What are the features of the HMC472A?

In addition to the features of the HMC472A step attenuator that Analog Devices exhibited at the Microwave Expo 2015, which can be checked on the manufacturer's website, there is actually characteristic data that you should check on the data sheet.

The main features of HMC472A are as follows.

• Band: DC to 3.8GHz
• Attenuation variable in 0.5dB steps from 0 to 31.5dB
• V1-V6 pins control internal attenuator
• Control line is TTL/CMOS compatible
• Step error: ±0.25dB (typical)
• Operates from a single +5V supply

And so on.

Please check the characteristics of this product on the data sheet.

1. Stable and low return loss in all bands

It is -19dB or less in the band above 100MHz.

2. Excellent attenuation flatness in all bands

At maximum attenuation (31.5dB), the error increases slightly in the 200MHz to 800MHz range, but is extremely low in other bands.

3. Less error with respect to set values in the band of 100MHz or more

This graph shows the attenuation error when switching the range from 0 to 31.5 dB in 0.5 dB steps. It is like the INL of ADC/DAC, and you can see the error for all setting values.

HMC472A is a step attenuator that shows good characteristics over the entire band!!

Exhibit at Microwave Exhibition 2015

At Microwave Exhibition 2015, we exhibited a demo in which a step attenuator (HMC472A) is used to attenuate the signal output from a signal generator that achieves broadband, high output, and low cost by limiting its functions. I did.

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