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RF430FRL152H: Problems connecting chip and sensor

Joohee Kim88
Prodigy 130 points
Part Number: RF430FRL152H
Other Parts Discussed in Thread: , RF430CL331H

Hello,

I am working on a project to read the resistance of the sensor by mobile phone by connecting sensor, antenna and nfc module.

I have four questions.

First, my sensor is very small, so the nfc chip should be small. Can I possibly get a bare die for the RF430FRL152H?

Second, if I can buy a bare die, how do I code it to read the sensor's resistance on the bare die?

Third, is there a metal pad on the bare die that can connect the sensor?

Fourth, can I get the technical support for the nfc chip and the application part that can be connected with the mobile phone?

I just started this project and I do not know about this area.
Answers would be of great help.

  • 0
    TI__Expert 7820 points

    Joohee Kim88 said:
    First, my sensor is very small, so the nfc chip should be small. Can I possibly get a bare die for the RF430FRL152H?

    We don't have bare die available for production at this time.  I will check internally if we have any samples.

    Joohee Kim88 said:
    Second, if I can buy a bare die, how do I code it to read the sensor's resistance on the bare die?

    RF430FRL152H has functionality to do ADC measurements over RF control from the box.  It does not need to be programmed.  But it can be if extra functionality is needed.  Also it is capable to be programmed over the air.

    Joohee Kim88 said:
    Third, is there a metal pad on the bare die that can connect the sensor?

    Yes there are metal pads on the die that connect to sensors.  However, keep in mind that it also needs a few capacitors on the power supplies.

    Joohee Kim88 said:
    Fourth, can I get the technical support for the nfc chip and the application part that can be connected with the mobile phone?

    We have an example NFC project at: http://www.ti.com/lit/zip/slac691 

    In these firmware examples, there is an NFC example project.  Once programmed into the device you can read it out with an NFC reader, like a mobile phone.

    If you need to develop a custom NFC application, we have one TI design example (for an ISO14443B) here:

    http://www.ti.com/tool/TIDM-BIOSIGNMONITOR?keyMatch=rf430cl331h&tisearch=tidesigns

  • 0 in reply to Alex K.
    Prodigy 130 points
    Thank you very much for your reply.

    I have more questions.

    First, when can I order a bare die? I can wait because nfc chip bare die is very necessary for our project.

    Second, if it is already coded, can I read the ADC measured value with my mobile phone if I connect only the sensor and antenna to the nfc chip? ADC is 14 bits, right?

    Third, what does it mean to be able to program with air? Is it programming through an antenna?

    Fourth, I can not open the project you sent me. Do I need to have a specific program to open the file?

    Thanks again for the detailed answer.
  • 0 in reply to Joohee Kim88
    TI__Expert 7820 points

    Joohee Kim88 said:
    First, when can I order a bare die? I can wait because nfc chip bare die is very necessary for our project.

    Right now we do not have a process setup to order bare die.  We may have samples available, but there may be a delay.

    Joohee Kim88 said:
    Second, if it is already coded, can I read the ADC measured value with my mobile phone if I connect only the sensor and antenna to the nfc chip? ADC is 14 bits, right?

    Yes, the device is already coded from the box.  However you need an antenna and a few external components including capacitors.  Please check section 7 (of the datasheet) for the example circuit.  The device needs at least 6 external capacitors to stabilize the power rails.

    Joohee Kim88 said:
    Third, what does it mean to be able to program with air? Is it programming through an antenna?

    With RF operational at first power up, standard RFID/NFC ISO15693 commands can be sent to write to FRAM memory.  The commands that need to be used are read/write single block.  Yes this is done using an antenna connected to the device and an RFID/NFC reader.

    Joohee Kim88 said:
    Fourth, I can not open the project you sent me. Do I need to have a specific program to open the file?

    You need Code Composer Studio to use the example project.  The latest version for MSP430 should work just fine.

  • 0 in reply to Alex K.
    Prodigy 130 points

    Thank you for your answers.

    If I can not get a bare die, is there a similar model that can read resistors via NFC technology? If so, what is the model name?

    You said that bare die requires a few capacitor. So, does the common chip we buy include all of the capacitors?

  • 0 in reply to Alex K.
    Prodigy 130 points
    Thank you for your answers.

    When will I know if I have a bare die available?

    If I can not get a bare die, is there a similar model that can read resistors via NFC technology? If so, what is the model name?

    You said that bare die requires a few capacitor. So, does the common chip we buy include all of the capacitors?
  • 0 in reply to Joohee Kim88
    TI__Expert 7820 points

    We will let you know if there are bare die samples available.

    RF430FRL152H is only one of the chips that I know that has NFC capability and has resistance measurement support.

    The capacitors are needed externally, bare die or in the packaged part.

  • 0 in reply to Alex K.
    Prodigy 130 points
    So far, the answers you gave me have helped me a lot. Thank you.

    I downloaded the application through the link you sent.
    How do I open an application's map file?
    I want to know what information is stored in the application through the map file.

    Also, will this work with the application and the evaluation board(NFC ISO 15693 Sensor Transponder Evaluation Module)?
    In other words, is it possible to read the resistance that the evaluation board sends through this application?
    If so, can we read the resistance change associated with the chip with this application?
  • 0 in reply to Joohee Kim88
    TI__Expert 7820 points

    Joohee Kim88 said:
    Also, will this work with the application and the evaluation board(NFC ISO 15693 Sensor Transponder Evaluation Module)?

    If you are referring to the "Multi-Parameter Bio-Signal Monitor Reference Design For Personal Monitoring" application, it can't be used directly with the RF430FRL152HEVM.  I provided this as an example that could be used as a reference.

    If you need an application that you can be immediately used with the RF430FRL152HEVM, please refer to this E2E thread:

    https://e2e.ti.com/support/wireless_connectivity/nfc_rfid/f/667/t/411551

    Joohee Kim88 said:
    In other words, is it possible to read the resistance that the evaluation board sends through this application?

    No the first application that I sent, only works with RF430CL331H which does not have resistance measurement functionality.

    The application that I referenced in here, does read the temperature result from the RF430FRL152HEVM.  This means that it is using the resistance measurement functionality of the device.

    Let me know if you have further questions.

  • 0 in reply to Alex K.
    Prodigy 130 points
    I am studying the application part now.
    I am really grateful for your advice.

    And there is one more thing I'm curious about.
    I want to see if the chip works using our antenna.

    When I connect both terminals of ant1 and ant2 to the chip, does not the chip drive?
    And if the antenna resonance frequency is not 13.56MHz, is the chip not working at all?
  • 0 in reply to Joohee Kim88
    TI__Expert 7820 points

    RF430FRL152H is a transponder, meaning that it does not output a signal for RF communication. Instead it communicates using active-load  modulation.  The NFC/RFID reader/writer outputs a RF carrier and this device load-modulates it for a response on that carrier. It does not output a signal. But the reader/writer is able to receive and demodulate and decode the message.

  • 0 in reply to Alex K.
    Prodigy 130 points
    We would like to read the sensor information from smartphone application by connecting our sensor and antenna to RF430FRL152H.
    Can not we proceed with this project on this chip?
    And is bare die still impossible to buy?
  • 0 in reply to Joohee Kim88
    TI__Expert 7820 points
    In theory you can connect your analog sensor to the RF430FRL152H. Just make sure that it does not output more than 0.9V (or scale it down if it does). The signal must not change very quickly, max 1 Hz. If you meet these conditions, then you can use the sensor with this device.

    If you are having problems, please describe them and we can help you resolve them.

    For your antenna, reference this app note how to design one: www.ti.com/.../sloa217

    We do not have a commercially available bare die now and do not plan on having one in the foreseeable future.