Data acquisition with 200 MSPS ADC

Vivek Gujari

Other Parts Discussed in Thread: TIDA-00093, ADS4449, ADS4149, CDCE72010

Hi everyone,

My project is to design a data acquisition system for a photo multiplier tube (PMT). The PMT is connected to a pre amplifier which converts the current output of the PMT to a raw analog voltage.

I am in the process of implementing the front end signal conditioning design of the system. I have decided to choose 200 MSPS ADC for this application. I am conditioning the signal in a way so that the conditioned signal satisfies the input bandwidth and the input voltage range of the ADC.

Question -

1. How do I verify the front end design? For example, when the design is implemented in a PCB for the 200 MSPS ADC, do I have to interface the ADC to an FPGA so that I can record the outputs of the ADC in a memory?

2. May I know the design flow to implement a data acquisition system?

Thank you!

over 7 years ago

0 Jim Brinkhurst1 over 7 years ago

TI__Mastermind 44680 points

Hi Vivek

Here are a couple of different TI Designs which discuss front end circuitry and an ADC solution similar to what you are describing:

http://www.ti.com/tool/TIDA-00092

http://www.ti.com/tool/TIDA-00093

High speed ADCs generally need an FPGA to perform data capture and processing. A board like the TSW1405EVM or TSW1400EVM is a good example for what the FPGA solution needs to look like. All design information for these boards is available in their respective web folders.

Best regards,

Jim B

0 Vivek Gujari over 7 years ago in reply to Jim Brinkhurst1

Prodigy 185 points

Hi Jim,

Thank you for your valuable response. This is exactly what I was looking for!

I will let you know if I need any help.

Thank you.

0 Vivek Gujari over 7 years ago in reply to Jim Brinkhurst1

Prodigy 185 points

Hi Jim,

Which will be the best PCB tool to implement the TIDA-00093 design?

Thank you.

0 Jim Brinkhurst1 over 7 years ago in reply to Vivek Gujari

TI__Mastermind 44680 points

Hi Vivek

That TI design circuit board was generated using Cadence Allegro Design Entry Capture schematic capture and Cadence Allegro PCB Design layout tools.

https://www.cadence.com/content/cadence-www/global/en_US/home/tools/pcb-design-and-analysis/design-authoring/allegro-design-entry-capture-cis.html

https://www.cadence.com/content/cadence-www/global/en_US/home/tools/pcb-design-and-analysis/pcb-layout/allegro-pcb-designer.html

If you want to utilize the design files directly those would be the recommended tools.

Best regards,

Jim B

0 Vivek Gujari over 7 years ago in reply to Jim Brinkhurst1

Prodigy 185 points

Thank you Jim for the response!

0 Vivek Gujari over 7 years ago in reply to Jim Brinkhurst1

Prodigy 185 points

Hi Jim,

The ADS4449 has four channels but I need only one channel for my application. Will this converter be suitable for only one channel?

Thank you.

0 Jim Brinkhurst1 over 7 years ago in reply to Vivek Gujari

TI__Mastermind 44680 points

Hi Vivek
If you only need a single ADC channel then the ADS4149 is a better fit for your application. The ADS4449 will work OK but has more channels, a large package and high power consumption than is optimal.
Best regards,
Jim B

0 Vivek Gujari over 7 years ago in reply to Jim Brinkhurst1

Prodigy 185 points

Hi Jim,

Thank you for the response. Are there any reference design for ADS4149? Like TIDA-00093!

0 Vivek Gujari over 7 years ago in reply to Jim Brinkhurst1

Prodigy 185 points

Hi Jim,

I found the schematic and BOM files for the ADS4149!
Thank you for your help!

0 Vivek Gujari over 7 years ago in reply to Jim Brinkhurst1

Prodigy 185 points

Hi Jim,

I am looking for a Pspice model for ADS4149 in order to simulate it in Ltspice. Is there a way I can get it?
I can see there is an IBIS model but I cannot use this model in Ltspice!

0 Jim Brinkhurst1 over 7 years ago in reply to Vivek Gujari

TI__Mastermind 44680 points

Hi Vivek
We don't provide Pspice or other behavioral models for the high speed ADCs due to the challenges of accurately modeling these complex devices in that type of simulation.
The IBIS models can be used to validate the I/O interfaces with your system.
Best regards,
Jim B

0 Vivek Gujari over 7 years ago in reply to Jim Brinkhurst1

Prodigy 185 points

Hi Jim,

I guess the Pspice model for any ADC is not available, since we cannot simulate the ADC output!

0 Vivek Gujari over 7 years ago in reply to Jim Brinkhurst1

Prodigy 185 points

Hi Jim,

Is it possible to simulate the CDCE72010 clock synchronizer?
Also how do you perform the PCB layout for the ADC and clock synchronizer using IBIS model?

0 Vivek Gujari over 7 years ago in reply to Jim Brinkhurst1

Prodigy 185 points

Hi Jim,

I did found the bxl file which helped me to place the schematic model as well as PCB model.
Thanks!

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Data acquisition with 200 MSPS ADC