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OPA548: OPA548 Characteristics vs. Temperature

Eric Wells
Prodigy 155 points
Part Number: OPA548

The datasheet seems to have some conflicting information for the OPA548. In the electrical characteristics it lists the specified range as -40 to 85C, but in the recommended operating conditions it lists the specified temperature at -40 to 125C. I saw there was a similar question earlier, but this seems to be an error in the datasheet. Which temperature range is this specified over? My main concern is if I run the part at a junction temp between 85 and 125C, could the part not meet parameters specified in the electrical characteristics? Do I need to keep the junction below 85C to get the published datasheet electrical characteristics?

  • 0
    TI__Guru 60570 points

    Eric,

    It is an unfortunate use of word ‘Recommended’ in OPA548 section 7.3 that seems to cause some confusion. The actual specified temperature range for OPA548 is from -40C to 85C while the operating temperature range is from -40C to 125C – see below. And as you correctly pointed out, the datasheet specification limits apply ONLY within the specified temperature range while operating temperature range only says that the part will work as an op amp without guaranteeing any of the specific performance limits.  Thus, in order to assure that the part meets all of the performance limits shown in the datasheet you need to keep the junction temperature below 85 deg C.