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DS90LV019: LVDS device check

Jenson
Intellectual 2505 points

Part Number: DS90LV019
Other Parts Discussed in Thread: SN65LVDS049, SN65MLVD203B

Hi Team,

We would like to run some LVDS test and need 100 Mbps, FD, high CMMR LVDS device, I could only find DS90LV019, can you help me to find the latest and suitable device here?

Thanks!

Jenson

  • 0
    TI__Mastermind 29065 points

    Hi Jenson,

    Many of our LVDS devices are quite mature. So we don't necessarily worry about recommending the latest option, just the best fit. 

    How many signals does the customer need in each direction? Just one or more? We have single, dual, and quad channel options. Its usually more practical to try and pick one IC that has all the TX and RX needed, or two (one for TX and one for RX) if needed. The SN65LVDS049 would provide 2 drivers and 2 receivers, and some room on their 100 Mbps required rate.

    Jenson said:
    high CMMR LVDS device

    Are you saying they need high common-mode rejection ratio, or high common-mode range? 

    An M-LVDS device such as SN65MLVD203B would provide larger common-mode range than most LVDS devices if that is needed. MLVDS devices also have drivers and receiver pairs, although they aren't always full duplex, that 203B device is. 

    Best Regards,
    Brandon Fisher 

  • 0 in reply to Brandon Fisher94
    TI__Intellectual 2505 points

    Hi Brandon,

    Thanks!

    Customer only need one driver here.

    and for the high cmmr we will check with customer, do you have both solution to propose to customer?

    Thanks!

    Jenson

  • 0 in reply to Jenson
    TI__Mastermind 29065 points

    Hi Jenson,

    Jenson said:

    and for the high cmmr we will check with customer, do you have both solution to propose to customer?

    CMRR isn't really a specification we would use for LVDS drivers/receivers. There is not an analog input/output to measure a rejection ratio for.

    The ability of an LVDS device to reject common mode noise is essentially built into the LVDS specification, so it wouldn't vary significantly from device to device. 

    Jenson said:

    Customer only need one driver here.

    If all the customer needs is one driver, then the DS90LV011A is the good choice. The DS90LV012A would be the corresponding receiver IC. 

    Best Regards,
    Brandon Fisher