Theory Of Operation - Keithley 2600B Reference Manual

In this section:
Analog-to-digital converter ....................................................... 4-1
Source-measure concepts ....................................................... 4-1
Measurement settling time considerations ............................. 4-26
Effects of load on current source settling time ........................ 4-27
Creating pulses with the Series 2600B .................................. 4-28
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
instrument caches the reference and zero values for up to ten of the most recent number of power
line cycles. For additional information, see
Source-measure concepts
Overview
This section provides detailed information about source-measure concepts, including:
•
Compliance limit principles
•
Overheating protection
•
Operating boundaries
•
Basic circuit configurations
•
Guard
Autozero
(on page 4-2)
(on page 4-2)
(on page 4-5)
(on page 4-20)
(on page 4-24)
(on page 2-32). To help optimize operation of this ADC, the
NPLC caching (on page 2-33).
Section 4

Theory of operation