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ADC future trends

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Ardni

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Hi,
We are currently working on a project where we have an ADC (AD9640) which receives a signal from an RF board. We need to automatically control the gain in the RF section by changing the configuration of the attenuators as the received signal fluctuates.

We have an FPGA controlling the ADC and are unsure whether to analyse the receiving signal to calculate the energy or to use the built in magnitude dectetor in the ADC. (4 output pins give an idea of the rxed power in db's of the rxed signal). It is much easier to use this rather than calculate the actual power in VHDL. But the problem we have is that we want to write firmware that does not have to be modified much if any of the components were to change as we want to reuse the firmware for other projects.

What I am interested in knowing is, do most ADC have this feature built in and in the future is it something which will be employed in most ADC´s. In other words is it worth it to go the extra effort of doing the automatic gain control based on analysing the rxed signal or would the design be relitively future proof if we use the features provided by analog devices (which is much easier to implement)?

Many thanks for any help.
 
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