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Broad Portfolio of Medical Innovations

Analog Devices offers a broad portfolio of amplifiers, data converters, microcontrollers, MEMS, Low DropOut regulators (LDOs) and digital isolators all tuned for medical applications.

The AD9271 eight-channel ultrasound receiver is designed to dramatically increase the quality of results achievable in portable ultrasound equipment. By combining Low Noise Amplifier (LNA), Variable Gain Amplifier (VGA), Anti-Aliasing Filter (AAF) and 12-bit Analogue/Digital Converter (ADC) blocks on a single device, it can reduce by 50% the footprint required to implement signal-path functions.

Consuming just 115mW per channel at 10MSPS and 175mW per channel at 50MSPS, the AD9271 also uses 25% less power than competing solutions. It includes an integrated crosspoint switch, allowing numerous multi-channel configuration options that can be enabled with the CW (Continuous Wave) Doppler mode. This allows individual channels to be powered down to save battery life.

Each channel of the AD9271 features a variable gain range of 30dB, and the integrated ADC has 70dB SNR (Signal-to-Noise Ratio), matching performance levels previously available only in discrete solutions.



The AD9271 is designed to interface with the AD8339, a quad programmable I/Q demodulator with phase shifter that is well suited for use in CW Doppler ultrasound systems. The device replaces crosspoint switches and analogue delay lines, offering reductions in board space of up to 75% and up to 30% in power consumption. As a result, it allows increased channel density and the implementation of CW Doppler capabilities in portable equipment.

Also designed to reduce power consumption and system size, the AD7982 1MSPS, 18-bit ADC enables advanced patient-monitoring devices such as pocket-sized heart monitors. Consuming only 7mW of power, the device combines high accuracy, 95% less power, and 80% less board space than competing ADCs.



Providing up to 5kV isolation for medical applications according to IEC60601-1, the ADuM240x series of four-channel digital isolators is based on Analog Devices’ iCoupler technology. This combines high-speed CMOS and monolithic air core transformer technology as an alternative to optocoupler-type solutions.

The ADuM240x isolators eliminate the problems of nonlinearity and temperature and lifetime drift often associated with the use of optocouplers. In addition they run at one-sixth to one-tenth the power-per-channel of optics-based solutions. They provide four independent isolation channels in a variety of configurations and data rates.



Features: AD9271
•

Eight-channel integrated ultrasound receiver
• Integrates LNA, VGA, AAF and ADC
• Low power: 115mW/channel (10MSPS); 175mW/channel (50MSPS)
• Includes crosspoint switch for CW Doppler support
• Reduces signal path footprint by 50%
• 100-lead TQFP

Features: AD8339

• Quad programmable I/Q demodulator
• 16 phase select on each output
• 1° phase accuracy
• DC to 50MHz frequency range
• LFCSP package

Features: AD7982

• 18-bit, 1MSPS ADC with no missing codes
• Low power: 7.0mW at 1MSPS
• INL: ±1LSB typical, ±2LSB maximum
• Dynamic range: 99dB
• Single-supply 2.5V operation
• LFCSP or MSOP packaging

Features: ADuM240x

• Air-core transformer-based four-channel isolator
• 5kV isolation per IEC60601-1
• Linear and low drift
• Variety of channel configurations
• Up to 90Mbaud
• 16-lead SOIC

Applications

• Battery-powered equipment
• Medical instruments
• CW Ultrasound
• Heart monitors

For further information, including Datasheets for the AD7982, AD8339, AD9271 and ADuM2400/2401/2402, please click here.