AFE5809 for Sonar

Naik

Other Parts Discussed in Thread: AFE5809, AFE5809EVM

Hello,

I am using AFE5809 for sonar application. I will give input from T/R switch and external clock input from J15 port of AFE5809 board. and LVDS connected to FPGA.

I might have to eliminate unwanted blocks from APFE5809. Can I please get schematic file and PCB files? Also, If you guys can comment on things that I should keep in mind for this design, I really appreciate it.

Thank you.

over 7 years ago

Praveen Aroul over 7 years ago

TI__Mastermind 49176 points

Hello Vatsal,

We have received your inquiry regarding the AFE5809 and hope to have some answers back to you shortly.

Chuck Smyth over 7 years ago

TI__Expert 6320 points

You can find the AFE5809 EVM Materials here:

Thanks, Chuck Smyth

Chen Kung over 7 years ago

TI__Genius 12025 points

Hi Vatsal,

Thanks for using the AFE5809 device and AFE5809EVM.

The schematic file is stored inside the AFE5809 user's guide.

Its location is linked at: www.ti.com/.../afe5809evm

Also it shows you for the board layout plots as well.

The original EVM board design is majorly used for ultrasound device application.

For sonar application, please modify some capacitor value as you need below:

Please refer to the data sheet (page 23 and page 62):

These two can show you how to make you input signal flat from 100kHz.

Thanks and best regards,

Chen

Naik over 7 years ago in reply to Chuck Smyth

Intellectual 720 points

Hi chuck,

Sorry I am not able to download file from box.com. Can you please send it to my email address.
vatsalnaik15@gmail.com

Thanks

Naik over 7 years ago in reply to Chen Kung

Intellectual 720 points

Hello Chen,

Thank you for the information.

Naik over 7 years ago in reply to Naik

Intellectual 720 points

Hello,

I want to configure AFE5809 chip into TGC mode. and Also I want the Demod & LP Filter to enable. Can you please tell me how can I do that?

Does it have any onboard memory which can save my configuration? So I can run in the same configuration after the full reset and without connecting USB cable.

Thank you

Chen Kung over 7 years ago in reply to Naik

TI__Genius 12025 points

Hi Vatsal,

Thanks for using our AFE5809 device.

After the power supply was turned off (including USB plug), everything (registers and configurations) will be reset.

Please read our AFE5809 user's guide:

www.ti.com/.../afe5809evm

That will show you step by step.

Thank you very much!

Best regards,

Chen

Naik over 7 years ago in reply to Chen Kung

Intellectual 720 points

Hello, One more question. I checked AFE5809 Sonar Receiver Reference Design (TIDU702) and schematic diagram for that design(http://www.ti.com/lit/df/tidrjg1/tidrjg1.pdf).

From that schematic diagrams, I didn't see any Mixer used. but If I want to use Digital I/Q Demodulation Do I have to provide any clock other than ADC_Clock? If no, How it can Demodulate I/Q ?

Thanks.

Chen Kung over 7 years ago in reply to Naik

TI__Genius 12025 points

Hi Vatsal,

Thanks for letting us know where you are looking for.

We will forward this question to the expert.

Thank you!

Best regards,

Chen

Chuck Smyth over 7 years ago in reply to Naik

TI__Expert 6320 points

Vatsal,

The digital demodulator is internal to the device and is after the ADC in the signal chain. The LO frequency is programmed by a register value and is proportional to the ADC frequency. The LO frequency is f= N*Fs/65536. For instance, an N value of 8192 and an Fs =40MSPS, would mean a mixer frequency of 5MHz. The TX_Trig signal can be used to align the phase of the internal LO with the input signal.

Thanks,

Chuck Smyth

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AFE5809 for Sonar