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Can OPA335 opamp output zero volts when used with the LM7705?

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treez

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Hello,

I am using an OPA335 opamp as a differential amp with a gain of 100....

...sometimes the input signal will only be 500uV, which would mean an output voltage of 50mV , which is lower than the 100mV minimum achievable output voltage when the OPA335 opamp has a single supply.

.....If i use the LM7705 to supply the opamps "V-" terminal, then will i be able to attain the 50mV output voltage?


LM7705 datasheet
https://www.ti.com/product/lm7705&lpos=Middle_Container&lid=Alternative_Devices

OPA335 Datasheet
https://www.ti.com/lit/ds/symlink/opa335.pdf
 

Yes, but only just.

Ideally you would have rails at +2.5 and -2.5 so the output is more central in range but a negative rail of 0.23V will just about allow you to get zero out for zero in.

Brian.
 
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