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MRD2EVM: TMS3705+TMS37157 or MRD2EVM

Mauro Rosati
Prodigy 30 points
Part Number: MRD2EVM
Other Parts Discussed in Thread: TMS37157, TMS3705

Hello everyone,

I want to implement a data detection and transmission system via MF consisting of a TAG and a READER.
I have identified two possible solutions:
1) combined use of PaLFI TMS37157 with TMS3705 Range Extender Power;
2) use of a LF 134kHz HDX RFIDMRD2EVM Microreader.

Given that with regard to the solution 1 I have already identified the appropriate TAG, I would like to understand which of the two is more efficient, and relative to the solution 2 which TAG can use.

Thank you in advance for advice.
Good day

Mauro

  • 0
    TI__Mastermind 18265 points
    Hello Mauro,

    I am not sure if I got the point what you want to do.
    Can you please give more detailed information. (what das MF mean in this case?)

    What distance do you need for your data transmission. Do you have size restrictions for your antennas etc.

    If you need a LF TAG with an interface then the PaLFI is the right choice.

    Regarding the reader, with the microreader you buy a complete functional reader module, with the TMS3705 you have to build your own reader.

    Best Regards,
    Helfried


    e2e.ti.com/.../745469
  • 0 in reply to Helfried Vollbrecht
    Prodigy 30 points
    Good evening Helfried,

    I thank you for the answer.

    First of all I mistyped MF, but wanted to be LF (low frequencies); the application distance is at most 20 cm, while for the dimensions, I would like to have a smaller tag as possible.

    Greetings
    Mauro
  • 0 in reply to Mauro Rosati
    TI__Mastermind 18265 points

    Hello Mauro,

    the 20cm reading distance you want to achieve with a small tag is a tough goal.

    The MRD2 Eval Kit, which has a PCB antenna (4cm square), together with the PaLFI kit (ferrite antenna 1cm) has a reading distance of about 8cm.

    With a lager antenna this distance can be increased. A 32mm Read-Only Glass Transponder (2cm ferrite) is around 15cm.

    A reader with more output power will help to better charge up the transponder, but a small tag will have also a smaller return signal and then the reader sensitivity is the limiting factor.

      

    Best Regards,

    Helfried

     

  • 0 in reply to Helfried Vollbrecht
    Prodigy 30 points

    Hello Helfried,

    after your answer, I am oriented to continue with the tandem TMS37015 + TMS37157; I would like to ask you, if you know, if they are components in obsolescence or if instead their production will continue for 5 or more years.

    Thanks in advance.

    Mauro

  • 0 in reply to Mauro Rosati
    TI__Mastermind 18265 points
    Hello Mauro,

    there are no plans to discontinue these products.
    These parts should be available for at least the next 5 years.

    Best Regards,
    Helfried