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ADI unveils low-power, zero-drift op amp

Norwood, Mass.—Analog Devices Inc. (ADI) has unveiled a dual-channel, ultra-low-power, zero-drift operational amplifier that it claims 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 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 dynamic input range.

Pricing: $1.50 each in 1,000K quantities.
Availability: Sampling.

Datasheet: click here.

Analog Devices, www.analog.com

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