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Model 2651A High Power

System SourceMeter

Instrument

User’s Manual

2651A-900-01 Rev. A / March 2011

Summary of content (76 pages)

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www.keithley.com Model 2651A High Power System SourceMeter® Instrument User’s Manual 2651A-900-01 Rev.
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Model 2651A High Power System SourceMeter® Instrument User's Manual © 2011, Keithley Instruments, Inc. Cleveland, Ohio, U.S.A. All rights reserved. Any unauthorized reproduction, photocopy, or use the information herein, in whole or in part, without the prior written approval of Keithley Instruments, Inc. is strictly prohibited. All Keithley Instruments product names are trademarks or registered trademarks of Keithley Instruments, Inc.
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Safety Precautions The following safety precautions should be observed before using this product and any associated instrumentation. Although some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury.
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the equipment may be impaired. Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating information, and as shown on the instrument or test fixture panels, or switching card. When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard. Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground connections.
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Table of Contents Introduction ................................................................................................................. 1-1 Welcome .............................................................................................................................. 1-1 Extended warranty ............................................................................................................... 1-1 Introduction to this manual...............................................................
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Table of Contents Model 2651A High Power System SourceMeter® Instrument User's Manual Capturing high power pulse waveforms................................................................... 5-1 Introduction to capturing waveforms .................................................................................... 5-1 Equipment needed for this example .................................................................................... 5-1 Set up communication................................................
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Model 2651A High Power System SourceMeter® Instrument User's Manual Table of Contents The internal web page of the instrument is not accessible .................................................. 8-1 Save the present state of the instrument ............................................................................. 8-2 LabVIEW driver for the Model 2651A .................................................................................. 8-2 Next steps.......................................................
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Section 1 Introduction In this section: Welcome .................................................................................. 1-1 Extended warranty ................................................................... 1-1 Introduction to this manual ....................................................... 1-1 CD-ROM contents.................................................................... 1-2 Organization of manual sections .............................................. 1-2 Model 2651A applications ...
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Section 1: Introduction Model 2651A High Power System SourceMeter® Instrument User's Manual CD-ROM contents Two CD-ROMs are shipped with each Model 2651A order. The Model 2651A Quick Start Guide, User's Manual, and Reference Manual are provided in PDF format on the Model 2651A Product Information CD-ROM. • Quick Start Guide: Provides unpacking instructions, describes basic connections, and reviews basic operation information.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 1: Introduction • Characterization of power discretes (on page 6-1): Demonstrates how to use the Keithley Instruments Model 2651A with a second Series 2600A System SourceMeter® instrument to characterize power MOSFETs and IGBTs. This example introduces the interaction between two instruments' trigger models.
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Section 2 Using the front-panel interface In this section: Introduction .............................................................................. 2-1 Front panel ............................................................................... 2-1 Introduction Before starting this section, complete the tasks outlined in the Model 2651A Quick Start Guide.
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Section 2: Using the front-panel interface Model 2651A High Power System SourceMeter® Instrument User's Manual Figure 1: Front panel 2 3 +/MODE 6 0 REL FILTER 3 0000 DIGITS SPEED NF CONFIG 1 LOAD 2 RUN STORE RECALL PU R TE N 9 LIMIT 5 AUTO TO E D IT / E 8 MEAS 4 SH 7 SRC 2651A HIGH POWER SYSTEM SourceMeter ® N PU DISPLAY TO E DIT / E R SrcA:+20.0000 A LimAL10.0000V POWER SH TE ARM +3.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 2: Using the front-panel interface Figure 2: Setup and control keys DISPLAY 7 8 9 +/- SRC MEAS LIMIT MODE 4 5 DIGITS SPEED CONFIG 1 LOAD 2 RUN 6 0 REL FILTER 3 0000 STORE RECALL AUTO CURSOR LOCAL TRIG MENU EXIT ENTER Key descriptions Key Description DISPLAY Toggles between the various source-measure displays and the user message mode. CONFIG Configures a function or operation.
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Section 2: Using the front-panel interface Model 2651A High Power System SourceMeter® Instrument User's Manual To change a value using the navigation wheel : 1. Turn the navigation wheel when selected). 2. Press the navigation wheel 3. Turn the navigation wheel 4. Press the navigation wheel 5. Repeat these steps as needed to change the value. 6. Press the ENTER key or the navigation wheel to go to the character you want to change (the character blinks to edit that character.
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Section 3 Using the web interface In this section: Introduction .............................................................................. 3-1 Connect to the instrument web interface .................................. 3-1 Web interface home page ........................................................ 3-2 IP configuration tab .................................................................. 3-2 TSB Embedded........................................................................ 3-3 Reading buffers.....
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Section 3: Using the web interface Model 2651A High Power System SourceMeter® Instrument User's Manual Once the Model 2651A is configured correctly and connected to the LAN, you can use the LXI® Discovery Browser to identify the IP addresses of LXI certified instruments that are set up for automatic IP address selection. Once identified, you can double-click the IP address in the LXI Discovery Browser to open the web interface for the instrument.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 3: Using the web interface NOTE You must reload the page if you change the gateway or subnet mask from the Modify IP configuration page. If you change the IP address, you must type the new IP address in the address bar before you can use the web interface again.
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Section 3: Using the web interface Model 2651A High Power System SourceMeter® Instrument User's Manual Exercise: Create and run a script with TSB Embedded The following programming example illustrates the setup and command sequence of a basic source-measure procedure with the following parameters: • Source function and range: Volts, autorange • Source output level: 5 V • Current compliance limit: 10 mA • Measure function and range: Current, 10 mA To create and run a sample script with TSB Embedde
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 3: Using the web interface Figure 5: TSB Embedded page 1 2 3 basic_source_measure basic_source_mea -- Restore Model 2651A defaults... 4 5 smua.nvbuffer1.clear() smua.nvbuffer1.appendmode = 1 3. Enter the code below in the script box (2). -- Restore Model 2651A defaults. smua.reset() -- Select voltage source function. smua.source.func = smua.OUTPUT_DCVOLTS -- Set source range to auto. smua.source.autorangev = smua.
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Section 3: Using the web interface Model 2651A High Power System SourceMeter® Instrument User's Manual NOTE Commands and parameters for the Model 2651A are case-sensitive. It is important to type in the commands exactly as shown to avoid syntax and execution errors. 4. Click Save Script (3). The script is added to the User Scripts list on the left. Quick Tip Standard edit functions, such as copy, cut, and paste, work in TSB Embedded. 5.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 3: Using the web interface Reading buffers The Reading Buffers tab provides access to the Model 2651A reading buffers. The data used in this example was created and placed in the buffer by the Exercise: Create and run a script with TSB Embedded (on page 3-4). Exercise: Retrieve readings from a buffer To retrieve readings from a populated buffer: 1.
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Section 3: Using the web interface Model 2651A High Power System SourceMeter® Instrument User's Manual Figure 7: Downloading the reading buffer 1 2 3 5. Notice that the Source Value column is not populated. To collect source values, before taking readings, use TSB Embedded to set the following attribute: smua.nvbuffer1.collectsourcevalues = 1. Figure 8: Sample downloaded reading buffer TSP Express The TSP® Express tab provides access to the TSP Express Launch page.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 3: Using the web interface NOTE Only one TSB Embedded or TSP Express session can be running and connected to the same instrument. Figure 9: Select TSP Express To run TSP Express: 1. From the navigation area on the left side of the web interface, select TSP Express. The TSP Express page is displayed. 2. Click the Launch button. The TSP Express window opens. 3. There is a help pane on the right side of the main window.
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Section 3: Using the web interface Model 2651A High Power System SourceMeter® Instrument User's Manual Figure 10: TSP Express 3-10 2651A-900-01 Rev.
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Section 4 Making basic front-panel measurements In this section: Introduction .............................................................................. 4-1 Equipment needed for this example......................................... 4-1 Device connections .................................................................. 4-1 Making front-panel measurements...........................................
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Section 4: Making basic front-panel measurements Model 2651A High Power System SourceMeter® Instrument User's Manual Making front-panel measurements Use the following procedure to configure the instrument and make measurements from the front panel. Step 1: Select and set source level Perform the following steps to select the voltage source and set its value to 10 V: 1. Press the SRC key as needed to select the V-Source, as indicated by the units in the source field on the display.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 4: Making basic front-panel measurements Step 5: Observe readings on the display 1. Observe the readings on the display. Press the TRIG key if necessary to trigger the instrument to begin taking readings. The readings are on the top line, and source and limit values are on the bottom line. For the 10 kΩ resistor, typical display values are: 1.00000mA SrcA: +10.0000 V LimA:010.0000mA 2.
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Section 5 Capturing high power pulse waveforms In this section: Introduction to capturing waveforms ........................................ 5-1 Equipment needed for this example......................................... 5-1 Set up communication.............................................................. 5-1 Device connections .................................................................. 5-2 Configuring the trigger model ................................................... 5-2 Example program code ....
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Section 5: Capturing high power pulse waveforms Model 2651A High Power System SourceMeter® Instrument User's Manual Figure 12: GPIB communication example for fast ADC PU ARM 9 LIMIT 5 1 LOAD 2 RUN R TE N 8 MEAS 4 TO E D IT / E 7 SRC DIGITS SPEED CONFIG NF 2651A HIGH POWER SYSTEM SourceMeter ® N SH DISPLAY TO EDIT / E PU SrcA:+20.0000 A LimAL10.0000V POWER SH R +3.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 5: Capturing high power pulse waveforms Figure 14: Trigger model configuration for fast ADC example Model 2651A Local node* smua.trigger. IDLE_EVENT_ID Idle Arm layer SWEEPING_EVENT_ID arm.count = 1 arm.stimulus SWEEP_COMPLETE_EVENT_ID trigger.timer[1]. stimulus EVENT_ID 0.03 s passthrough = true Trigger layer ARMED_EVENT_ID count = 4 count = 5 source.stimulus SOURCE_COMPLETE_EVENT_ID measure.stimulus trigger.timer[2].
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Section 5: Capturing high power pulse waveforms Model 2651A High Power System SourceMeter® Instrument User's Manual 5. Timer 2 receives the SOURCE_COMPLETE_EVENT_ID event trigger from timer 1 and begins its countdown. 6. The SMU trigger model continues to the End Pulse Event, where it pauses and waits for an event trigger from timer 2. 7. The timer 2 countdown expires and timer 2 outputs an event trigger to the SMU End Pulse Event. 8.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 5: Capturing high power pulse waveforms --[[ Name: CapturePulseV(pulseLevel, pulseWidth, pulseLimit, numPulses) Description: This function outputs voltage pulses with a 1% duty cycle and performs measurements using the fast ADC to capture each pulse in its entirety. At the conclusion of the pulse train, the data is returned to the instrument console in a Microsoft Excel compatible format.
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Section 5: Capturing high power pulse waveforms Model 2651A High Power System SourceMeter® Instrument User's Manual -- Configure the Pulsed Sweep setup ------------------------------------ Timer 1 controls the pulse period trigger.timer[1].count = numPulses - 1 -- -- 1% Duty Cycle trigger.timer[1].delay = pulseWidth / 0.01 trigger.timer[1].passthrough = true trigger.timer[1].stimulus = smua.trigger.ARMED_EVENT_ID -- Timer 2 controls the pulse trigger.timer[2].count trigger.timer[2].delay trigger.timer[2].
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 5: Capturing high power pulse waveforms --[[ Name: CapturePulseI(pulseLevel, pulseWidth, pulseLimit, numPulses) Description: This function outputs current pulses with a 1% duty cycle and performs measurements using the fast ADC to capture each pulse in its entirety. At the conclusion of the pulse train, the data is returned to the instrument console in a Microsoft Excel compatible format.
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Section 5: Capturing high power pulse waveforms Model 2651A High Power System SourceMeter® Instrument User's Manual -- Configure the Pulsed Sweep setup ------------------------------------ Timer 1 controls the pulse period trigger.timer[1].count = numPulses - 1 -- 1% Duty Cycle trigger.timer[1].delay = pulseWidth / 0.01 trigger.timer[1].passthrough = true trigger.timer[1].stimulus = smua.trigger.ARMED_EVENT_ID -- Timer 2 controls the pulse trigger.timer[2].count trigger.timer[2].delay trigger.timer[2].
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 5: Capturing high power pulse waveforms --[[ Name: PrintPulseData() Description; This function prints the data contained in smua.nvbuffer1 and smua.nvbuffer2 in a format that is copy and paste compatible with Microsoft Excel. ]] function PrintPulseData() print("Timestamp\tVoltage\tCurrent") for i=1, smua.nvbuffer1.n do print(string.format("%g\t%g\t%g", smua.nvbuffer1.timestamps[i], smua.nvbuffer2[i], smua.
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Section 5: Capturing high power pulse waveforms Model 2651A High Power System SourceMeter® Instrument User's Manual An example call to this function is as follows: CapturePulseI(50, 300e-6, 50, 5) This call will output five 50 A pulses with a 300 μs pulse width. The pulses will be limited to 10 V and have a 1% duty cycle. At the completion of the pulsed outputs, the SMU output is turned off.
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Section 6 Characterization of power discretes In this section: Introduction to power discrete I-V curve testing ....................... 6-1 Equipment needed for this example......................................... 6-2 Set up communication.............................................................. 6-2 Device connections .................................................................. 6-4 Configuring the trigger model ................................................... 6-5 Example program code .........
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Section 6: Characterization of power discretes Model 2651A High Power System SourceMeter® Instrument User's Manual To avoid device self-heating, this test is usually performed using pulsed measurements. This method pulses voltage across the device for a short duration. During this pulse, after the pulse has settled, the current is measured. The duration of the pulse and the duty cycle in which the pulses are applied to the device are controlled, minimizing self-heating.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 6: Characterization of power discretes Figure 16: GPIB communication overview GPIB Model 2651A (TSP-Link Node #1) TSP-Link Controller Series 26xxA* (TSP-Link Node #2) * Model 260xA, Model 261xA, or Model 263xA When using the TSP-Link communication interface, each instrument must have a unique TSP-Link node number.
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Section 6: Characterization of power discretes Model 2651A High Power System SourceMeter® Instrument User's Manual Device connections To run the test, make the connections as illustrated in the following figure. To ensure good contact, use care when making connections. NOTE For best results, all connections should be left floating (no connections should be tied to ground).
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 6: Characterization of power discretes Configuring the trigger model Correctly configuring the trigger model allows you to achieve pulsed measurements with precise timing and current levels up to 50 A on the Model 2651A. The following figure illustrates this test's overall trigger model configuration, including the interactions between the Model 2651A and the Series 2600A instrument.
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Section 6: Characterization of power discretes Model 2651A High Power System SourceMeter® Instrument User's Manual Figure 19: Trigger model configuration for IV curve characterization Model 2651A (master) node[1]. smua.trigger. IDLE_EVENT_ID Idle Arm layer SWEEPING_EVENT_ID arm.count = 5 arm.stimulus SWEEP_COMPLETE_EVENT_ID trigger.timer[1]. stimulus EVENT_ID 0.03 s passthrough = true Trigger layer ARMED_EVENT_ID count = 20 count = 21 source.stimulus SOURCE_COMPLETE_EVENT_ID measure.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 6: Characterization of power discretes Model 2651A trigger model operation The following figure illustrates this test's Model 2651A trigger model configuration. Figure 20: Model 2651A trigger model for IV curve characterization Model 2651A (master) node[1]. smua.trigger. IDLE_EVENT_ID Idle Arm layer SWEEPING_EVENT_ID arm.count = 5 arm.stimulus SWEEP_COMPLETE_EVENT_ID trigger.timer[1]. stimulus EVENT_ID 0.
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Section 6: Characterization of power discretes Model 2651A High Power System SourceMeter® Instrument User's Manual When the configured trigger model of the Model 2651A is initiated, the following occurs: 1. The source-measure unit (SMU) trigger model passes through the Arm Layer, enters the Trigger Layer, then outputs the ARMED event trigger. 2. The ARMED event trigger triggers TSP-Link® trigger 1, which outputs a trigger on TSP-Link line 1.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 6: Characterization of power discretes Series 26xxA instrument's trigger model operation The following figure illustrates the Series 26xxA trigger model configuration for this test. Figure 21: Series 26xxA instrument's trigger model for IV curve characterization TSP-Link bus Series 26xxA (subordinate)* node[2]. smua.trigger. IDLE_EVENT_ID Idle Arm layer tsplink.trigger[1]. SWEEPING_EVENT_ID arm.
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Section 6: Characterization of power discretes Model 2651A High Power System SourceMeter® Instrument User's Manual 9. The trigger model checks the current Trigger Layer iteration number against the trigger count. • If the iteration number is less than the trigger count, the trigger model stays in the trigger layer and wraps around to the Source Event, where it waits again for an event trigger from TSP-Link Trigger 1. The trigger model repeats from step 2.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 6: Characterization of power discretes --[[ Title: IV Curves Example Script Description: This script will perform a series of IV curves on a MOSFET or IGBT device and will return the data in a Microsoft Excel compatible format for graphing and analysis.
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Section 6: Characterization of power discretes Model 2651A High Power System SourceMeter® Instrument User's Manual smua.measure.autozero = smua.AUTOZERO_ONCE smua.measure.nplc = 0.001 -- NPLC can be increased to improve measurement accuracy. -- However, it should remain small enough to fit the measurement -- within the width of the settled part of the pulse. smua.measure.delay = (pulseWidth - ((1/localnode.linefreq) * smua.measure.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 6: Characterization of power discretes -- Prepare the Drain SMU (2651A) reading buffers smua.nvbuffer1.clear() smua.nvbuffer1.collectsourcevalues = 1 smua.nvbuffer1.fillmode = smua.FILL_ONCE smua.nvbuffer2.clear() smua.nvbuffer2.collectsourcevalues = 1 smua.nvbuffer2.fillmode = smua.FILL_ONCE -- Configure the Gate SMU(26xxA) -------------------------------node[2].smua.reset() node[2].smua.source.func = node[2].smua.
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Section 6: Characterization of power discretes Model 2651A High Power System SourceMeter® Instrument User's Manual -- Prepare the Gate SMU (26xxA) reading buffers node[2].smua.nvbuffer1.clear() node[2].smua.nvbuffer1.collectsourcevalues = 1 if node[2].smua.nvbuffer1.fillmode ~= nil then node[2].smua.nvbuffer1.fillmode = node[2].smua.FILL_ONCE end node[2].smua.nvbuffer2.clear() node[2].smua.nvbuffer2.collectsourcevalues = 1 if node[2].smua.nvbuffer1.fillmode ~= nil then node[2].smua.nvbuffer1.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 6: Characterization of power discretes --[[ PrintIVcurveData(gsteps, dsteps) Description: This function will output the data collected by the IV_Curves() function in a Microsoft Excel compatible format. For each step of the gate, this function will output three columns that contain the drain sweep data and the gate data in the first row.
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Section 6: Characterization of power discretes Model 2651A High Power System SourceMeter® Instrument User's Manual Example program usage The functions of this script allow the sweep parameters of the test to be adjusted without having to rewrite and rerun the script. A test can be executed by calling the function IV_Curves(gstart, gstop, gsteps, dstart, dstop, dsteps, pulseWidth, pulsePeriod, pulseLimit) with the appropriate values passed to it in its parameters.
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Section 7 Increasing SMU current sourcing ability In this section: Introduction to combining SMUs .............................................. 7-1 Combining SMUs to increase current sourcing capability ........ 7-2 Equipment needed for this example......................................... 7-3 Set up communication.............................................................. 7-3 Device connections .................................................................. 7-4 Configuring the trigger model .........
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Section 7: Increasing SMU current sourcing ability Model 2651A High Power System SourceMeter® Instrument User's Manual To avoid device self-heating, this test is usually performed using pulsed measurements. This method pulses current across the device for a short duration. During this pulse (after the pulse has settled), the voltage is measured. The duration of the pulse and the duty cycle in which the pulses are applied to the device are controlled, minimizing self-heating.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 7: Increasing SMU current sourcing ability Equipment needed for this example To run this test, you will need the following equipment: • Two Model 2651A High Power System SourceMeter® Instruments • One Series 2600A System SourceMeter® Instrument; for this application, Series 2600A System SourceMeter® Instrument refers to any of the following instrument models: Models 2601A/2602A, 2611A/2612A, or 2635A/2636A.
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Section 7: Increasing SMU current sourcing ability Model 2651A High Power System SourceMeter® Instrument User's Manual To set the TSP-Link node number using the front-panel interface: 1. Press the MENU key. 2. Select TSPLink. 3. Select NODE. 4. Use the navigation wheel to adjust the node number. 5. Press the ENTER key to save the TSP-Link node number. On the Model 2651A SMU #1 (TSP-Link node #1), perform a TSP-Link reset to update it with the linked instruments: 1. Press the MENU key. 2. Select TSPLink.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 7: Increasing SMU current sourcing ability NOTE For best results, all connections should be left floating (no connections should be tied to ground). Figure 25: Connections for Rds(on) sweep Model 2651A (master node #1) Model 2651A (subordinate node #2) OUTPUT SENSE/GUARD S LO G LO S G G G HI SENSE/GUARD HI S LO G S G G G HI 40V, 50A MAX. OUTPUT LO HI 40V, 50A MAX.
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Section 7: Increasing SMU current sourcing ability Model 2651A High Power System SourceMeter® Instrument User's Manual Configuring the trigger model When the trigger model is correctly configured, you can achieve pulsed measurements with precise timing and current levels up to 100 A for the combined Model 2651A instruments. Refer to the Example program code (on page 7-9) for an implementation of this trigger model.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 7: Increasing SMU current sourcing ability Figure 26: Trigger model configuration for Rds(on) sweep Model 2651A (master) node[1]. smua.trigger. Idle Arm layer IDLE_EVENT_ID SWEEPING_EVENT_ID arm.count = 1 arm.stimulus SWEEP_COMPLETE_EVENT_ID trigger.timer[1]. stimulus EVENT_ID 50e-3 s passthrough = true Trigger layer ARMED_EVENT_ID count = 99 count = 100 source.stimulus SOURCE_COMPLETE_EVENT_ID measure.stimulus trigger.
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Section 7: Increasing SMU current sourcing ability Model 2651A High Power System SourceMeter® Instrument User's Manual Master Model 2651A node[1] trigger model operation In the master Model 2651A (node[1]) trigger model, timer 1 controls the period of the pulse, while timer 2 controls the pulse width. TSP-Link® trigger 1 prompts Model 2651A (subordinate, node[2]) to output its pulse. When the trigger model of the master Model 2651A (node[1]) is initialized, the following occurs: 1.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 7: Increasing SMU current sourcing ability When the trigger model of Model 2651A (subordinate, node[2]) is initialized, the following occurs: 1. The source-measure unit (SMU) trigger model leaves the idle state, flows through the arm layer, enters the trigger layer, and reaches the Source Event, where it waits for an event trigger. 2.
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Section 7: Increasing SMU current sourcing ability Model 2651A High Power System SourceMeter® Instrument User's Manual The following script contains all the code necessary to perform an Rds(on) sweep up to 100 A using two Model 2651A High Power System SourceMeter® Instruments and a Series 2600A System SourceMeter® Instrument.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 7: Increasing SMU current sourcing ability --[[ Name: DualSmuRdson(gateLevel, dstart, dstop, dsteps, pulseWidth, pulsePeriod, pulseLimit) Description: This function uses two 2651A SMUs to perform a pulsed Rds(on) sweep with currents up to 100A.
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Section 7: Increasing SMU current sourcing ability Model 2651A High Power System SourceMeter® Instrument User's Manual -- Set the delay so that the measurement is near the end of the pulse -- Prepare the reading buffers smua.nvbuffer1.clear() smua.nvbuffer1.collecttimestamps smua.nvbuffer1.collectsourcevalues smua.nvbuffer1.fillmode smua.nvbuffer2.clear() smua.nvbuffer2.collecttimestamps smua.nvbuffer2.collectsourcevalues smua.nvbuffer2.fillmode = 1 = 1 = smua.FILL_ONCE = 1 = 1 = smua.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 7: Increasing SMU current sourcing ability -- Configure 2651A #2 (Drain SMU 2) ----------------------------------node[2].smua.reset() node[2].smua.source.func = node[2].smua.OUTPUT_DCAMPS node[2].smua.sense = node[2].smua.SENSE_REMOTE node[2].smua.source.offmode = node[2].smua.OUTPUT_NORMAL node[2].smua.source.offfunc = node[2].smua.OUTPUT_DCAMPS node[2].smua.source.
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Section 7: Increasing SMU current sourcing ability Model 2651A High Power System SourceMeter® Instrument User's Manual -- Configure the 26xxA (Gate SMU) --------------------------------node[3].smua.reset() node[3].smua.source.func = node[3].smua.OUTPUT_DCVOLTS node[3].smua.sense = node[3].smua.SENSE_REMOTE node[3].smua.source.levelv = gateLevel node[3].smua.source.highc = node[3].smua.
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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 7: Increasing SMU current sourcing ability --[[ Function: PrintDualSmuRdsonData() Description: This function processes the data stored in the SMU reading buffers by function DualSmuRdson() and prints back the individual SMU data and the combined SMU data and Rds(on) readings in a format that is copy and paste compatible with Microsoft Excel.
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Section 7: Increasing SMU current sourcing ability Model 2651A High Power System SourceMeter® Instrument User's Manual Example program usage The functions in this script allow the sweep parameters of the test to be adjusted without having to rewrite and rerun the script. A test can be executed by calling the function DualSmuRdson(gateLevel, dstart, dstop, dsteps, pulseWidth, pulsePeriod, pulseLimit) with the appropriate values passed to it in its parameters.
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Section 8 Troubleshooting FAQs In this section: About this section..................................................................... 8-1 Need different line frequency or voltage................................... 8-1 Can I use external trigger lines?............................................... 8-1 The internal web page of the instrument is not accessible ....... 8-1 Save the present state of the instrument.................................. 8-2 LabVIEW driver for the Model 2651A .......................
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Section 8: Troubleshooting FAQs Model 2651A High Power System SourceMeter® Instrument User's Manual • To view the IP address of the Model 2651A, press MENU. Select LAN > STATUS > IP-ADDRESS. If a valid IP address is displayed, the instrument configuration is correct. If 0.0.0.0 is displayed, the IP address is not valid. • If you are using the automatic configuration method over a corporate network, contact your network administrator for assistance.
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Section 9 Next steps In this section: Additional Model 2651A information......................................... 9-1 Additional Model 2651A information This manual has prepared you to start using your new Model 2651A for your real-world applications. For more detailed information about the Model 2651A, refer to the Keithley Instruments Model 2651A Reference Manual, part number 2651A-901-01.
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Index A Action keys RECall • 2-2 STORE • 2-2 C Communication Set up • 5-1, 6-2, 7-3 Compliance Setting front panel compliance limit • 4-2 Connections Device • 4-1, 5-2, 6-4, 7-4 Current Increase sourcing capability • 7-1, 7-2 Curves Example test script • 6-10, 6-16 I-V curves • 6-1, 6-4, 6-5, 6-6, 6-7, 6-9 IV_Curves() parameters • 6-16 D Delete script • 3-6 Discovery Browser, LXI • 3-1 Display Observing readings • 3-7, 4-3 Documentation • 1-2 Download Reading buffer • 3-7 DualSmuRdson() • 7-16 E Examples
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Index TRIG • 2-2 L LabVIEW drivers • 8-2 Linear sweep • 6-5 LXI Discovery Browser • 3-1 Downloading from website • 3-1 M Manuals • 1-2 Measure Simultaneous current and voltage • 5-1 Measurement Fast-sampling ADC • 5-1 Front panel • 4-1, 4-2 Function, selecting • 4-2 Range, selecting • 4-2 Waveforms • 5-1 N Navigation wheel • 2-2, 2-3 NBTI • 5-1 Node TSP-Link • 6-2 Number keys • 2-2 O Operation keys ENTER • 2-2 EXIT • 2-2 FILTER • 2-2 LIMIT • 2-2 LOAD • 2-2 MENU • 2-2 RECall • 2-2 REL • 2-2 RUN • 2-2 TR
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Model 2651A High Power System SourceMeter® Instrument User's Manual Index TSP-Link Nodes • 6-2 V Voltage Source, set level • 4-2 W Warranty • 1-1 Web interface • 3-1 Accessing • 3-1 Browser requirements • 3-1 Home page • 3-2 IP address configuration • 3-2 Reading buffers • 3-7 TSB Embedded • 3-3 TSP Express • 3-8 Using • 3-1 2651A-900-01 Rev.
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Specifications are subject to change without notice. All Keithley trademarks and trade names are the property of Keithley Instruments, Inc. All other trademarks and trade names are the property of their respective companies. A G R E A T E R M E A S U R E O F C O N F I D E N C E Keithley Instruments, Inc. Corporate Headquarters • 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: 440-248-6168 • 1-888-KEITHLEY • www.keithley.