RF sampling ADC for Integrated 90deg Hybrid Balanced Receiver

Hi,

It would be best to provide some sample rate, resolution and bandwidth requirements needed for your application.

I see the attachment, but this could be used with many ADCs. 

The ADC12DJ5200RF or the ADC12QJ1600 families come to mind.

There is also a parametric table on TI.com that can help down select from many ADC bases on some simple requirements. 

Regards,

Rob

can you suggest which can handle The RF output swing is ±1.8 V into 50 Ω. sapling rate 300 MSPS to 1000 MSPS is acceptable

Hi Sreevalsen,

I would try the ADC12D1000 or D1600. Here is a link to the datasheet.

https://www.ti.com/lit/ds/symlink/adc12d1600rf.pdf?ts=1639595994485&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FADC12D1600RF%253Futm_source%253Dgoogle%2526utm_medium%253Dcpc%2526utm_campaign%253Dasc-null-null-GPN_EN-cpc-pf-google-wwe%2526utm_content%253DADC12D1600RF%2526ds_k%253DADC12D1600RF%2526DCM%253Dyes%2526gclid%253DEAIaIQobChMI3seqg8Pm9AIVChXUAR2yfgetEAAYASAAEgJC5fD_BwE%2526gclsrc%253Daw.ds

Regards,

Rob

it work only till -.5 v ,as i understand .while the requirement is till -1.8v. in positive swing it will work till 2V.can you suggest something work for both swing

thank you so much for the fast response.Yes i need to dc couple the analog input.

Hi Sreevalsen,

Okay, if you need to DC couple, then is there an amplifier being used on the previous stage to drive the ADC?

If you can sketch out your signal chain and forward to me, that might make it more clear for me.

Thanks,

Rob

 I have to measure the dc shift as well as high frequency component of  analog signal.my signal flow is Integrated 90deg Hybrid Balanced Receiver followed by amplifier (in case required for Filtering) followed by adc followed by fpga

Hi Sreevalsen,

What amplifier is connected to the ADC? The common mode voltages of each will need to be set accordingly in order for this to work correctly.

Regards,

Rob

1. As you can seen from the data sheet input here there are 2 single ended input are there each in my case have band width of 200mhz.

2. The signal range here is -1.8 to +1.8 @50 ohm

3.there should be a low pass filter to remove frequency above 220 mhz.

4. I am looking for a Two channel ADC with sampling rate of 500 msps. with 12 bit resolution.

5 can you suggest a signal flow along with component for converting this analog signal ,including dc value to digital signal.?

Hi Sreevalsen,

I didn't see an amplifier datasheet attached. Can you please provide the PN of the amplifier you plan to use?

Thx,

Rob

www.optoplex.com/.../Optoplex Integrated 90deg Balanced Receiver Brochure_Rev 2021.pdf

I  have not yet selected amplifier

Thank you Mr.Reeder.could you suggest any network attenuation pad in this bandwidth?