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Level shifing - IC or amp ops , need schematics

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whee_man

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avdd refecence dspic

Hi,

I've a dspic30f and i want to acquire an AC signal (+/- 10V) to do some amplitude and frequency analysis (up to the 40th harmonic - 2000kHz ).

How can i convert from a +/-10V signal to a 0V to +5V signal for ADC acquisition? Is there a IC capable of doing this job?

I suppose i can do this by using a couple amp ops (1 for offset, other with <1 gain), but i can't find any schematics for doing this.
Can someone help me?

Sorry for my bad English. :oops:

Rgds
Whee_man
 

FvM

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Level shifing - IC

You can use of course "a couple amp ops", but two resistors (or possibly three, if you want to use the Avdd reference voltage for level shift) are sufficient.
 

whee_man

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Re: Level shifing - IC

FvM said:
You can use of course "a couple amp ops", but two resistors (or possibly three, if you want to use the Avdd reference voltage for level shift) are sufficient.
How would you mount the resistors? Can you supply the schematic for that suggestion?

Rgds
Whee_man
 

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