AD9690-500 as a replacement for AD9652

Hi seung-gon,

AD9690 is optimized at minimum sampling clock at 300MSPS.

You may check the following products for your requirement. AD9683 is one channel, AD9250 is two channel. Both can support 250MSPS and JESD204B.

AD9683 Datasheet and Product Info | Analog Devices
AD9250 Datasheet and Product Info | Analog Devices


Best regards.
Peevee

Peevee,

Thank you for your suggestion.

I'm sorry I didn't mention exactly that the AD9652 design uses a variable sampling clock (240~ 260 MSPS) and its maximum sampling rate is 260MSPS.

The two ADCs you suggested seem to have many advantages. However, they only support 250MSPS, so it doesn't seem to satisfy the specifications I want to use.

Could you please suggest again with the following sampling rate?

Sampling rate: 240 ~ 260MSPS

Analog Input: 125~235 MHz (Carrier Freq: 180MHz) 

And I wonder if I can make the same condition as the AD9652 by adjusting the sampling rate to 520MSPS (260MSPS x 2) and the decimation ratio of the internal filter to 2 using the AD9690-1000.

Thanks,

Hi seung-gon,

Thank you for clarifying.

seung-gon said:

And I wonder if I can make the same condition as the AD9652 by adjusting the sampling rate to 520MSPS (260MSPS x 2) and the decimation ratio of the internal filter to 2 using the AD9690-1000.

Your understanding is correct, operating in AD9690 in DDC mode can achieve your desired sampling rate. 

You may refer to these articles for the discussion about the DDC:
What’s Up With Digital Downconverters—Part 1 | Analog Devices
What’s Up With Digital Downconverters Part 2 | Analog Devices

This article features AD9680 family's DDC where AD9690 belongs.

You may also explore the AD9680 using the virtual eval tool. This is also discussed in the article I shared.

Here is the link for the virtual eval tool: Virtual Eval | Analog Devices

Let us know if you have further questions regarding this.

Best regards,
Peevee