Tektronix Keithley 4225-PMU

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Specifications are subject to change without notice.

All Keithley trademarks and trade names are the property of Keithley Instruments.

All other trademarks and trade names are the property of their respective companies.

Keithley Instruments • 28775 Aurora Road • Cleveland, Ohio 44139 • 1-800-833-9200 • tek.com/keithley

04/2022

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Table of Contents6
Introduction10
Models 4220-PGU and 4225-PMU10
Connections12
Introduction12
Connection Guidelines12
PMU Common Connections13
Shield Connections13
Cable Length14
High Frequency Connections14
Prober Chuck Connections15
PGU and PMU Connectors15
Model 4225-RPM16
RPM Input, Output, and Top Panels16
Connecting the RPM to the PMU17
Mounting the RPM19
RPM Diagrams for Local and Remote Sensing19
Using the RPM as a Switch20
Two-Terminal Device Connections21
Three-Terminal Device Connections23
Four-Terminal Device Connections24
Pulse Source-Measure Connections26
Pulse Generator Connections26
Using an Adapter Cable to Connect Pulse Card to DUT27
Connections to Prober or Test Fixture Bulkhead Connectors27
RPM Connections to DUT28
Two-Terminal Test Connections28
Remote Sensing Using RPM Connections to a Prober29
PMU Connection Compensation31
Short Compensation31
Offset Current Compensation32
Perform Connection Compensation32
Enabling Connection Compensation33
Load-Line Effect Compensation (LLEC) for the PMU35
Methods to Compensate for Load-Line Effect36
How LLEC Adjusts Pulse Output to the Target Levels36
Coping with the Load-Line Effect38
LLEC Maintains Even Voltage Spacing38
Test Considerations39
LPT Functions Used to Configure LLEC40
Enable LLEC40
Disable LLEC and Set the Output Impedance41
Setting up Pmus and Pgus in Clarius42
Introduction42
Configure the PGU, PMU, and RPM Using Tests42
Create a PMU Project43
Configure the Tests44
PMU Operation Modes46
PMU - All Terminal Parameters47
Start (PMU Amplitude Sweep)47
Stop (PMU Amplitude Sweep)47
Step (Pulse Amplitude Sweep)48
Points48
Base48
Amplitude48
Dual Sweep (Pulse)49
Force Range (PMU)49
Disable Outputs at Completion49
Current Spot Mean High50
Current Spot Mean Low50
Measure Current Range (PMU)50
Low Range51
Current Sample Waveform51
Voltage Spot Mean High52
Voltage Spot Mean Low52
Voltage Sample Waveform52
Report Timestamps52
Report Status (PMU)53
PMU Measurement Status53
Compensation Short Connection56
Load Line Effect Compensation56
DUT Resistance (R DUT)56
Max Voltage Estimator56
Threshold Current56
Threshold Voltage57
Threshold Power57
PMU Test Settings57
Pulse Settings57
Timing Parameters61
PMU Advanced Test Settings63
PMU Capacitive Charging/Discharging Effects76
PMU and RPM Measure Ranges Are Not Source Ranges78
4220-PGU and 4225-PMU Output Limitations79
Configure the PGU, PMU, and RPM Using Tests79
Step or Sweep Multiple Device Terminals in the same Test80
Basic Troubleshooting Procedure82
Step 1. Verify Prober Connections from the PMU or RPM to the DUT82
Step 2. Verify the Pulse Shape83
Step 3. Is the Pulse Level Correct for each Channel84
Step 4. Is the Pulse I-V Curve Suspect84
Pulse Card Concepts90
Models 4220-PGU and 4225-PMU90
PMU Block Diagram91
Pulse Modes92
Pulse Measurement Types (PMU)92
Measure Modes93
4200A-SCS Power Supply Limitations94
Pulse Source-Measure Concepts97
Ultra-Fast I-V Tests97
Sample Rate99
Segment Arb Waveform100
Pulse Waveforms for Nonvolatile Memory Testing105
Waveform Capture106
DUT Resistance Determines Pulse Voltage Across DUT106
Triggering111
Measurement Types114
Spot Mean Measurements115
Spot Mean Discrete Readings115
Spot Mean Average Readings116
Waveform Measurements116
Waveform Discrete Readings117
Waveform Average Readings118
Measurement Timing119
Kpulse (for Keithley Pulse Cards)122
Keithley Pulse Application122
Starting Kpulse122
Kpulse Setup and Help123
Triggering124
Standard Pulse Waveforms125
Segment Arb Waveforms127
Exporting Segment Arb Waveform Files129
Custom File Arb Waveforms (Full Arb)130
Custom Arb File Operation: Select and Configure Waveforms131
Custom Arb File Operation: Copy Waveforms into Sequencer132
Custom Arb File Operation: Load Waveform and Turn on Output133
Waveform Types134
Use the RPM to Switch the SMU, CVU, and PMU142
Introduction142
Included Accessories143
Equipment Required144
Update the RPM Configuration in Kcon144
Device Connections145
Connection Schematic145
Connect the 4200A-SCS to the DUT146
Set up the Measurements in Clarius147
Create a New Project147
Add a Device148
Search for and Select Existing Tests in the Test Library149
Configure the Vfd Test150
Configure the CV-Diode Test152
Configure the Pulse-Diode Test154
Run the Test156
View and Analyze the Test Results156
PMU for Pulsed I-V Measurements on a MOSFET158
Introduction158
Equipment Required159
Device Connections159
Connection Schematic160
Set up the Measurements in Clarius161
Create a New Project162
Search for and Select an Existing Test162
Configure the Test163
Run the Test and Analyze the Results165
Testing Flash Memory168
Flash Connection Guidelines168
Programming and Erasing Flash Memory169
Endurance Testing174
Connections for Endurance Testing - no Switching Matrix175
Connections for Endurance Testing - Switching Matrix177
Disturb Testing178
Connections for Disturb Testing178
Using a Switching Matrix180
Use Kpulse to Create and Export Segment Arb Waveforms180
Enter Segment Arb Values into UTM Array Parameters182
Direct Connections to Single DUT183
Direct Connections to Array DUT for Disturb Testing185

Tektronix Keithley 4225-PMU - Page 187

Table of Contents