Low noise op-amp

Analog Devices has introduced a new operational amplifier that, it claims, minimises two fundamental error sources in amplifier design: voltage noise and harmonic distortion.

The AD8099 features a patent-pending architecture that addresses fundamental performance trade-offs inherent in traditional differential input stages. This enables the AD8099 to deliver low voltage noise (0.95 nV/rt Hz) and low distortion (-90 dB at 10 MHz).

In addition, the device provides a 1600-V/us slew rate and a 5-GHz gain bandwidth product at gain of 10. The AD8099 can slew at rates of 600 V/us, down to a gain of 2.

The AD8099 is also the first operational amplifier to use a new pin-out to reduce the mutual inductance – and resulting distortion products – caused by the coupling between positive input and negative supply. Additionally, the amplifier provides two output pins to reduce feedback parasitics. This simplifies board layout and increases the stability of the amplifier.

Analog Devices claim that the new op-amp is ideal for use in applications that require the highest degree of accuracy, such as radar collision avoidance systems, medical ultrasound signal processing, and precision instrumentation.

Sampling now, the device and will be in full production in November 2003. It is rated to work over an extended industrial temperature range of – 40 degrees C to +125 degrees C. It is available in two packaging options: a tiny 3 mm x 3 mm LFCSP, which reduces board space requirements and improves thermal characteristics, and the traditional low profile 8-lead SOIC (small outline integrated circuit).

The devices are priced at $1.98 per unit in 1,000-piece quantities.

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