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OP285:  Dual, 9 MHz Precision Operational Amplifier

The OP-285 is a precision high speed amplifier featuring the Butler Amplifier front-end. This new front-end design combines the accuracy and low noise performance of bipolar transistors with the speed of JFETs. This yeilds an amplifier with high slew rates, low offset and good noise performance at low supply currents. Bias currents are also low compared to bipolar designs.

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OP285:  Dual, 9 MHz Precision Operational Amplifier

Product Description

The OP-285 is a precision high speed amplifier featuring the Butler Amplifier front-end. This new front-end design combines the accuracy and low noise performance of bipolar transistors with the speed of JFETs. This yeilds an amplifier with high slew rates, low offset and good noise performance at low supply currents. Bias currents are also low compared to bipolar designs.

The OP-285 offers the slew rate and low power of a JFET amplifier combined with the precision, low noise and low drift of a bipolar amplifier. Input offset voltage is laser-trimmed and guaranteed less than 250 µV. This makes the OP-285 useful in dc coupled or summing applications without the need for special selections or the added noise of additional offset adjustment circuitry. Slew rates of 22V/µs and a bandwidth of 9MHz make the OP-285 one of the most accurate medium speed amplifiers available.

The combination of low noise, speed and accuracy can be used to build high speed instrumentation systems. CIrcuits such as instrumentation amplifiers, ramp generators, bi-quad filters and dc coupled audio systems are all practical with the OP-285.

For applications that require long term stability, the OP-285 has a guaranteed maximum long term drift specification.

The OP-285 is specified over the XIND-extended industrial- (-40°C to +85°C) temperature range. OP-285s are available in 8-pin plastic DIP and SOIC-8 surface mount packages.

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TOOLS, SOFTWARE & SIMULATION MODELS

  • Low Offset Voltage: 250 µV
  • Low Noise: 6 nV/√Hz
  • Low Distortion: 0.0006%
  • High Slew Rate: 22 V/µs
  • Wide Bandwidth: 9 MHz
  • Low Supply Current: 5 mA
  • Low Offset Current: 2 nA
  • Unity-Gain Stable
  • SO-8 Package
  • -3dB Bandwidth: 9MHz
  • Slew Rate: 22V/µs
  • Vos: 35µV
  • Ib: 100nA
  • Input Noise (nV/rtHz): 6nV/rtHz
  • Vcc-Vee Supply (V): 9 to 44
  • Iq per Amplifier: 2.5mA
  • # OpAmps per Pkg: 2
  • Operating Temp Range: -40 to +85
  • Packages: SOIC

Pin Configuration Diagram for OP285

Similar Products

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Part# Small Signal Bandwidth Slew Rate Vos Ib V Noise Density Amplifiers Per Package Widest Temp Range (°C)
OP285 9MHz 22V/µs 35µV 100nA 6nV/rtHz 2 -40 to +85
OP275 9MHz 22V/µs 1mV 100nA 6nV/rtHz 2 -40 to +85
AD8620 25MHz 50V/µs 85µV 2pA 6nV/rtHz 2 -40 to +125
AD8652 50MHz 41V/µs 100µV 1pA 5nV/rtHz 2 -40 to +125
ADA4898-1 65MHz 55V/µs 20µV 100nA 900pV/rtHz 1 -40 to +105
AD8599 10MHz 16.8V/µs 10µV 25nA 1.15nV/rtHz 2 -40 to +125
AD8616 24MHz 12V/µs 23µV 200fA 6nV/rtHz 2 -40 to +125
AD8672 10MHz 4V/µs 20µV 3nA 2.8nV/rtHz 2 -40 to +125
AD8676 10MHz 2.5V/µs 12µV 500pA 2.8nV/rtHz 2 -40 to +125
AD823 16MHz 25V/µs 700µV 5pA 16nV/rtHz 2 -40 to +85
AD8397 69MHz 53V/µs 1mV 200nA 4.5nV/rtHz 2 -40 to +85
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Pricing, Packaging & Availability

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Model
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The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.