Datasheet OP285 (Analog Devices)

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Dual 9 MHz Precision Operational Amplifier OP285 FEATURES PIN CONNECTIONS Low Offset Voltage: 250 V Low Noise: 6 nV/
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Hz Low Distortion: 0.0006% 8-Lead Narrow-Body SO (S-Suffix) High Slew Rate: 22 V/ s Wide Bandwidth: 9 MHz OUT A 1 8 V+ Low Supply Current: 5 mA –IN A 2 7 OUT B Low Offset Current: 2 nA OP285 TOP VIEW +IN A 3 6 –IN B Unity-Gain Stable (Not to Scale) V– 4 5 +IN B SO-8 Package APPLICATIONS 8-Lead Epoxy DIP (P-Suffix) High Performance Audio Active Filters Fast Amplifiers OUT A 1 8 V+ Integrators –IN A 2 7 OUT B – + +IN A 3 6 –IN B + – V– 4 5 +IN B GENERAL DESCRIPTION OP285
The OP285 is a precision high-speed amplifier featuring the Butler Amplifier front-end. This new front-end design com- bines the accuracy and low noise performance of bipolar The combination of low noise, speed and accuracy can be used transistors with the speed of JFETs. This yields an amplifier to build high speed instrumentation systems. Circuits such as with high slew rates, low offset and good noise performance instrumentation amplifiers, ramp generators, bi-quad filters and at low supply currents. Bias currents are also low compared dc-coupled audio systems are all practical with the OP285. For to bipolar designs. applications that require long term stability, the OP285 has a guaranteed maximum long term drift specification. The OP285 offers the slew rate and low power of a JFET amplifier combined with the precision, low noise and low The OP285 is specified over the XIND—extended industrial— drift of a bipolar amplifier. Input offset voltage is laser-trimmed (–40°C to +85°C) temperature range. OP285s are available in and guaranteed less than 250 µV. This makes the OP285 useful 8-pin plastic DIP and SOIC-8 surface mount packages. in dc-coupled or summing applications without the need for special selections or the added noise of additional offset adjustment circuitry. Slew rates of 22 V/µs and a bandwidth of 9 MHz make the OP285 one of the most accurate medium speed amplifiers available. REV. A 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
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