Analog Devices Introduces 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.
July 2, 2009 -- NORWOOD, Mass.--(EON: Enhanced Online News)-- 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.
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/√Hz 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.
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 1,000 Packaging
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 throughout the industry 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.