The OPAx277 series of precision
operational amplifiers replace the industry standard OP-177. The OPAx277 devices
offer improved noise, wider output voltage swing, and are twice as fast with half
the quiescent current. Features include ultra-low offset voltage and drift, low bias
current, high common-mode rejection, and high power supply rejection.The OPAx277 operate from ±2-V to ±18-V
supplies with excellent performance. Unlike most op amps that are specified at only
one supply voltage, the OPAx277 series is specified for real-world applications; a
single limit applies over the ±5-V (10-V) to ±15-V (30-V) supply range. High
performance is maintained as the amplifiers swing to the 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 applications.The OPAx277 are easy to use and free
from phase inversion and the overload problems found in some other op amps. These
devices are unity-gain stable 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.
