ADC12D1600QML-SP - Interleave operation with multi devices in DES mode

Hiroshi Katsunaga

Mastermind 6480 points

Other Parts Discussed in Thread: ADC12D1600QML-SP

Hello,

My customer have some questions about ADC12D1600QML-SP.

[Q1]

Is it possible to operate interleave with multi ADC12D1600QML-SP devices in DES mode ?

[Q2]

If Q1 is possible, Can it use AutoSync Feature ?

I think the answer is No, it can not because AutoSync relies on the Sampling Clock arriving to each ADC at the same time.

Is my understanding correct ?

[Q3]

If Q1 and Q2 are possible, Can it use DCLK Reset Feature ?

I think the answer is Yes.

Is my understanding correct ?

Best Regards,

Hiroshi Katsunaga

over 8 years ago

0 Kirby Kruckmeyer96848 over 8 years ago

TI__Genius 17035 points

Hi Hiroshi,Do you know what sampling rate the customer wants?
Interleaving two ADCs in DES mode can work. Also, the autosync feature could be used.
The Aperature Delay (tAD) could be used adjust the sampling window of the second ADC.
Note, that will be a lot of fine tuning of things like gain and full scale to get the two ADCs to match for best performance.

0 Hiroshi Katsunaga over 8 years ago in reply to Kirby Kruckmeyer96848

Mastermind 6480 points

Hi Kirby,

Thank you for your fast response.

They said that they want to do the sampling rate highly as much as possible.

Their input signal information is as follows.

fc = several hundred MHz

BW = over 1GHz

I have additional 2 questions.

[Q1]

My understanding is as follows.

CLK+/- must arrive to each ADC at the same instant. (This is Autosync requirement)
The sampling window of the second ADC adjust the registers (0xC:Aperture Delay Coarse Adjust and 0xD:Aperture Delay Fine Adjust).
The routing for the RCLK does not have any stringent requirements because delay of RCLK can adjust the registers (0xE:Autosync).
For FCLK > 1GHz, it is recommended to drive RCLK externally.