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Author Topic: Life time expectancy of an Atmega8 (or similar)? (solved)  (Read 1512 times)

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Offline Metal Slug 2Topic starter

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Life time expectancy of an Atmega8 (or similar)? (solved)
« on: February 10, 2009, 11:13:12 PM »
I was just wondering.....if you were to for example use a $50 robot board with an Atmega8 and have it hooked up to a continuous 6v power supply, program in for example a 'stampy' algorithm and run if 24/7.  How long would the circuit survive for (or more specifically, the Atmega8), assuming there is no disrupting interference with it?
« Last Edit: February 11, 2009, 01:19:07 AM by Metal Slug 2 »

Offline householdutensils

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Re: Life time expectancy of an Atmega8 (or similar)?
« Reply #1 on: February 10, 2009, 11:17:24 PM »
From the Datasheet:
 
Quote
Data retention: 20 years at 85C/100 years at 25C

That value is defined as:

Quote
Reliability Qualification results show that the projected data retention failure rate is much less
than 1 PPM over 20 years at 85C or 100 years at 25C.

I don't know if that's what you want, but it seems relevant :D
« Last Edit: February 10, 2009, 11:21:12 PM by householdutensils »

Offline householdutensils

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Re: Life time expectancy of an Atmega8 (or similar)?
« Reply #2 on: February 10, 2009, 11:19:55 PM »
Sorry!! Hit the quote button instead of the modify button  :-X

Offline Metal Slug 2Topic starter

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Re: Life time expectancy of an Atmega8 (or similar)?
« Reply #3 on: February 11, 2009, 01:16:23 AM »
Wow, thats much longer than I expected!  Awesome, :)
Thanks.

Offline Admin

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Re: Life time expectancy of an Atmega8 (or similar)? (solved)
« Reply #4 on: February 11, 2009, 08:56:11 AM »
Depends on how much you write to memory. RAM will fail after so many rewrites, check the datasheet. I think the number was in the millions or billions.

EEPROM will fail after about ~100,000 rewrites.

Of course this follows a bell curve, not an exact number.

Offline pomprocker

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Re: Life time expectancy of an Atmega8 (or similar)? (solved)
« Reply #5 on: February 11, 2009, 10:54:57 AM »
the hardware aspect may also fail. Not sure how long servos can survive after constant use

EDIT:  But like any good technician attending to a piece of machinery, there is always scheduled preventative maintenance.
« Last Edit: February 11, 2009, 10:55:52 AM by pomprocker »

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Re: Life time expectancy of an Atmega8 (or similar)? (solved)
« Reply #6 on: February 15, 2009, 05:51:30 AM »
Quote
the hardware aspect may also fail. Not sure how long servos can survive after constant use

good question!
http://www.societyofrobots.com/robotforum/index.php?topic=1300.0

 


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