This document introduces the features and characteristics of the OP281/OP481 product, including low supply current, single-supply operation, wide input voltage range, rail-to-rail output swing, low offset voltage, and no phase reversal.
The OP281 (dual) and OP481 (quad) are ultralow‑power, single‑supply operational amplifiers with rail‑to‑rail output. They operate from supplies as low as 2.0 V and are specified for typical +3 V and +5 V single‑supply configurations. The devices are offered in 8‑lead SOIC/TSSOP (OP281) and 14‑lead SOIC/TSSOP (OP481) packages.
Key features include a low supply current (≈4 pA per amplifier), low offset voltage (≈1.5 mV), rail‑to‑rail output swing, and fast saturation recovery. They are suited for battery‑powered instrumentation, safety monitoring, remote sensors, and low‑voltage strain‑gage amplifiers.