ADA4806-1 Low-Power, Multimode, Rail-to-Rail Ampli

By Analog Devices Inc 49

ADA4806-1 Low-Power, Multimode, Rail-to-Rail Ampli

Analog Devices' ADA4806-1 is a high-speed, voltage feedback, rail-to-rail output, single operational amplifier with three power modes: full power mode, sleep mode, and shutdown mode. In full power mode, this amplifier provides a wide bandwidth of 105 MHz at a gain of +1, a fast slew rate 160 V/μs, and excellent DC precision with a low input offset voltage of 125 μV (maximum) and an input offset voltage drift of 1.5 μV/°C (maximum), while consuming only 500 μA of quiescent current. Despite being a low-power amplifier, the ADA4806-1 provides excellent overall performance, making it ideal for low-power, high-resolution data conversion systems.

For data conversion applications where minimizing power dissipation is paramount, the ADA4806-1 offers a method to reduce power by dynamically scaling the quiescent power of the ADC driver with the sampling rate of the system by switching the amplifier to a lower power mode between samples.

Sleep mode reduces the amplifier quiescent current to 74 μA and provides a fast turn-on time of only 0.45 μs, enabling the use of dynamic power scaling for sample rates approaching 2 MSPS. For additional power savings at lower sample rates, the shutdown mode further reduces the quiescent current to only 2.9 μA.

The ADA4806-1 operates over a wide range of supply voltages and is fully specified at supplies of 3 V, 5 V, and ±5 V. This amplifier is available in a compact, 8-lead SOT-23 package and is rated to operate over the industrial temperature range of -40°C to 125°C.

Features
  • Ultra-low supply current
    • Full power mode: 500 μA
    • Sleep mode: 74 μA
    • Shutdown mode: 2.9 μA
  • Fast turn-on time for dynamic power scaling ADC drivers
    • 0.45 μs from sleep mode
    • 1.5 μs from shutdown mode
  • High-speed performance
    • -3dB bandwidth: 105 MHz
    • Slew rate: 160 V/μs
    • 0.1% settling time: 35 ns
  • Low-input offset voltage and drift:
    • 10/125 μV (typical / max)
    • 0.2/1.5 μV/°C (typical / max)
  • Low noise
    • 5.9 nV/√Hz at 100 kHz
    • 0.6 pA/Hz at 100 kHz
  • Low distortion (HD2/HD3)
    • -114/-135 dBc at 20 kHz
    • -102/-126 dBc at 100 kHz
  • Wide supply range: 2.7 V to 10 V
  • Small package: 8-lead SOT-23
Applications
  • Portable and battery-powered instruments and systems
  • High channel density data acquisition systems
  • Precision analog-to-digital converter (ADC) drivers
  • Voltage reference buffers
  • Portable points of sale terminals
  • Active RFID readers

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