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LM2903: electrical differences between rev. A and rev. B?

Part Number: LM2903

Dear team,

After few testes on LM2903DR rev. A and LM2903DR rev. B ( PCN# 20210318001.1), the device in Rev. A has given some different behavior during the tests.

Is there any electrical differences between Rev. A and Rev. B to justify a different behavior?

Thanks,

Giorgia

  • Hello Georgia,

    Yes. There is a summary on the front page, the major differences being input bias current, supply current and speed.

    When operated within datasheet specifications, the two devices should be similar.

    The new die tends to be a little more sensitive to noises and glitches, due to the lower typical offset and faster response time.

    The easiest way to determine which die is used is to look at the "Chip Country of Origin (21L)" field on the box
    or bag packing label. Please ignore the "(2P) Rev:" revision field, as it is not relevant to which version of die is
    present, but only to the die revision of the particular die version contained.


    If the Chip Country of Origin "(21L) CCO:" field says "USA", then this is the "classic" die.


    If the Chip Country of Origin "(21L) CCO:" field says "CHN", then this is the new die.

  • Hi Giorgia,

    what differencies did you observe? Is there a circuit in which the LM2903 is used and do you observe problems there? If so, can you show a schematic? I ask because the most issues are the result of an improper design and not so much the result of a change of chip specifications.

    Kai

  • Thanks Kai. We will wait for Giorgia's update. 

  • Closing this post as we have not heard from you Giogia. Feel free to reply back  if you have any updates.