Datasheet OP275 (Analog Devices)

Dual Bipolar/JFET, Audio Operational Amplifier OP275 FEATURES PIN CONNECTIONS Excellent Sonic Characteristics 8-Lead Narrow-Body SOIC 8-Lead PDIP Low Noise: 6 nV/
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Hz (S Suffix) (P Suffix) Low Distortion: 0.0006% High Slew Rate: 22 V/
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s OUT A 1 8 V+ Wide Bandwidth: 9 MHz OUT A 1 OP275 8 V+ –IN A 2 7 OUT B Low Supply Current: 5 mA OP275 –IN A 2 7 OUT B +IN A 3 6 –IN B Low Offset Voltage: 1 mV V– 4 +IN A –IN B 5 +IN B 3 6 Low Offset Current: 2 nA V– 4 5 +IN B Unity Gain Stable SOIC-8 Package PDIP-8 Package APPLICATIONS High Performance Audio Active Filters Fast Amplifiers Integrators GENERAL DESCRIPTION
Improved dc performance is also provided with bias and offset The OP275 is the first amplifier to feature the Butler Amplifier currents greatly reduced over purely bipolar designs. Input offset front end. This new front end design combines both bipolar voltage is guaranteed at 1 mV and is typically less than 200 µV. and JFET transistors to attain amplifiers with the accuracy and This allows the OP275 to be used in many dc-coupled or sum- low noise performance of bipolar transistors, and the speed and ming applications without the need for special selections or the sound quality of JFETs. Total Harmonic Distortion plus Noise added noise of additional offset adjustment circuitry. equals that of previous audio amplifiers, but at much lower The output is capable of driving 600  loads to 10 V rms while supply currents. maintaining low distortion. THD + Noise at 3 V rms is a low A very low l/f corner of below 6 Hz maintains a flat noise density 0.0006%. response. Whether noise is measured at either 30 Hz or 1 kHz, The OP275 is specified over the extended industrial (–40°C to it is only 6 nVHz. The JFET portion of the input stage gives +85°C) temperature range. OP275s are available in both plas- the OP275 its high slew rates to keep distortion low, even when tic DIP and SOIC-8 packages. SOIC-8 packages are available large output swings are required, and the 22 V/µs slew rate of the in 2500-piece reels. Many audio amplifiers are not offered OP275 is the fastest of any standard audio amplifier. Best of all, in SOIC-8 surface-mount packages for a variety of reasons; this low noise and high speed are accomplished using less than however, the OP275 was designed so that it would offer full 5 mA of supply current, lower than any standard audio amplifier. performance in surface-mount packaging. REV. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or oth-
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PIN CONNECTIONS SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE Typical Performance Characteristics APPLICATIONS Circuit Protection Total Harmonic Distortion Noise Noise Testing Input Overcurrent Protection Output Voltage Phase Reversal Overload or Overdrive Recovery Measuring Settling Time Driving Capacitive Loads High Speed, Low Noise Differential Line Driver A 3-Pole, 40 kHz Low-Pass Filter OP275 SPICE Model OUTLINE DIMENSIONS Revision History