OPAx377/OPAx377-Q1 CMOS Operational Amplfiers Texas Instruments OPAx377/OPAx377-Q1 CMOS Operational Amplifiers are single-, dual, and quad-channel wide-bandwidth CMOS amplifiers that provide very low noise, low input bias current, and low offset voltage while operating on a low quiescent current of 0.76mA. TI OPAx377/OPAx377-Q1 op amps are optimized for low-voltage, single-supply applications.