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Op amp with unity-gain stability zips at 1GHz

Posted: 30 Aug 2004 ?? ?Print Version ?Bookmark and Share

Keywords:analog devices? adi? op amp? ad8045?

Analog Devices Inc. has introduced an op amp that combines easy-to-use voltage-feedback architecture, unity-gain stability, and pin-out optimized for high-performance systems. This unique set of features, combined with 1GHz speed, low noise and low distortion, simplifies design and makes the AD8045 ideal for many high-speed applications including medical instrumentation, ATE and data-acquisition systems.

The AD8045 is a unity-gain stable, 1GHz voltage-feedback amplifier that can slew at 1,350V/?s and settle to 0.1 percent in 7.5ns. With spurious-free dynamic range of 101dBc at 5MHz and low noise of 3nV/rt Hz, the amplifier is well-suited for systems that demand high resolution at high speeds. In addition to these desirable ac specifications, the AD8045 has superior dc characteristics with a voltage offset of 200?V and input bias current of 2?A. The amplifier can operate on supply voltages between 3.3V and 12V.

The AD8045 features an advanced pin-out to enhance performance and stability over traditional amplifier pin-outs. The AD8045 uses this new standard 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.

The AD8045 is now available in full production quantities. The part is specified over the extended industrial temperature range (-40C to 125C) and is available in a 3-by-3mm LFCSP and an 8-lead SOIC. Both packages feature an exposed paddle that provides better thermal characteristics. In either packaging option, the device is priced at $1.39 per unit in 1,000-piece quantities.

- Paul O'Shea


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