Chopper Stabilized Op Amp prolongs battery life.

Press Release Summary:

Suitable for portable and battery-powered instruments, dual-channel Model ADA4051-2 features Auto-Correction Feedback Loop ripple-suppression technology to provide low offset voltage of 2-15 µV. Rail-to-rail I/O helps provide dynamic range greater than 110 dB, while chopper architecture enables device to achieve PSRR and CMRR of 135 dB. Operating from 1.8-5.5 V single power supply, zero-drift op amp draws 17 µA and provides 125 kHz gain bandwidth.

Original Press Release:

Analog Devices Unveils Lowest-Power, Zero-Drift OP AMP

- 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
Product	  Sample Availability  Temperature Range  Price Each Per 1,000   Packaging 
ADA4051-2 Now -40°C to +125°C $1.50 3mm x 3mm 8-pin LFSCP
ADA4051-2 Now -40°C to +150°C $1.50 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 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.

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