• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 47 subscribers
  • Views 262 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AMC1301: Polarity of outputs?

Paul Sorlie53
Prodigy 70 points
Part Number: AMC1301


Hey.  Based on Figure 24 in Typical Characteristics of the datasheet (inserted below), I build a PCB assuming increasing differential Vin = (VINP - VINN)  made decreasing Vout = (VOUTP - VOUTN). It didn't & I had to cut up my board to swap the outputs as they feed into a difference amp.  Upon review, I found Figures 45 and 50 in the datasheet which more clearly show the opposite.  I realize the gain is quoted at 8.2, but it neither has any sign nor is defined.  My request:  Could you please address this confusion?  Like either tell me what I misunderstood or tell me that it is confusing & TI will update the datasheet or whatever...  As long as I'm picking nits with the datasheet, in Figure 45, the VIN range shown is 0.5V -- wouldn't that be above the 300mV limit?

In the spirit of helpfulness, I thank you!

Paul

 

  • 0
    TI__Guru 55342 points

    Hi Paul,

    In the spirit of picking nits and avoiding confusion, I thank you as well! 

    I suspect you may unfortunately have been referring to an old version of the datasheet. What version of the datasheet are you referring to? 

    I'm using SBAS667F –APRIL 2016–REVISED APRIL 2020

    Looking at the one online for figure 24, I see that the labels are swapped: http://www.ti.com/lit/ds/sbas667f/sbas667f.pdf?&ts=1590005195804

    Figure 45 and 50 are about the rise/fall time of the outputs. Swapping VOUTP/VOUTN on top/bottom would result in similar behavior given that the inputs would go from FS+ to FS- instead of FS- to FS+.