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Keysight

E2613/4/5/6A & E2643/4A

Wedge Probe Adapters

User’s Guide

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Summary of Contents for E2613A

Page 1: ...Keysight E2613 4 5 6A E2643 4A Wedge Probe Adapters User s Guide ...

Page 2: ... this docu ment are furnished under a license and may be used or copied only in accordance with the terms of such license Restricted Rights Legend If software is for use in the performance of a U S Gov ernment prime contract or subcontract Software is delivered and licensed as Commercial computer software as defined in DFAR 252 227 7014 June 1995 or as a commercial item as defined in FAR 2 101 a o...

Page 3: ...ed Devices 10 Connecting the Adapter to an IC 13 Common Ground Plane on 16 Pin Adapters 14 Connecting the Adapter to an Instrument 16 Keysight Oscilloscopes and Logic Analyzers 16 Other Instruments 17 Cleaning an Adapter 18 Repairing an Adapter 19 Typical Bent Wedge Segments 19 Severely Bent Wedge Segments 20 Pinched Air Gap 21 ...

Page 4: ...4 ...

Page 5: ...rovides accurate mechanically non invasive contact to the TQFP PQFP package pins Accessories such as flexible leads enable you to connect to various oscilloscope probes and logic analyzers When the guidelines documented in Critical Connection Information on page 8 are followed the wedge probe adapter will provide you with many cycles of problem free probing Figure 1 Adapters Connected to TQFP PQFP...

Page 6: ...8 0141 for quantity of 1 jumper The adapters can be connected Directly to 1145A and 1155A active probes 1160 1 2 3 4 5A passive probes via provided dual lead adapter N2870A series passive probes via N2877A N2879A accessory kits Table 1 Available Wedge Probe Adapters Adapter IC Pin Spacing Signal Count Qty Image E2613A 0 5 mm 3 1 E2614A 0 5 mm 8 1 E2615A 0 65 mm 3 1 E2616A 0 65 mm 8 1 E2643A 0 50 m...

Page 7: ...erating Voltage 40V dc peak ac Operating Current 0 5A maximum Capacitance Between Contacts 2 pF typical all except E2643 4A 4 33 pF typical at 1 MHz E2643 4A Self inductance 15 nH typical all except E2643 4A 37 nH typical at 1 MHz E2643 4A Cross Coupling 31 dB typical at 100 MHz E2643 4A Contact Resistance 0 1 Ohm ...

Page 8: ...th green Figure 2 Adapter Conductors Inserted Between IC Pins Figure 3 shows that wedge segments consists of two separate conductors insulated from each other by a center insulator A shortened insulating adhesive between the center insulator and the outer conductors creates an air gap at the tip of the wedge segment The air gap allows the conductors to conform as the adapter is inserted between th...

Page 9: ... 65 mm pin spacing gaps While it has been tested for 30 000 insertions damage to the wedge probe adapter can easily occur if not used with care CAUTION Always use the magnifying glass provided to ensure the conductors of the wedge probe adapter are accurately aligned with the dam bar gaps before applying pressure to insert CAUTION Ensure that you use the correct size wedge probe adapter for the pa...

Page 10: ...rred to as the dam bar gap The dam bar gap is critical for this type of probing because the wedge segments actually make electrical contact with the pins of the TQFP PQFP package in this area When probing always check the width of the dam bar gap to make sure it is free of excess solder See Figure 5 on page 11 Wicking of solder up the pin and into the dam bar region reduces the dam bar gap width w...

Page 11: ...Critical Connection Information 11 Figure 5 Dam Bar Gaps and Pin Spacing ...

Page 12: ...Critical Connection Information 12 Figure 6 Supported Surface Mounted Integrated Circuits ...

Page 13: ...ner packages such as the TQFP type the dam bar gap portion of the IC pin is often located on the bend of the pin requiring insertion of the wedge probe adapter at a lesser angle than 90 as shown in the bottom portion of the figure Figure 7 Adapter Insertion Techniques Once the adapter is properly located between the IC pins and in the dam bar gap apply pressure so the adapter becomes fully seated ...

Page 14: ... the IC Try inserting the adapter on the portion of the IC pins closer to the body of the IC the IC may be a ceramic package which has no dam bar gap The adapters are not designed for this type of IC package Common Ground Plane on 16 Pin Adapters Figure 8 on page 15 shows the pin number assignments for each probe The top side of the 16 pin wedge probe adapters have pins numbered 1 through 16 and p...

Page 15: ...Connecting the Adapter to an IC 15 Figure 8 Adapters Pins ...

Page 16: ...logic analyzers For Keysight oscilloscope probes use a dual lead adapter as shown below Figure 9 Adapters Connected Using a Dual Lead Adapter Table 3 Dual Lead Adapters for Keysight Oscilloscope Probe Families Keysight Probe Family Dual lead Adapter Part Number Image N2870A series 0960 2898 sold separately or with N2877A N2879A accessory kits 10070 series 8710 2063 10400A series 5081 7742 ...

Page 17: ...e adapter to disconnect from the IC The adapter pins are 0 635 mm square You can build your own flexible lead as shown in Figure 10 This requires a socket designed to fit a 0 380 to 0 635 mm square pin at the end of the wire that will be connected to the wedge probe adapter You will need to define the size of the socket at the probe end of the wire The probe for your instrument may include flexibl...

Page 18: ...function 1 Use a common toothbrush to remove any dust between the wedge segments The individual wedge segments are very robust and will not be damaged by vigorous brushing Figure 11 Brush in The Direction Shown 2 Use precision dusting cleaner also known as inert dusting gas or compressed air in a can to remove debris loosened by the brushing ...

Page 19: ...raighten them as much as possible 2 Repeat this on each bent wedge segment conductor Figure 12 Straightening Wedge Segments 3 Hold the Wedge Probes Adapter conductors tightly together with tweezers and flex to straighten each individual wedge segment as shown in Figure 13 on page 20 WARNING To avoid possible injury exercise care when using any sharp tool ...

Page 20: ...tor enough that you can get tweezers on it 3 Gently straighten out wedge segment conductors using tweezers as shown in Figure 14 on page 21 NOTE Even though the bent section often breaks due to metal fatigue an electrical connection is often made because there are two electrical contact points on each pin of the TQFP PQFP package For more information on how electrical connection is made refer to C...

Page 21: ...following instructions tell you how to correct this problem 1 Turn the probe so that the wedge segments are facing up 2 Use a x20 or x40 microscope so you can see the pinched wedge segment 3 Insert the edge of a single edged razor blade between the center insulator and the conductor 4 Gently pry the conductor away from the center insulator to open the gap WARNING To avoid possible injury exercise ...

Page 22: ...Repairing an Adapter 22 Figure 15 Repairing a Pinched Air Gap ...

Page 23: ...Repairing an Adapter 23 ...

Page 24: ... E2613 92010 Keysight Technologies Inc Manual Part Number E2613 92010 ...

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