OPA4277UA/2K5

1 Features

• Ultra-Low Offset Voltage: 10 μV • Ultra-Low 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 Max

• Wide Supply Range: ±2 to ±18 V • Low Quiescent Current: 800 μA/Amplifier

• Supports Defense, Aerospace, and Medical

2 Applications

• Transducer Amplifier

• Bridge Amplifier

• Temperature Measurements

• Strain Gage Amplifier

• Precision Integrator

• Battery Powered Instruments

• Test Equipment

3 Description

The OPA4277-EP precision operational amplifier replaces the industry standard OP-177. It offers improved noise, wider output voltage swing, and is 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 OPA4277-EP operates from ±2- to ±18-V

supplies with excellent performance. Unlike most operational amplifiers which are specified at only one supply voltage, the OPA4277-EP precision operational amplifier is specified for real-world applications; a single limit applies over the ±5- to ±15-V supply range. High performance is maintained as the amplifier swings to the specified limits. Because the initial offset voltage (±20-μV max) is so low, user adjustment is usually not required.

The OPA4277-EP is easy to use and free from phase inversion and overload problems found in some operational amplifiers. It is stable in unity gain and provides excellent dynamic behavior over a wide range of load conditions. The OPA4277-EP features completely independent circuitry for lowest crosstalk and freedom from interaction, even when overdriven or overloaded.

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