LMC555 Astable temperature drift

David Munoz-Paniagua

Other Parts Discussed in Thread: LM555, LMC555

I would like to know what is the astable accuracy and drift with temperature for this device. The MDS for the LM555 contains this information clearly:

but the LMC555 gives:

As far as I can tell SW2 and SW4 closed would give a monostable circuit. What is the value for an astable circuit? Is there a graph you could perhaps provide? Does the frequency increase or decrease with temperature?

Thanks

David

over 11 years ago

0 Alan O over 11 years ago

TI__Mastermind 32575 points

Hi David,

I have forwarded your inquiry to the product line supporting LMC555.

Regards,
Alan

0 Michael Stout over 11 years ago in reply to Alan O

TI__Genius 16890 points

Hello,

The test circuit for astable operation is Figure 3. The spec fA, Astable Frequency, in the Electrical Characteristics table shows the astable frequency when switch 1 and 3 are closed. The spec dt/dT shows the amount of change with temperature.

Mike

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LMC555 Astable temperature drift