Instrumentation Amp enables power efficient medical devices.

Press Release Summary:

Measuring 1.6 x 2.0 mm, AD8235 instrument amplifier draws 40 mA and operates on 1.8-5.5 V power supplies, with common-mode input-voltage range of 4 and 1.4 V on 5 and 1.8 V supplies, respectively. Common-mode rejection ratio of 86 dB eliminates common-mode interference. Also, unit features 6 nA shutdown current and 40 pA bias current. Low power consumption makes device suitable for use in home ECG monitors, infusion pumps, and activity-monitoring medical devices.

Original Press Release:

Analog Devices Unveils Industry's Smallest, Lowest Power Instrumentation Amplifier

- ADI's AD8235 in-amp enables palm-sized medical devices and activity-monitoring medical products with 50 percent less power consumption than competitive offerings

NORWOOD, Mass. - Analog Devices, Inc. (ADI), a global leader in high-performance semiconductors for signal processing applications and leading provider of amplifier technology, introduced today the industry's smallest and lowest power instrumentation amplifier (in-amp). Smaller than the tip of a pencil, the miniscule size of the AD8235 in-amp, combined with its ultra-low power consumption, is effective for power-efficient and portable, lightweight medical devices and consumer-health products, including home-use ECG (electrocardiogram) monitors, infusion pumps and activity-monitoring medical devices. With 50% less power consumption than competitive offerings, the in-amp can enable designs to provide longer battery life. This performance is key for compact, wearable home-based medical devices that improve patient comfort while providing doctors with continuous and reliable patient monitoring.

The AD8235 measures 1.6 mm x 2.0 mm-one-third the size of competing instrumentation amplifiers. Operating on 1.8-V (min) and 5.5-V (max) power supplies and drawing only 40 microamps (max), the AD8235 is suitable for other low-power applications, including consumer-fitness products and industrial pressure and low-side current-sensing measurement equipment. These applications also benefit from the in-amp's 6 nanoamp shutdown current and 40 picoamp bias current.

The AD8235's wide power-supply range eliminates the need for extra supplies. The in-amp's wide common-mode input-voltage range (4V and 1.4V on 5V and 1.8V supplies respectively) is important for the low-voltage operation required by many battery-powered portable applications. A high common-mode rejection ratio (CMRR) of 86 dB (gain=5) effectively eliminates common-mode interference.

Pricing, Availability and Complementary Products

Product Availability Price Each Per 1,000 Packaging
AD8235 NOW $1.59 each 9-lead WLCSP
AD8236 NOW 0.99 each 8-lead MSOP

The AD8235 in-amp is available now in full-volume production and is compatible with a number of ADI's digital isolators and amplifiers, including the ADUM2400 quad-channel digital isolator, AD8603 precision CMOS operational amplifier, AD8607 precision amplifier and the AD8609 precision quad amplifier. It comes in standard bumped-die packaging in a reel format to simplify manufacture.

For more information, visit For product information on amplifiers, visit

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 technologies, 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 for 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.

Analog Devices, Inc. Corporate Communications Department, Three Technology Way, Norwood, MA 02062


Analog Devices Inc.

Bob Olson, 781-937-1666

Source: Analog Devices

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