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I required suitable part for the requirement of interfacing with ADAS1135 to IMX8MQ.

sai jyothi
Prodigy 145 points
Other Parts Discussed in Thread: TXU0304, SN74AXC4T774, SN65LVDS4

I required a suitable part from TI for the below requirement.

  • Coming from the ADAS it shifts the data back to us in an LVDS stream. We will convert the LVDS to a single ended 0-1.8V CMOSing ( LVDS to CMOS to TTL convertor chip. It could go into a port in the imx8. It will need to go to some other synchronous series port. One mx8 will be just convert the data and place it in the memory. 

It is for a medical application.

Earlier we have used Intel cyclone10 FPGA between the ADAS1135 and IMX8MQ processor, due to supply chain issue we are planning to remove FPGA and adding LVDS to CMOS to TTL converter chip.

Please suggest the part which can fulfil my requirement.

Regards,

Jyothi.

  • 0
    TI__Guru 51816 points

    Hi Jyothi,

    For the synchronous communication, could you clarify if the direction of each channel is uni-directional similarly to SPI for push-pull applications?

    If so, I would recommend taking a look at SN74AXC4T774 (0.65V - 3.6 V) and TXU0304 (1.1V - 5.5V) if applicable.

    If not, I would need further clarification on what the supplies would be for the level shifter, as well as the interface type / protocol (ex: open drain I2C, push-pull SPI), data rate, number of channels/bits and any drive strength requirements, thanks.

    Best Regards,

    Michael.

  • 0 in reply to Michael Ikwuyum
    Prodigy 145 points

    You shared bus transceiver IC but I am looking for a chip which can convert LVDS to CMOS to TTL. 

    This differential pair of LVDS input coming from ADAS1135 sensor, the chip should convert this LVDS to CMOS to TTL, this output can connect to the IMX8MQ processor. 

    Please suggest a suitable part.

  • 0 in reply to sai jyothi
    TI__Guru 51816 points

    Hi Jyothi,

    Apologies as I understood your concerns as the need for a transceiver / level shifter interfaced between the processor and the single-ended LVDS driver.

    Without clarification on how many channels needed as well as the data rate, I would recommend taking a look at SN65LVDS4 for the 1.8V application,  thanks.

    Best Regards,

    Michael.

  • 0 in reply to Michael Ikwuyum
    Prodigy 145 points

    Thank you for the reply.

    I required 3 channel part number for differential LVDS to TTL/CMOS.

  • 0 in reply to sai jyothi
    TI__Guru 51816 points

    Hi Jyothi,

    Unfortunately, most LVDS drivers and receivers available on the market mainly supports 3.3-V signals as we are yet to release 1.8-V LVDS devices with more channels (targeted for early next year) and do not offer a 3 channel device for 1.8V at this time.

    However, I would further recommend using 3.3-V LVDS device to fulfil the channel requirement; interfaced with the recommended voltage shifter, translating the 3.3 V to the needed 1.8V. Please see How to Support 1.8-V Signals Using a 3.3-V LVDS Driver/Receiver + Level-Shifter to further help with the implementation, thanks.

    Best Regards,

    Michael.