Part Number: ISO7731
Customer found there is power consumption difference among:
A, VCC1=3.3V and VCC2=3.3V
B, VCC1=3.3V and VCC2=5V
485 Baud rate=9600.
they found the power consumption of supply solution A is lower than solution B. did you see that and can you explain to me?
The current consumption of device is expected to be higher for higher voltage and lower for voltage, though the difference is very minimal. I see that customer is observing the same and hence is not a problem. The primary reason for this difference is that higher voltage will enable marginally faster operation of device especially related to switching performance (like rise and fall times). The device achieves this by drawing marginally higher current and hence the difference.
The above explanation is true considering all test conditions (like load capacitance CL) other than supply voltage to be the same. Any difference in any of the test conditions can also lead to higher differences in current consumption.
I am assuming customer is seeing small difference in current and not an unusually big difference. Let me know if the current difference is large, thanks.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.