SVR step-by-step assembly instructions

The SVR board, offered since 2004, is a high quality platform that can support most monolithic voltage reference chips using the standard AD587 type pinout (including the AD586). Input power and output connections can be made with copper or gold plated clips such as minigrabbers to the copper test point or wires may be soldered to the corresponding pads. Schematic in pdf. The board is printed in 2 Oz. copper to minimize errors caused by trace voltage drops.

 

We occasionally get requests for step-by-step assembly instructions:

This construction note is for a "basic" assembly of a 5 V AD586 board with no trim components installed.

1)  Open the copper loops very slightly wider than the hole spacing.  Then, using small long nose pliers or forceps, very gently apply pressure to bend them closed just until they slide into the holes.  If done correctly, there is enough remaining spring force to hold them in place for soldering.

  
2)  With the board in some kind of support device, such as a small vise or PCB holder, solder the copper loops in.  Ideally just use enough solder to flow a bit on the other side (the plated through holes are large enough for solder to flow by).  Heat just enough for good solder flow.  
  
3)  You can re-heat as needed from the bottom with the board top side up to improve the top side solder pattern as needed.
  
4)  With a relatively high temperature plastic, you can hold the IC DIP socket in place with your fingers while tack soldering two corner pins.  A small clip vise can hold the solder for this operation.
  
5)  Insert the two capacitors (ceramic on the power supply input side), bend the leads to hold the parts in place, and solder.
  
6)  The flux can be removed with a paper towel wetted with isopropyl alcohol.  
  
7)  The finished board!
  
8) Power up!  Here the board is first powered at 12 V DC.  The output voltage is shown to be 4.999 4 V, well within the manufacturer's laser trimmed specification of +/- 20 mV for the AD586 JN grade part!  Use caution not to connect the power supply with reverse polarity or not to connect the power supply to the reference output terminal (both wrong connections destroy the chip).
 

 

Will add more steps for trim components in the future to make the page complete for a full SVR board.

 

 

 

Our Low Cost Voltage Transfer Project for Amateur Scientists, Electronics Hobbyists, and Schools, was Supported in Part by Analog Devices Incorporated. Please visit the Analog Devices website!

COPYRIGHT © 2005, 2011 JOSEPH M. GELLER

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