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LM1458: LM1458 operation temerature

ofir aharon
Prodigy 10 points
Part Number: LM1458
Other Parts Discussed in Thread: TLV9002, UA741

Hi,Will the LM1458 work properly at 80°C when the power consumption of the LM1458 does not exceed 0.1mW?
(The supply Voltage are ±2.5V)

  • 0
    TI__Mastermind 30600 points
    Hi Ofir,

    The LM1458 is only guaranteed for 0° to 70° C, so we cannot make any claims about what will happen at 80°C. Further, your supply voltage is below the minimum total supply of 6V for the device. If you use both amplifiers in the device at a 6V total supply, the datasheet maximum power consumption is ~34mW, which is much greater than 0.1mW.

    -Paul
  • 0 in reply to Paul Goedeke
    TI__Mastermind 30600 points
    Ofir,

    I also wanted to add that you should look at the TLV9002 for your application. It can use a +/- 2.5V supply range, is a 1MHz GBW part like the LM1458 and will consume at maximum only 425µW per channel of power over temperature.

    If you don't think that device will work for you, please let me know the details of your application and we can try to find a suitable device for your needs.

    Best,
    Paul
  • 0
    TI__Guru**** 164476 points
    Ofir,

    In addition to what Paul said, The LM1458 is similar to the single channel uA741.
    The uA741 minimum recommend Vcc is +/-5V, so I recommend this minimum voltage for LM1458 also.
    The LM1458 has a believable device schematic that shows ICC will vary with VCC and all the specification are for +/-15V. Therefore +/-2.5V will perform very differently; less bandwidth, slower slew rate, etc.