OP275 概述

The OP275 is the first amplifier to feature the Butler Amplifier front-end. This new front-end design combines both bipolar and JFET transistors to attain amplifiers with the accuracy and low noise performance of bipolar transistors, and the speed and sound quality of JFET's. Total Harmonic Distortion plus Noise equals that of previous audio amplifiers, but at much lower supply currents.

A very low l/f corner of below 6 Hz maintains a flat noise density response. Whether noise is measured at either 30 Hz or 1kHz, it is only 6 nV/(root)Hz. The JFET portion of the input stage gives the OP275 its high slew rates to keep distortion low, even when large output swings are required, and the 22 V/µs slew rate of the OP275 is the fastest of any standard audio amplifier. Best of all, this low noise and high speed are accomplished using less than 5mA of supply current, lower than any standard audio amplifier.

The OP275 is specified over the extended industrial (-40°C to +85°C) temperature range. OP275s are availale in both plastic DIP and SOIC-8 packages. SOIC-8 packages are available in 2500 piece reels. Many audio amplifiers are not offered in SOIC-8 surface mount packages for a variety of reasons; however, the OP275 was designed so that it would offer full performance in surface mount packaging.

OP275 特性

• Excellent Sonic Characteristics
• Low Noise: 6 nV/Hz
• Low Distortion: 0.0006%
• High Slew Rate: 22 V/s
• Wide Bandwidth: 9 MHz
• Low Supply Current: 5 mA
• Low Offset Voltage: 1 mV
• Low Offset Current: 2 nA
• Unity Gain Stable
• SOIC-8 Package
• PDIP-8 Package

OP275 应用

• High Performance Audio
• Active Filters
• Fast Amplifiers
• Integrators