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Analog Devices (ADI), a provider of high-performance semiconductors and amplifier technology, has unveiled a dual-channel, ultra-low-power, zero-drift operational amplifier.

The compact ADA4051-2 is a chopper-stabilised operational amplifier designed for portable and battery-powered instruments requiring high DC precision and measurement stability.

These portable devices include gas analysers, remote sensors, handheld medical devices and consumer gaming controllers.

The ADA4051-2 features a new chopper architecture with ADI’s patent-pending auto-correction feedback-loop (ACFB) ripple-suppression technology to provide a low offset voltage of two microvolts (typical) and 15 microvolts (maximum).

This architecture enables temperature drift suppression to 20 nanovolts/C (typical) and eliminates 1/f noise.

In addition, the ADA4051-2 provides rail-to-rail input/output (I/O), which helps to provide a high dynamic range.

The chopper architecture enables the device to achieve a high power supply rejection ratio (PSRR) of 135dB and a common mode rejection ratio (CMRR) of 135dB (typical).

The ADA4051-2 amplifier provides a 125kHz gain-bandwidth product and draws only 17 microamps (maximum), which allows it to minimise power consumption and extend the operating time of battery-powered applications.

The ADA4051-2 complementary metal-oxide semiconductor (CMOS) high-precision operational amplifier operates from a 1.8V to 5.5V single power supply and features rail-to-rail input and output swings to maximise the analogue-to-digital-converter (ADC) dynamic input range.

The device is compatible with ADI’s AD7942 14-bit, 250kSPS Pulsar pseudo differential ADC and the AD7788/89/90/91 ultra-low-power Sigma Delta ADC family.

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