OPA277UA/2K5 Audio Power Amplifier IC Precision Amplifiers High
Precision Oper Amplifier 1 Features - Ultralow Offset Voltage: 10 μV
Ultralow Drift: ±0.1 μV/°C High Open-Loop Gain: 134 dB High Common-Mode Rejection: 140 dB High Power Supply Rejection: 130 dB Low Bias Current: 1-nA maximum Wide Supply Range: ±2 V to ±18 V Low Quiescent Current: 800 μA/amplifier Single, Dual, and Quad Versions Replaces OP-07, OP-77, and OP-177
2 Applications 3 Description 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 applications. 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. Device Information
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