AS3422

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Class AB
Output Type:	Headphones, 2-Channel (Stereo)
Max Output Power x Channels @ Load:	--
Voltage - Supply:	1 V ~ 1.8 V
Features:	Depop, Differential Inputs, I²C, Input Multiplexer, Microphone, Mute, Short-Circuit Protection, Volume Control
Mounting Type:	Surface Mount
Operating Temperature:	-20°C ~ 85°C (TA)
Supplier Device Package:	32-QFN (5x5)
Package / Case:	32-VFQFN Exposed Pad

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

---

AS3422 Application Field and Working Principle

Introduction

The AS3422 is a two channel, low noise, low power operational amplifier designed to drive audio inputs and outputs. The AS3422 is capable of optimally amplifying low-level signals such as those found in mobile audio applications, and is also suitable for powering portable speaker systems. Compensated for use in single supplies, reactance amplifier configurations, and low distortion Class D amplifier applications, AS3422 provides a high-performance solution for the audio enthusiast.

Applications of AS3422

The AS3422 is designed to be used in single supply and low supply voltage operations. This makes it ideal for battery operated and mobile audio applications that require crisp and low distortion sound. The low power draw of the IC reduces power consumption and extends the battery life of mobile audio devices. Its low input voltage noise and high common-mode rejection ratio make it ideal for signal magnification applications, such as microphone preamplifiers. AS3422 can also be integrated into active filters, geared to particular needs such as bass boosting and signal rounding. The device is also suitable for analog signal processing, such as mixing and level control. Auto Volume Control (AVC) functions can also be implemented, providing flexibility in automatic gain control when audio signals are identified as too loud or too quiet for a certain device. In addition, AS3422 can be used in low distortion Class D amplifier applications, where its low power operation is suitable for direct-drive power amplifiers. The IC is also compensated for operation in surge circuits, providing superior sound quality and static bass performance.

Working Principle of AS3422

The basic working principle of a two-channel operational amplifier, such as the AS3422, is the same as any other operational amplifier. An input signal to the inverting (-) input of the amplifier is connected to one of the amplifier’s output ports. The non-inverting (+) input is then connected to a reference voltage, such as ground, or a reference voltage (VREF). The output of the amplifier is then obtained at the output port of the amplifier.The AS3422 also includes a differential gain stage with an output offset. This is an important feature for audio applications, in that it allows for a fixed DC level shift to be achieved without the need for further external components. This ensures that audio signals are amplified without any distortion or signal losses.The working principle of the AS3422’s differential gain stage can be represented using the following equation:Aout = N * (V In - Voffset)Where:Aout is the output of the gain stage,N is a gain constant,Vin is the input voltage to the amplifier,Voffset is the output offset set by the amplifier. Once the amplifier is configured, Aout will be equal to the plus or minus value at the output port, relative to the reference voltage.

Conclusion

The AS3422 is an excellent choice of amplifier IC for mobile audio applications due to its low power operation, low noise operation, differential gain stage and output offset features. Its low power operation makes it an ideal choice for battery operated and mobile audio applications, and its high common-mode rejection ratio makes it suitable for low distortion Class D amplifier applications. The AS3422 also provides superior sound quality and static bass performance for powered speakers and audio devices.

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

Part Number	Manufacturer	Price	Quantity	Description