OPA2376: About V- voltage

Hi Toshiyuki,

yes, if you shift all the other potentials reaching the OPAmp into the same direction and if you don't violate the absolute maximum ratings.

Can you show us a schematic?

Kai

Toshiyuki,

I presume your pin numbers (4 and 11) refer to a quad version, OPA4376.  Since there is no internal ground in any of our modern parts, including OPA4376, you may shift supplies anywhere you want as long as the total supply voltage, Vsup_tota l= (V+)-(V-), meets the minimum of 2.2V and maximum of 5.5V specifications listed in OPA4376 datasheet.

Of course, as you shift the supplies, the input common-mode and output voltage ranges, which are defined with respect to supplies, must also move accordingly; therefore, for -5V to 0V supplies, Vcm and Vout linear ranges would move to: -5.1V<Vcm<0.1V and -4.95V<Vout<-0.05V, respectively - see below.

I have simulate the circuit for buffer configuration - see below:

Toshiyuki OPA4376.TSC