Alternative Parts


Features and Benefits

  • Guaranteed 3.8nv/√Hz max 1kHz Noise
  • Guaranteed 35.5nv/√Hz max 10Hz Noise
  • Very Low Peak-to-Peak Noise, 80nV Typical
  • Guaranteed 25µV max Offset Voltage
  • Guaranteed 0.6µV/°C max Drift with Temperature
  • Guaranteed 11V/µsec min Slew Rate (OP-37)
  • Guaranteed 1 Million min Voltage Gain

Product Details

The OP-27/OP-37 series of operational amplifiers combine outstanding noise performance with excellent precision and high speed specifications. The wideband noise is only 3nV/√Hz, and with the 1/f noise corner at 2.7Hz, low noise is maintained for all low frequency instrumentation applications. Precision DC specifications match or exceed the best available op amps: offset voltage is 10µV, drift with temperature and time are 0.2µV/°C and 0.2uv/month, respactively; common mode rejection is 126dB, voltage gain is two million. The unity gain compensated OP-27 is an order of magnatude faster than other precision op amps. The decompensated OP-37 is even faster at a gain-bandwidth product of 63MHz an 17V/usec slew rate. These characteristics plus our advanced process and test techniques make the OP-27/OP-37 an excellent choice for performance and reliability in all low noise, precision amplifier applications. In addition, ADI's OP-37 is completely latch-up free in high gain, large capacitive feedback configurations. The acurate, microvolt, low noise signal handling capabilities of the OP-27/OP-37 are taken advantage of in the multiplexed thermocouple application shown.

For applications requiring higher performance see the LT1007 and LT1037 data sheets.


  • Low Level Transducer Amplifier
  • Precision Threshold Detectors
  • Tape Head Preamplifiers
  • Microphone Preamplifiers
  • Direct Couple Audio Gain Stages

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations


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Models for the following parts are available in LTspice:


Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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