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OPA544: Request confirmation of accurate operating temperature information in datasheet for OPA544/2544.

Lee SungYun
Intellectual 365 points
Part Number: OPA544
Other Parts Discussed in Thread: OPA2544

Hello?

As title, I would like to inquire because there is a discrepancy in the temperature information.

In datasheet of OPA544;

DESCRIPTION in page 1 -  It is specified for operation over the extended industrial temperature range, –40°C to +85°C.

TEMPERATURE RANGE in page 2 - Operating –40 +85 °C

ABSOLUTE MAXIMUM RATINGS in page 3 - Operating Temperature ................................................. –40°C to +125°C,

PERFORMANCE CURVES in page 4 - 2.8 A at 125 °C (It is explained '2 A min' in FEATURES)

PACKAGING INFORMATION in Addendum-Page 1 - Op Temp (°C) -40 to 85 (Same as search content on site)

In datasheet of OPA2544;

DESCRIPTION in page 1 - The OPA2544 is available in a 11-lead plastic packages and is specified for the –40°C to +85°C temperature range.

TEMPERATURE RANGE in page 2 - Operating Range –40 +85 °C

ABSOLUTE MAXIMUM RATINGS in page 3 - Operating Temperature ................................................. –55°C to +125°C

PACKAGE/ORDERING INFORMATION in page 3 - TEMPERATURE RANGE  –40°C to +85°C

PERFORMANCE CURVES in page 4 - 2.8 A at 125 °C (It is explained '2 A min' in FEATURES)

PACKAGING INFORMATION in Addendum-Page 1 - Op Temp (°C) -40 to 105 (Same as search content on site)

Please confirm with one notation for each product. There are difficulties in selecting products based on temperature range. (Opamps with over 1 A and over 105 degrees are being considered)

Thank you for reading.

  • 0
    TI__Guru 64490 points

    Hi Lee,

    Please see my comments below:

    OPA544

    The Specified Temperature Range (where part will meet datasheet min/max limits): from -40C to +85C

    The Operating Temperature Range (where part will work like an op amp but may NOT meet the min/max limits):  from -40C to +125C

    The Absolute Maximum Junction Temperature (above such temperature the part may be damaged): +150C

    OPA2544

    The Specified Temperature Range (where part will meet datasheet min/max limits): from -40C to +85C

    The Operating Temperature Range (where part will work like an op amp but may NOT meet the min/max limits):  from -40C to +105C

    The Absolute Maximum Junction Temperature (above such temperature the part may be damaged): +150C

  • 0 in reply to Marek Lis
    Intellectual 365 points

    So what is the temperature listed on the website based on?


    OPA544 matches the Specified Temperature Range, but OPA2544 matches the Operating Temperature Range, so it is difficult.

  • +1 in reply to Lee SungYun
    TI__Guru 57751 points

    Hi SungYun,

    The Specified Temperature Range (where part will meet datasheet min/max limits) from -40C to +85C is shown in the table below below, these are guaranteed specification when the power amplifier is operating within the temperature range. 

    The Operating Temperature Range (where part will work like an op amp but may NOT meet the min/max limits):  from -40C to +125C

    When the power amplifier is operating outside of 85C to +125C, the performance figures listed in the able may or may not meet. There will be some deviations from the performance figures published outside of the Tamb range from -40C to +85C, and the high temperature related performance figures will NOT be guaranteed by TI. However, you need to be aware of the max limits, if the Tamb is operating from 85C to +125C.  If you have adequate cooling in the part (say heatsink with good fan and/or cool air convection or cooling block), this part should work normally. You may estimate the OPA544's power dissipation in a given setup, and calculated the part's internal Tj temperature via Spice simulation based on the thermal information below.

    The min/max figures listed in the datasheet are based on the lab testing data under the specified load conditions. 

    OPA544 matches the Specified Temperature Range, but OPA2544 matches the Operating Temperature Range, so it is difficult.

    OPA2544 is dual package of OPA544, and its internal junction temperature Tj will run hotter under the validated testing conditions in the lab, therefore, the datasheet is capped the Tamb for OPA2544 from -40C to +105C. This is likely the reasons that OPA2544 power amplifier's operating temperature is specified up to +105C, not +125C. 

    Both Si dies inside the packages are identical, and the absolute max. Tj is specified at 150C. 

    If you have other questions, please let us know. 

    Best,

    Raymond

  • 0 in reply to Raymond Zhang1
    Intellectual 365 points

    Thank you for the detailed answer.

    Temperature OPA544 OPA2544
    Specified(=Data table) 85 Max. 85 Max.
    Operating(=OPAMP) 125 Max. 105 Max.

    If I summarize it in a table, it looks like this, but why does the TI website show OPA544 as specified temp and OPA2544 as operating temp?

    I am inquiring because I think that if both are expressed as operating temp, OPA544 will be 125 degrees and OPA2544 will be 105 degrees.

    S.Y.Lee

  • +1 in reply to Lee SungYun
    TI__Guru 57751 points

    Hi SungYun,

    Ok, I see why you are confused. The website information in OPA544 had a typo, which the operating temperature should be listed from -40C to 125C. Please reference TI's product datasheet as in the future, since the datasheet information is generally vetted more thoroughly. I am unable to say that this is always the case, but generally speaking that this is correct. 

    Thanks for pointing out the typos! I will make a note of it and ask someone to correct the information. 

    Best,

    Raymond 

  • 0 in reply to Raymond Zhang1
    Intellectual 365 points

    This resolved my issue, really.

    Thank you.