Dual CMOS op-amp for battery-powered signal chains
The ICL7621BCSA+ is a dual CMOS operational amplifier from Analog Devices, delivering 1.4 MHz gain-bandwidth product and 1.6V/µs slew rate with rail-to-rail output swing — suited for low-power sensor conditioning and portable instrumentation where supply headroom is tight. Each channel draws 1 mA supply current, totalling 2 mA for both amplifiers, making it a fit for battery-operated designs that need to balance bandwidth against power budget.
Supply range and input characteristics
Operates from a 2 V to 16 V supply span — the 2 V minimum allows direct operation from two alkaline cells or a single Li-ion cell without a boost converter, while the 16 V max covers standard 12 V and 15 V industrial rails. Input offset voltage is specified at 5 mV maximum — the worst-case DC error the designer must budget for in the gain stage, particularly in precision DC-coupled circuits where the offset multiplies by the closed-loop gain.