AD822AR

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Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

The AD822AR is a low-power, low-noise, low-distortion CMOS operational amplifier that can be used in a wide range of precision applications. The AD822AR is a single-supply amplifier with a supply range from 1.8 V to 5.5 V, allowing it to be used with either one or two power supplies. The single-supply operation eliminates the need for dual supplies and reduces circuit complexity and power consumption.

The AD822AR is available in an 8-lead MSOP package and is the ideal op-amp for low-power applications such as portable instrumentation, battery-powered gear, data converters and audio. The device can be operated from dual or single supplies and is capable of providing high performance at very low power consumption. The AD822AR also features low noise and low distortion, making it suitable for high quality audio applications.

Features:

• Operating supply range: 1.8 V to 5.5 V
• High performance at very low power consumption
• Low noise: 1.25 nV/√Hz
• Low distortion: 0.0005% at 1 kHz
• Extremely low input bias current: 0.5 pA
• High slew rate: 5 V/μs
• Low output impedance: 0.15 Ω

Applications:

• Low-power portable instrumentation
• Data converters
• Audio
• Battery-powered gear
• Sensor and actuator systems

Working Principle:

The AD822AR is a low-power, low-noise, low-distortion CMOS operational amplifier (op-amp). It consists of two differential amplifiers that are connected in series to form a unity gain circuit. The input stage amplifies the input signal and the second stage provides the gain. This configuration offers high-quality amplification of the input signal with low noise and low distortion. The AD822AR is capable of operating from a single or dual power supply and has low input bias currents, making it suitable for use in portable instrumentation and battery-powered gear.

The AD822AR operates on a single 1.8 V to 5.5 V power supply, allowing it to be used with either five- or three-volt power sources. The output swing is limited by the supply voltage, and the maximum output voltage swing is 1.8 V and 5.5 V. The amplifier can provide a gain of up to 20 dB, and the gain can be adjusted using an external resistor network. The AD822AR features low-noise operation, with a noise rate of 1.25 nV/√Hz, and a low distortion of 0.0005% at 1 kHz.

The AD822AR is designed for precision applications, and the device offers excellent input common-mode rejection and power supply rejection. It is capable of driving up to 20 mA of output current, so it can be used for low-power applications. The low-impedance output also reduces load current when compared to standard operational amplifiers.

Overall, the AD822AR from Analog Devices combines low power consumption with high performance to make it an excellent choice for precision applications. The device is available in an 8-lead MSOP package and offers a wide range of features and benefits, making it the ideal op-amp for low-power applications.

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