Model 4200A-SCS Source-Measure Unit (SMU) User's Manual
Section 4: Source-measure hardware
4200A-SMU-900-01 Rev. A December 2020
4-5
SENSE terminal
The SENSE terminal is a miniature triaxial connector used to apply the SMU SENSE signal to the
DUT in a remote-sense application when the preamplifier is not used.
•
The center pin is SENSE
•
The inner shield is GUARD
•
The outer shield is circuit COMMON
Nominal internal autosense resistance appears between SENSE and FORCE.
The SENSE terminal does not need to be connected to the DUT for the SMU to operate correctly.
Remote sensing is automatic. If SENSE is connected to the DUT, errors due to voltage drops in the
FORCE path between the SMU and the DUT are eliminated and the SMU senses locally.
FORCE terminal
The FORCE terminal is a miniature triaxial connector used to apply the SMU FORCE signal to the
DUT when a preamplifier is not used.
•
The center pin is FORCE
•
The inner shield is GUARD
•
The outer shield is circuit COMMON
PA CNTRL connector
The PA CNTRL (preamplifier control) terminal is a 15-pin D-sub connector that provides both power
and signal connections to the 4200-PA Remote Preamplifier. The preamplifier can either be mounted
and connected directly to the SMU, or it can be connected to the SMU using a cable (4200-RPC-
X
)
when mounted remotely. Refer to the
Source-measure unit (SMU) with 4200-PA overview
4-5) for more information on the preamplifier.
Source-measure unit (SMU) with 4200-PA overview
The following paragraphs discuss these aspects of the 4200-PA remote preamplifier:
•
Basic circuit configuration
•
Compliance limit
•
Operating boundaries
•
Connectors
•
Preamplifier mounting
