OPAx310 Operational Amplifiers Texas Instruments OPAx310 Operational Amplifiers are single (OPA310), dual (OPA2310), and quad-channel (OPA4310) amps with a 1.5V to 5.5V low-voltage range. The high output current op-amps feature rail-to-rail input and output swing capabilities. The OPAx310 amps offer a robust ESD performance with a fail-safe input ESD structure where no diodes are connected from inputs to the positive power supply rail. The OPAx310S provides a very fast shutdown response and has a typical enable, disable time of 1µs that allows for power savings when the application involves duty cycling the amplifier signal chain.