instrument caches the reference and zero values for up to ten of the most recent number of power

line cycles. For additional information, see NPLC caching (on page

2-32).

Source-measure concepts

Overview

This section provides detailed information about source-measure concepts, including:

• Compliance limit principles (on page 4-2)

• Overheating protection (on page 4-2)

• Operating boundaries (on page 4-4)

• Basic circuit configurations (on page 4-19)

• Guard (on page 4-23)

Section 4

Theory of operation

Keithley 2614B Reference Manual

Other manuals for Keithley 2614B