The OPAx277 series precision operational amplifiers replace the industry standard
OP-177. They offer improved noise, wider output voltage swing, and are twice as fast with half the
quiescent current. Features include ultralow offset voltage and drift, low bias current, high
common-mode rejection, and high power supply rejection. Single, dual, and quad versions have
identical specifications, for maximum design flexibility.
OPAx277 series operational amplifiers operate from ±2-V to ±18-V supplies with excellent
performance. Unlike most operational amplifiers which are specified at only one supply voltage, the
OPAx277 series is specified for real-world applications; a single limit applies over the ±5-V to
±15-V supply range. High performance is maintained as the amplifiers swing to their specified
limits. Because the initial offset voltage (±20 µV maximum) is so low, user adjustment is usually
not required. However, the single version (OPA277) provides external trim pins for special
OPA277 operational amplifiers are easy to use and free from phase inversion and the
overload problems found in some other operational amplifiers. They are stable in unity gain and
provide excellent dynamic behavior over a wide range of load conditions. Dual and quad versions
feature completely independent circuitry for lowest crosstalk and freedom from interaction, even
when overdriven or overloaded.