Dual Ultra-Low-Noise Amplifier features selectable gain.

Press Release Summary:

Available with active impedance matching, Model AD8432 is suited for high channel count communications and medical applications that require up to 200 MHz of bandwidth. Single-ended-input amplifier operates on single 5 V supply and provides differential output optimized to drive I/Q demodulators and phase shifters. Housed in 4 x 4 mm package, amplifier operates from -40 to +85°C and offers selectable gains of 4, 8, 12, or 16 via pin-strapping options.

Original Press Release:

Ultra-Low-Noise Amplifier Features Selectable Gain and Broad Bandwidth

- ADI's AD8432 dual ultra-low-noise amplifier is designed for high channel count, wide-bandwidth communications and medical applications.

Norwood, MA (07/02/2009) - Analog Devices, Inc. (ADI), a global leader in high-performance semiconductors for signal processing applications and leading provider of amplifier technology, introduced today the only dual, ultra-low-noise amplifier available with selectable gain and active impedance matching. The AD8432 amplifier provides superior noise performance, lower per-channel cost and nearly three times the bandwidth of competing products.

The combination of selectable gain and low noise enables the amplifier to detect and resolve low-level input signals. Active impedance matching reduces signal reflection by matching signal-source and amplifier-input impedances without compromising input-noise performance. By using the pin-strapping options, designers can select four gains: G = 4, 8, 12 and 16. At a gain of four, the amplifier's 200-MHz bandwidth is nearly three times that of competing devices, while a 0.85-nV/rtHz input referred voltage noise figure offers best-in-class noise performance.

ADI designed the AD8432 for communications-infrastructure and medical-ultrasound applications that require up to 200 MHz of bandwidth combined with a high channel count and variable gains. The common die and symmetrical design ensure precise phase matching between channels.

A single-ended-input amplifier, the AD8432 operates on a single 5-V supply and provides a differential output optimized to drive ADI's AD8333 and AD8339 I/Q demodulators and phase shifters in medical ultrasound CW Doppler applications as well as a wide range of ADCs (analog-to-digital converters), such as ADI's AD7679 18-bit, 570-kSPS (kilo samples per second) PulSAR® converter and AD7952 14-bit, 1-MSPS (mega samples per second) PulSAR converter.

The AD8432 packaging features an exposed paddle that provides a low thermal-resistance path to the PCB (printed circuit board), which enables more efficient heat transfer and increases reliability.

Availability and Pricing
Product       Sample Availability       Temperature Range     Price Each per 1000     Packaging
AD8432 Now -40°C to +85°C $1.99 4mm x 4mm 24-Lead LFCSP

For more information, visit www.analog.com/pr/AD8432. For more product information on amplifiers, visit http://www.analog.com/amplifiers.

About Analog Devices

Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Celebrating over 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker "ADI" and is included in the S&P 500 Index.

PulSAR is a registered trademark of Analog Devices, Inc.

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