- ADI’s AD8295 precision in amp front-end uses half the space of discrete solutions while providing the industry’s best common-mode rejection ratio of 80 dB to 8 kHz.
The AD8295 precision in amp front-end uses 50% less board space than competing amp solutions.

Norwood, MA (12/10/2008) - Analog Devices, Inc. (ADI), a world leader in amplifiers and semiconductors for signal processing applications, introduced today the AD8295, a highly integrated precision instrumentation amplifier front-end that uses 50 percent less board space than competing amplifier solutions for industrial and instrumentation applications. Incorporating a world-class instrumentation amplifier with two uncommitted operational amplifiers and two precision-trimmed matched resistors in a single 4-mm × 4-mm chip-scale package, the AD8295 in amp provides an integrated front end for industrial process controls, precision data acquisition systems, medical instrumentation equipment and Wheatstone bridge measurement applications. As part of a complete signal chain, the AD8295 in amp works well with a wide range of ADI’s analog-to-digital converters (ADCs), including the AD7656, AD7763 and AD7690, and multiplexers, such as ADI’s ADG1209.

The AD8295 in amp delivers the highest common-mode rejection (CMR) over frequency in its class. The CMR of competing devices typically falls off at 200 Hz, while the AD8295 maintains a minimum CMR of 80 dB to 8 kHz for all grades at G = 1. High CMR over frequency allows the AD8295 to reject wideband interference and line harmonics, greatly simplifying filter design. The on-board in amp is gain-programmable and uses a single resistor to set the gain from 1 to 1000, delivering 1 ppm/°C maximum gain drift (B grade), 8 nV/√Hz maximum input voltage noise at 1 kHz, and 0.25-μV p-p input noise (0.1 Hz to 10 Hz).

The AD8295 operates on both single and dual supplies and is well suited for applications where ±10 V input voltages are encountered. The entire chip (in amp and two op amps) uses only 2 mA of total current, allowing for more channel density and lower cost designs. The AD8295 components are arranged in a logical way so that typical application circuits, such as a differential ADC driver or an in amp with output filtering, have short routes and few vias. Unlike most chip-scale packages, the AD8295 does not have an exposed metal pad on the back of the part, freeing additional space for routing and vias.

Availability and Pricing

Temperature Range
Price Each Per 1000
December 2008
–40°C to +85°C
16-lead LFCSP

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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 100,000 customers, representing virtually all types of electronic equipment. Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices is included in the S&P 500 Index.

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Editor's Contact Information:

Bob Olson

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