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LMP91000: Transmit output data by backscatter.

Noel Williams
Prodigy 30 points
Part Number: LMP91000

Hello

Instead of the I2C interface I would like to have a voltage to a frequency conversion combined with an on-chip coil for RF energy harvesting and backscatter communication. The energy harvesting would supply power to the IC and the backscatter would send the data back.

Regards

Noel

  • 0
    TI__Genius 12780 points
    Hi Noel,

    You could design a RF energy harvesting system to supply power to the LMP91000, but I am not sure how you would make this "on-chip". This would need to be a system level solution if you are to use the LMP91000.

    Since the output of the LMP91000 is not analog (digital I2C), you will need a microcontroller to decode the I2C data. From that point, you could transmit out whatever protocol/output you would like.

    Hope that helps.

    Best Regards,

    Dan
  • 0 in reply to dBrock
    Prodigy 30 points
    I realise now that I need the I2C interface to set parameters within the LMP91000. I want to use the LMP91000 in medical applications. The ideal way to power it is through energy harvesting and obtain the data through backscatter. Can this LMP91000 be redesigned to add a contact for the analog data. This would be then sent back through the backscatter would some modification.
  • 0 in reply to Noel Williams
    TI__Genius 12780 points

    Hi Noel,

    You are correct that I2C is used to set the register settings in the LMP91000. Please disregard my last comment in regard to the output data. The output is an analog voltage at VOUT from the transimpedance amplifier.

    This voltage at VOUT is proportional to the current of the electrochemical cell, and can be set with internal or external resistors.

    We do not support on-chip modifications, so any design requirements for energy harvesting or backscatter communications must be implemented at a systems level.

    Best Regards,

    Dan