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INA194: Decoding TI part numbers

Gary Lynch
Expert 1310 points
Part Number: INA194

I am trying to provide a valid P/N for the INA194 current shunt monitor. When I check a distributor's stock I get many variations on this theme:

  • INA194AIDBVR
  • INA194AIDBVRG4
  • INA194AIDBVT
  • INA194AIDBVTG4
  • INA194AQDBVRQ1

Most manufacturers explain how the part numbers work in the data sheet but this one does not.  I have used Google and the internal search engine, all to no avail, trying to sort this out.

This info should not be secret!

  • 0
    TI__Expert 4915 points

    Hi Gary,

    They are all the same equivalent device, unless otherwise spec'd in the datasheet and the list at the end shows all the options.

    These are the most common variant options:

    • Package option (QFN, SOIC, PDIP, SOT, etc...)
    • Temperature range (industrial, consumer...)
    • Packaging type (reel, tape, etc) and quantity (250 or 3000).
    • The G4 option is obsolete and was used to denote a PB free device back in the early days or RoHS (all devices are PB free now)
    • There might be other designators which are kept for recond (not available to order, but once sold) like the leaded versions.

    For the INA194 in particular there are some four variants, the standard and the automotive, out of which you can choose tape or reel packaging options and within this the quantity (250 or 3000).

    Q1 devices are certified to be used within the automotive sector. These are subject to stricter testing standards and normally cost a bit more.

  • 0 in reply to Carlos Silva85
    Expert 1310 points

    Thanks, Carlos!

    If I interpret your explanation correctly, I need to order the Q1 part to get AEC qualification. The list I got from the distributor had only one such part. (There is no mention of the Q1 suffix in the data sheet.) If I take the P/N apart I get the following:

        INA 194 A Q DBV R Q1
        -+- -+- - - -+- - --
         |   |  | |  |  |  |
         |   |  | |  |  |  +--- AEC-Q100
         |   |  | |  |  |  
         |   |  | |  |  +------ R = Reel (3k parts)
         |   |  | |  |          T = Tape (250 parts)
         |   |  | |  |
         |   |  | |  +--------- SOT23-5 package
         |   |  | | 
         |   |  | +------------ ?
         |   |  |  
         |   |  +-------------- ?
         |   | 
         |   +----------------- Gain = 50 V/V
         |  
         +--------------------- Series = INA


    One of those designators I marked with a question mark is a temperature range. I need -40 to +85 °C. Is the given number correct?

    And regarding my larger question of a general explanation of part numbers I conclude that there is no longer a magic decoder ring. For every TI part I order, if the P/N is not explained in the data sheet, I must post a query to the most applicable forum and wait for an answer.

    Is all this correct?

  • 0 in reply to Gary Lynch
    TI__Expert 4915 points
    Hi Gary,

    TI doesn't have a magic decoder as over the years we acquired a number of other companies. It would be confusing to change the designators, given that some customers were already working with the part references from the previous vendor.

    As to your question A denotes the device revision. Where Silicon errors were found or improvements latter added we might have different part revisions. Sometimes no letter is added here. Temperature ranges are normally spec'd on the datasheet using the device P/N. Some standards we have are:

    I/Q: Automotive Standard (-40...125C)
    E: Extended Range (-40...150C)

    Consumer applications don't normally have a letter associated and are typically rated 0 to 85C.

    Thank you for your patience and I hope this has helped with your your query