TL972 equivalent / replacement

5 years 8 months ago #1522 by Ray
You need a rail-to-rail op amp, that means that the input/output could go very close to the voltage rails without clipping. The only substitute I know is the Microchip MCP6002.

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5 years 1 month ago - 5 years 1 month ago #1740 by gonzalososa095

Ray wrote: You need a rail-to-rail op amp, that means that the input/output could go very close to the voltage rails without clipping. The only substitute I know is the Microchip MCP6002.


Hi, i have the same problem getting the tl972. Here, in Argentina, the only rail to rail that i can get its the ad623an, do you know if can works? Thank you. Here is the datasheet:

datasheet
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5 years 1 month ago - 5 years 1 month ago #1741 by Ray
Replied by Ray on topic TL972 equivalent / replacement
I have been checking the AD623 and electrically looks good, BUT the problem is that this part is a single op-amp (left) and for the circuit, we need a dual op-amp (right), so you cannot use the AD623 as pin-compatible part:

Attachments:

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5 years 1 month ago #1748 by synesthesia
Well, I simulated TL072 and TL082 work fine BUT (of course there's always a but) being not rail-to-rail cause the output to clip and often being 0.695v ~ 1v less than power supply.

Solution:
Feed through a small-signal via attenuating guitar signal, then gain up the amp instead... :ampmarshall

Desperate electronics enginner | Passionate audio hobbyist.
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