Amplifier ICs
Volume 8, Issue 9 YOUR SEMICONDUCTOR SOLUTIONS RESOURCE

High Speed, Precision Voltage Feedback Amplifier Is Ideal for 16-Bit to 18-Bit Precision Instrumentation

The ADA4898-1 is an ultralow noise and distortion, unity gain stable, voltage feedback operational amplifier that is ideal for use in 16-bit and 18-bit systems with power supplies from ±5 V to ±16 V. The device features a patented circuit architecture that addresses the fundamental performance trade-offs between noise and distortion inherent in traditional input stages. The ADA4898 is the latest operational amplifier to use the common-mode linearized input stage pioneered by ADI with the AD8099 operational amplifier. This feature offers designers an optimal combination of low distortion, low broadband noise, unprecedented low 1/f noise, and high speed. The ADA4898-1 operates over the extended temperature range of –40°C to +105°C and is available in an 8-lead SOIC featuring an exposed metal pad on the underside. It can be connected to the negative supply plane to improve heat transfer.

ADA4898-1

The ADA4898-1 is designed to work with Analog Devices' precision data converters, including the AD7631 and AD7634. For more information on ADI's broad portfolio of low noise amplifiers, please visit www.analog.com/lownoiseamps.

ADA4898-1 Features

  • Noise
    • 0.9 nV/√Hz
    • 2.4 pA/√Hz
    • 1.2 nV/√Hz @ 10 Hz
  • Distortion: –93 dBc at 500 kHz
  • Supply voltage: ±5 V to ±16 V
  • Bandwidth: –3 dB @ 65 MHz (G = 1)
  • Slew rate: 55 V/µs
  • Input offset voltage: 150 µV max
  • Input offset voltage drift: 1 µV/°C
  • Input bias current: –0.1 µA
  • Input bias current drift: 2 nA/°C
  • Unity gain stable
  • Supply current: 8 mA
  • Power-down feature

Please click here for the Latest Precision, Low Noise Operational Amplifiers selection table.

Noise Optimization in Sensor Signal Conditioning Circuits

Part I of this online seminar covers the types, sources, characteristics, and analysis techniques of noise, and introduces a low noise design process. To access this seminar, visit www.analog.com/onlineseminars/noise1.

Part II will walk you through the entire low noise design process and show how to manage noise to meet required signal chain performance objectives. Design dos and don'ts, as well as a number of circuit optimization techniques, will be presented. To access this seminar, visit www.analog.com/onlineseminars/noise2.

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