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TRF7970A: TRF7970 card emulation RF range issue

Part Number: TRF7970A
Other Parts Discussed in Thread: MSP-EXP430F5529LP, DLP-7970ABP

Hi Team,
I want to share the data to mobile phone with NFC card emulation. The hardware describes below. The effect of different mobile phones is too different. Especially IPhone is particularly difficult to sense. If the effect of induction is too different, it will be difficult for the user to use. My questions are:

1. The antenna of the module is mainly designed to support the reading mode. Will it affect the performance of the card emulation function?
2. Are there any references related to antenna hardware that can be provided? Hope to enhance the sensing range of the card emulation function.
3. In the TRF7970 card simulation mode, can its sensing distance be the same or similar to the distance of the physical TAG? Taking 14443A as an example, it can read and write at a distance of 3-5 cm. At present, the distance between the mobile phone and the module is less than 1 cm to successfully read and write.

The above problem is troublesome, thank you.


Launch Pad:MSP-EXP430F5529LP
NFC Module:DLP-7970ABP

  • Hello Customer, thank you for your question and interest in our products.

    The forum support of this product has been reduced to first reference our existing documentation and collateral. TI does not have plans to stop production or place the device into a “Not Recommended for New Design” status, we genuinely feel most questions on these devices can be answered by reviewing existing collateral and previous questions asked. Please feel free to continue to use this device as you see fit for your applications. For support, please take a look to the “Similar Topics” section at the lower right of the thread page. In addition, please consult the existing collateral in the “Technical Documentation” section of the TRF7970A product web page along with the Frequently Asked Question document. Alternatively, you can use the search engine of your choice to look for related E2E threads. With each of these resources we believe it will help with your question.