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ADC driver for AD9255

Question asked by piller on Feb 7, 2013
Latest reply on Feb 19, 2013 by piller

I'm planning to use the AD9255 single 14 bit ADC with DC coupled input signals in the dc - 20 MHz range.

Because of the DC coupled requirement I am looking at ADC driver amplifiers instead of a transformer.

 

The AD9255 web page recommends the ADA4937-2 and ADA 4938-2 parts.  The AD9255 data sheet shows the ADA4938-2 in figure 66.  However, these ADC drivers are dual parts and I don't understand why these are recommended, the AD9255 is a single ADC.  Is it a typo or am I missing something?

 

Can I just substitute the the ADA4937 in place of the ADA4938 as shown in figure 66?  If so that may be the driver and circuit that I need. 

 

Thanks.

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