Section 2: Connections and configuration
Model 4200A-SCS Parameter Analyzer Reference Manual
2-16
4200A-901-01 Rev. C / February 2017
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.
•
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 will sense 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 being used.
•
The center pin is FORCE
•
The inner shield is GUARD
•
The outer shield is circuit COMMON
PA CNTRL connector
The PA CNTRL (preamp control) terminal is a 15-pin D-sub connector that provides both power and
signal connections to the 4200-PA remote preamp. The preamp 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.
Basic SMU and preamplifier circuit configuration
Basic SMU and preamp circuit configuration is shown in the next figure. This configuration is similar
to the SMU configuration discussed earlier, and the preamp, which adds low-current source-measure
capabilities.
The preamp FORCE terminal is connected to DUT HI, while DUT LO is connected to GROUND.
