HMC473MS8ETR RF/IF and RFID

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Attenuators are electronic components used to control signal strength, typically in radio-frequency systems. The HMC473MS8ETR is a 6-bit digital step attenuator from Analog Devices. It offers low spurious performance combined with high linearity, making it suitable for a wide range of radio-frequency applications such as cellular base station radios, test and measurement equipment and power amplifiers.

The device consists of a monolithic CMOS integrated circuit. It has an adjustable output step size of 0.25dB. It offers low power consumption and can work with a supply voltage range from 0.7 to 3.3V. The signal input and output ports are differential (balanced). It has a maximum output attenuation of 30dB and a maximum input attenuation of 48dB.

The HMC473MS8ETR is well-suited for use in base station and waveguide radio systems. It’s low power consumption makes it ideal for applications where low power dissipation is important. Its high linearity makes it suitable for testing and measurement equipment as well as power amplifiers.

The working principle is fairly simple. The attenuator consists of a series of resistive ladders that are connected in parallel between the input and the output of the device. The number and value of the resistors determines the amount of attenuation. By adjusting the resistance of the ladders, the attenuation can be set to any desired level.

The ladders are adjusted by applying a digital control code to the device. This digital code is then converted into analog voltages applied to the resistive ladders. Depending on the code, the voltage will be applied in different combinations to the resistors, thus changing the resistance. This in turn affects the attenuation.

The HMC473MS8ETR is an excellent choice for both base station radios and mobile radio applications. Its high linearity and low power consumption make it suitable for use in receiver and transmitter systems. It can also be used for power amplifiers and test and measurement equipment.

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