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OPA211 - 1.1nV/√Hz Noise, Low Power, Precision Operational
Amplifier

   


  


The OPA211 series’ extremely low voltage and low current noise, high speed, and wide output swing make it an excellent choice as a driver for precision data acquisition systems or as a loop filter amplifier in PLL applications.


The OPA211 series of precision operational amplifiers achieves very low 1.1nV/√Hz noise density with a supply current of only 3.6mA. It also offers rail-to-rail output swing, which maximizes dynamic range. In precision data acquisition applications, the OPA211 series of op amps provides 700ns settling time to 16-bit accuracy even for 10V output swings. This ac performance, combined with only 125AμV of offset and 0.35µV/°C drift over temperature, make the OPA211 ideal for driving fast, high-precision analog-to-digital converters(ADCs) or buffering the outputs of high-resolution digital-to-analog converters(DACs).

The OPA211 is specified over the very wide dual-power supply range of ±2.25V to ±18V, or single-supply operation from +4.5V to +36V.

The OPA211 is available in SO-8 package. A dual version, the OPA2211, is available in the SO-8 PowerPAD™ package. This series of op amps is specified from TA = -40°C to +125°C.

Key Features

  • Low Voltage Noise: 1.1nV/√Hz at 1kHz
  • 0.1Hz to 10Hz NOISE: 80nVPP
  • THD+N: -136dB (G = 1, f = 1kHz)
  • Offset Voltage: 125µV (max)
  • Offset Voltae Drift: 0.35µV/°C (typ)
  • Low Supply Current: 3.6mA/Ch (typ)
  • Unity Gain Stable
  • Gain Bandwidth Product: 80MHz (G = 100) 45MHz (G = 1)
  • Slew Rate: 27V/µs
  • 16-Bit Settling Time: 700ns
  • Wide Supply Range: ±2.25V to ±18V, +4.5V to +36V
  • Rail-to-Rail Output
  • Output Current: 30mA

Applications

  • PLL Loop Filter
  • Low-Noise, Low-Power Signal Processing
  • 16-Bit ADC Drivers
  • DAC Output Amplifier
  • Active Filters
  • Low-Noise Instrumentation Amplifiers
  • Ultrasound Amplifiers
  • Professional Audio Preamplifiers
  • Low-Noise Frequency Synthesizers
  • Infared Detector Amplifiers
  • Hydrophone Amplifiers
  • Geophone Amplifiers
  • Medical


Related Information

Datasheet OPA211 (PDF 797 kB)




 

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