TLV3605: Negative Supply for TLV3605

Hi Clemens,

Thanks for the prompt reply. I have some further questions :

1. What's the different characteristics you mean between TLV3601 and TLV3801?

2. I have done some simulation with the TINA test circuit from https://www.ti.com/lit/tsc/snom709. However I found that even thought I change the VEE to some negative voltage, the LVDS output voltage remains around +1.2V. Can you advise on this?

Regards,

Soo Cheng

Hi Soo Cheng,

Thanks for reaching out. Please see TLV3801 data sheet, product information and support | TI.com. The main difference is that the TLV3801 has faster prop delay, lower overdrive dispersion, and allows you to go split supply on the inputs, but has the LVDS output referenced from GND. 

And you are right, the output should be referenced from VEE, but I believe the model is assuming the VEE = GND = 0V. So if you have a VEE that is negative, then the output should be +1.2V above that negative voltage from VEE. However, this would not make it LVDS standard compliant. 

IF you need to go to split supply on the input but still have LVDS ground referenced output, then I would recommend using TLV3801. Note that this device does not have the SHDN and LE/HYST pins. 

Hi Nguyen,

Thanks for the info.

Regards,

Soo Cheng