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LM4811: datasheet doesn't specify capacitor type

Hanna Nabil
Prodigy 90 points
Part Number: LM4811

Hello all,

What is really weird is that in the application schematic most of the capacitors are polarized so it gives whoever read the datasheet the feeling that he  should use tantalum capacitors 

also in datasheet page 13 it is written 

""Different types of capacitors (tantalum, electrolytic, ceramic) have unique performance characteristics and may affect overall system performance."""

Will the performance of tantalum be better than ceramic ?

Why there isn't a performance test stated clearly in the datasheet ? all I need is to just use ceramic due to cost but I had the feeling that it might be inconvenient for this IC, so any help ?

  • 0
    TI__Guru* 84915 points

    Hi, Hanna,

    Welcome to E2E and thank you for your interest in our products!

    The most part of the LM devices are sensitive to voltage variations. Some of them are exposed to temperature variations in the different applications where they are used. Using a tantalum capacitor will ensure that the capacitor value won't vary over temperature or against the voltage increments. This will ensure that the voltage (specially on the power supplies) will be stable.

    If a ceramic capacitor is selected, it is important to ensure that the capacitance response won't vary more than 20% in all the operating temperature and voltage ranges. They can be used with the LM4811 but I would suggest to take a look at the capacitor datasheet to ensure that the capacitor derating responses are all fine for the circuit even if there are temperature/voltage variations.

    Please let me know if you have additional questions or comments.

    Best regards,
    Luis Fernando Rodríguez S.