Series:	--
Packaging:	Bulk
Part Status:	Active
Attenuation Value:	30dB
Frequency Range:	0Hz ~ 13GHz
Power (Watts):	2W
Impedance:	50 Ohms
Package / Case:	N-Type In-Line Module

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Introduction

Attenuators are devices that are used to reduce the magnitude of an electrical or electronic signal. They are used to provide a controlled amount of signal reduction without introducing distortion. The AT-430 is one such type of attenuator. This article will discuss the AT-430 application field and working principle.

Application Field

The AT-430 is a miniaturized precision attenuator with an extremely small outline, making it ideal for use in a variety of applications including audio and video, telecommunications and instrumentation. It has a maximum operating bandwidth of up to 200MHz and is ideal for applications such as antenna matching, baseband equalization, cable equalization, and output level control.The AT-430 is also well suited for handheld and portable devices, providing an effective solution when limited space abounds. It is also suited for medical equipment applications such as high-definition ultrasound imaging, since it is extremely low in power consumption and offers an excellent signal-to-noise ratio.

Working Principle

The AT-430 operates on a passive, non-amplifying circuit. It consists of two separate sections: an input section and an attenuation section. The input section contains an integrated RF input circuit that retains the input signal’s phase and amplitude level. The attenuation section consists of a number of resistors in series. The resistors are commonly known as “surface mount resistors”, or SMR, and they are typically arranged in a bridge circuit configuration.When the input signal is passed through the bridge circuit, the up and down resistor voltages cause a transfer of power to the output terminal. This transfer in power reduces the output voltage, resulting in signal attenuation. The amount of attenuation can be precisely controlled by changing the resistor values.

Conclusion

The AT-430 is an excellent choice when a low-profile attenuator is required in applications such as medical imaging, telecommunications, instrumentation, and audio and video. It provides precise control of signal attenuation without introducing distortion. The compact size, low power consumption and high signal-to-noise ratio make the AT-430 an ideal choice for high-density electronic components.

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