- Chopper stabilized ADA4051-2 op amp minimizes power use and prolongs battery life.
Chopper stabilized ADA4051-2 op amp minimizes power use and prolongs battery life.

Norwood, MA (07/30/2009) - Analog Devices, Inc. (ADI), a global leader in high-performance semiconductors for signal-processing applications and leading provider of amplifier technology, unveiled today a dual-channel, ultra-low-power, zero-drift operational amplifier that uses 30 percent less power than competing products. The compact ADA4051-2 is a chopper-stabilized op amp designed for portable and battery-powered instruments requiring high dc precision and measurement stability. These portable devices include gas analyzers, remote sensors, handheld medical devices and consumer gaming controllers.

The ADA4051-2 features a new chopper architecture with ADI’s patent pending ACFB (auto-correction feedback loop) ripple-suppression technology to provide low offset voltage of 2 microvolts (typ) and 15 microvolts (max). This architecture enables temperature drift suppression to 20 nanovolts per °C (typ) and eliminates 1/f noise. In addition, the ADA4051-2 provides rail-to-rail I/O, which helps provide high dynamic range (greater than 110-dB). The chopper architecture enables the device to achieve a high PSRR (power supply rejection ratio) of 135 db and CMRR (common mode rejection ratio) of 135 db (typ). The ADA4051-2 amplifier provides a 125-kHz gain-bandwidth product and draws only 17 microamps (max) which allows it to minimize power consumption and extend the operating time of battery-powered applications.

The ADA4051-2 CMOS (complementary metal-oxide semiconductor) high-precision op amp operates from a 1.8-V to 5.5-V single power supply and features rail-to-rail input and output swings to maximize ADC (analog-to-digital converter) dynamic input range. The device is compatible with most ADCs currently available, including ADI’s AD7942 14-bit, 250-kSPS PulSAR®, pseudo differential ADC and AD7788/89/90/91 ultra-low-power, Sigma Delta ADC family.

Availability and Pricing

Sample Availability
Temperature Range
Price Each Per 1,000
–40°C to +125°C
3mm x 3mm
8-pin LFSCP
–40°C to +150°C
3mm x 3mm
8-pin MSOP

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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.

PulSAR is a registered trademark of Analog Devices, Inc. All other trademarks are the property of their respective owners.

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Editor's Contact Information:

Bob Olson

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