Supply range and output swing — what it buys you
The OPA990IDCKR: Rail-to-rail output means the signal can swing within millivolts of each supply rail — useful when the ADC reference or comparator threshold sits near the rail.
Bandwidth and slew for sensor conditioning
Active lifecycle — no obsolescence clock ticking
SC-70-5 footprint — layout notes
The SC-70-5 (SOT-353) package has a 0.65 mm pitch and a 2.1 mm x 2.0 mm body — small enough for two-layer boards if the supply decoupling cap sits within 5 mm of the pin. The 80 mA output drive per channel is enough to bias a small relay coil or LED, but the power dissipation in a 40 V rail limits continuous current; derate per the package thermal impedance.