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AFE7903: Inquiry on AFE7903 Suitability for Cellular Repeater Applications

Alberto Monti
Prodigy 10 points
Part Number: AFE7903
Other Parts Discussed in Thread: AFE7920

Tool/software:

Dear Texas Instruments Support Team,
I'm here to request your support on the potential use of the AFE7903 transceiver for a project we are developing.

Our aim is to integrate the AFE7903 as a core component in a cellular repeater operating in the 900 MHz band.

Specifically, we would like to understand if the AFE7903 is suitable for:
1. Handling two independent Rx-Tx paths (one for uplink and one for downlink) with a separation of 45 MHz between the two paths.
2. Implementing digital filters with high selectivity; our useful bandwidth is 4 MHz at 900MHz, and we require an attenuation of at least 30 dB at 400 kHz from the band edge.
3. Ensuring a group delay of less than 6 microseconds within the passband.


Are there any application notes or documentation available for this application?
Thank you very much for your support.
Best regards,
Alberto Monti
Nexum

  • 0
    TI__Guru 71959 points

    Hi Alberto,

    Our systems and marketing team will reach out to you to recommend the best suitable part in the AFE79xx family that can fit your 900MHz band application the best. Thank you

    -Kang

  • 0
    TI__Intellectual 1956 points

    Hi Alberto,

    Thank you for reaching out! The AFE7903 is more of a general purpose transceiver, and would like to redirect you to the AFE7920, which is suited for the end application you are developing. It will satisfy the use case for this application; in addition, for more information, please request access to design files and an extended datasheet of the AFE79xx for wireless infrastructure applications here: https://www.ti.com/drr/opn/AFE79XX-WI-DESIGN

    Let us know if you have any questions. Thank you!

    BR,

    Simran

  • 0 in reply to Simran Nanda
    Prodigy 10 points

    Hi Simran, thank you for your reply.

    I noticed in the AFE7920 datasheet that it is suitable for repeater applications, but I don’t need 4 Tx and 4 Rx channels. Additionally, the AFE7920 is too expensive for a repeater or minirepeater application, which is typically used for small radio coverage areas. What are your thoughts on the AFE7903? Could it be a suitable alternative for repeater applications? I would appreciate any suggestions you might have.
    Thank you 
    Alberto