Dual Bipolar/JFET, Audio Operational Amplifier

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/s 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
Improved dc performance is also provided with bias and offset currents greatly reduced over purely bipolar designs. Input offset voltage is guaranteed at 1mV and is typically less than 200V. This allows the OP275 to be used in many dc coupled or summing applications without the need for special selections or the added noise of additional offset adjustment circuitry.
The output os capable of driving 600 Ohm loads to 10 V rms while maintaining low distortion. THD + Noise at 3 V rms is a low 0.0006%.
By Analog Devices, Inc.
OP275 's PackagesOP275 's pdf datasheet
OP275GP PDIP
OP275GPZ PDIP
OP275GS SOIC
OP275GS-REEL SOIC
OP275GS-REEL7 SOIC
OP275GSZ SOIC
OP275GSZ-REEL SOIC
OP275GSZ-REEL7 SOIC




OP275 Pinout, Pinouts
OP275 pinout,Pin out
This is one package pinout of OP275,If you need more pinouts please download OP275's pdf datasheet.

OP275 Application circuits
OP275 circuits
This is one application circuit of OP275,If you need more circuits,please download OP275's pdf datasheet.


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