DIO2331D is a family of ultra low VOS operational amplifier, with rail-to-rail CMOS input/output and single/dual channels selectable. DIO2331D family has a gain-bandwidth product of 30kHz(typ.), wide operating supply voltage from 1.8V to 5.5V and broad output voltage swing. DIO2331Dconsumes ultra low power, with each channel 1.0μA(typ.) of bias current, which makes DIO2331D be ideal for battery powered device, temperature-sense device, etc.