The 3.5 MHz gain-bandwidth product sets the closed-loop bandwidth for a given noise gain.
Supply range and quiescent current — sizing the rail
Each amplifier draws 1 mA quiescent current, so the dual package pulls 2 mA total.
CMOS input — 1 pA bias and 900 µV offset
The CMOS input stage delivers 1 pA typical input bias current. Input offset voltage is 900 µV. The 45 mA output current per channel provides enough drive for moderate loads.
