ECE 191: Project 11 Winter 2004

1
ECE 191 Project 11Winter 2004

• Breakout Box for Testing High Voltage Operational
  Amplifier
• Sponsor SPAWAR
• Mentor Eric Noel Cartegena
• Members David Kruidhof
• Jesse Ghassan
• William Su

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Agenda

• Gantt chart
• Tasks and accomplishments
• Breakout box design
• Test board design
• Future plans
• Summary

3
Gantt Chart
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Tasks and Accomplishments

• Contacted mentor-Jesse
• Preliminary design of breakout box-David
• Researched op amp test procedures-Everyone
• Went to Frys Electronics-William
• -Collected part information
• -Submitted part list to mentor
• Contacted SPAWAR security-Jesse
• -checked status of clearance

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Breakout Box Design
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Breakout Box
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Breakout Box Description

• Requirements
• 3x3 inch box, 1 inch deep
• 3 coaxial ports
• 3 banana plug ports
• Flat pack port on top
• Problem
• Socket port is fragile, if the op amp is
  attached/detached too many times, socket is prone
  to breaking
• Solution
• Look into ways of reinforcing the socket

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Test Board Description

• Board purpose
• -Tests most of the DC parameters of
  individual op amps
• Design
• -6 onboard test circuits used to
  perform 15 measurements
• Board used to test the following parameters
• -Input offset voltage, bias current,
  input offset current
• -Power supply rejection ratio
• -Output voltage swing, open loop gain,
  slew rate, rise/fall time
• -Percent overshoot , settling time,
  gain bandwidth product
• -Phase margin, input noise
• .

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Test Board Description

• 2 layer PCB design
• Dimensions 6in x 5in
• Die is placed inside a special 24-pin Dip
• Dip is placed onto a ZIF (zero insertion force)
  socket
• ZIF socket allows for any op amp to be tested
• Circuits can be accessed by switches
• Only one circuit can be used at a time

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Future Plans

• Construct ZIF socket adapter used to interface op
  amp with test board
• Construct breakout box based upon design.
• Go to SPAWAR and begin testing of high voltage
  operational amplifiers
• Next weeks presentation
• -In depth analysis of test board
• -Breakout box progress
• -Initial test results.

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Summary

• Breakout Box
• -Presented design
• -Conceptual drawings
• Test board overview
• Overview of board use and construction
• Board operation
• Future plans