Back to Analog Devices Inc.

Analog Devices Inc. ADA4805 High-Speed Amplifiers

Analog Devices ADA4805-1 / ADS4805-2 High-Speed Amplifiers are high-speed voltage feedback, rail-to-rail output amplifiers with an exceptionally low quiescent current of 500μA, making them ideal for low-power, high-resolution data conversion systems. Despite being low power, ADI ADA4805 amplifiers provide excellent overall performance. They offer a high bandwidth of 105MHz at a gain of +1, a high slew rate of 160V/μs, and a low input offset voltage of 125μV (maximum). A shutdown pin allows further reduction of the quiescent supply current to 2.9μA. For power-sensitive applications, the shutdown mode offers a very fast turn-on time of 3μs. This allows the user to dynamically manage the power of the amplifier by turning the amplifier off between ADC samples. ADA4805-1 / ADA4805-2 operate over a wide range of supply voltages from ±1.5V to ±5V, as well as single 3V and 5V supplies, making them ideal for high speed, low power instruments.

Features

  • ADA4805-1 Features
  • Low input offset voltage: 125μV (maximum)
  • Low input offset voltage drift
    • 0.2μV/°C (typical)
    • 1.5μV/°C (maximum)
  • Ultralow supply current: 495μA/amplifier
  • Wide supply voltage range: 3V to 10V
  • High speed performance: −3dB bandwidth: 105MHz
  • Slew rate: 160V/μs
  • 0.1% settling time: 35ns
  • Rail-to-rail outputs
  • Input common-mode range: -VS −0.1V to +VS −1V
  • Low noise: 5.9nV/√Hz at 100kHz; 0.6pA/√Hz at 100kHz
  • Low distortion: −102dBc /−116dBc HD2/HD3 at 100kHz
  • Low input bias current: 470nA (typical)
  • Dynamic power scaling
  • High speed turn-on time: 3μs (maximum) fully settled
  • Small packaging: 6-lead SC70, 6-lead SOT-23
  • ADA4805-2 Features
  • Low input offset voltage: 125µV (maximum)
  • Low input offset voltage drift
    • 0.2µV/°C (typical)
    • 1.5µV/°C (maximum)
  • Ultralow supply current: 500µA/amplifier
  • Fully specified at VS = 3V, 5V, ±5V
  • High speed performance: −3 dB bandwidth: 105 MHz
  • Slew rate: 160V/µs
  • Settling time to 0.1%: 35ns
  • Rail-to-rail outputs
  • Input common-mode range: -VS −0.1V to +VS −1V
  • Low noise: 5.9nV/√Hz at 100 kHz; 0.6pA/√Hz at 100kHz
  • Low distortion: −102dBc /−126dBc HD2/HD3 at 100kHz
  • Low input bias current: 470nA (typical)
  • Dynamic power scaling
  • Turn on time: 3µs (maximum) fully settled
  • Small packaging: 6-lead SC70, 6-lead SOT-23, and 8-lead MSOP

Typical Applications

Analog Devices Inc. ADA4805 High-Speed Amplifiers

Videos

Evaluation Boards

Amplifier Mezzanine Cards for ADC Drivers

Analog Devices Inc. Amplifier Mezzanine Cards for ADC Drivers

Analog-to-digital converter (ADC) drivers that evaluate the performance of amplifiers.

Learn Moreabout Analog Devices Inc. Amplifier Mezzanine Cards for ADC Drivers View Productsrelated to Analog Devices Inc. Amplifier Mezzanine Cards for ADC Drivers

Additional Resources

Can You Really Get ppm Accuracies from Op Amps?

There is a march toward 1ppm accurate systems, especially now that 1ppm linear ADCs are becoming common. This article presents op-amp accuracy limitations and how to choose the few op-amps that have a chance of 1 ppm accuracy.

Learn More
Published: 2015-01-22 | Updated: 2022-03-11