Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

AD684AQ Application Field and Working Principle

The AD684AQ is an instrumentation amplifier and buffer amplifier from Analog Devices. It is a linear amplifier that is a versatile choice for amplifying small differential signals. It has an output common-mode voltage of +/-6 V and is designed for applications including portable data acquisition and in-circuit signal conditioning. It is available in a 16-lead dual-in-line package.

Operational Description

The AD684AQ is an integrated circuit with two differential amplifiers and two unity-gain buffers. The two differential amplifiers are configured as an instrumentation amplifier and are used to amplify the signal. The two buffers are used to isolate the amplifiers from the load, allowing for higher signal-to-noise ratio with better linearity. The AD684AQ has an adjustable gain of up to 10 and a maximum output current of 20mA.

Signals are applied to the input pins of the amplifier. A single external resistor is used to adjust the gain of the amplifier. The differential input stage amplifies the signal and then the signal is conditioned by the buffer stages before being sent to the output pins.The output signal is then the amplified input signal with gain adjustments for resistive loading applications.

Benefits

The AD684AQ has many advantages when compared to typical instrumentation amplifiers. First, it offers improved noise performance with a signal-to-noise ratio of 67 dB. This helps to increase the accuracy of the signal. Secondly, it has a wide input range with a minimum common-mode voltage of -3 V and a maximum common-mode voltage of +3 V. This ensures that the AD684AQ can be used in a variety of applications. Finally, the AD684AQ has excellent linearity with a maximum of 0.3 % non-linearity.

Applications

Due to its flexibility and performance, the AD684AQ can be used in a variety of applications. It is ideal for small-signal conditioning and in-circuit signal conditioning. It is commonly used in portable data acquisition, medical instrumentation, industrial systems, and monitoring & control systems. The AD684AQ can also be used in motor control applications.

Conclusion

The AD684AQ is a linear amplifier that is ideal for amplifying small differential signals. It has an adjustable gain of up to 10 and a maximum output current of 20mA. It offers improved noise performance with a signal-to-noise ratio of 67 dB and excellent linearity with a maximum of 0.3 % non-linearity. It is commonly used in portable data acquisition, medical instrumentation, industrial systems, and monitoring & control systems.

The specific data is subject to PDF, and the above content is for reference