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.
Part Number: MSP430FR6043
Hi Team,I just want to confirm the information in the Water flow measurement of MSP430FR6043 if the 3-µA overall current consumption with 1 set of results per second is for the consumption for 1 TOF only or more than 1 TOF?Thanks!Jonathan
let me rephrase it. The charge consumption per measurement is smaller than 3uAs (micro amp seconds). The measurement includes a complete upstream and downstream pules transmission, capture and math evaluation of the result. If you would like to have one complete measurement per second this translate into 3uA; for ten measurements per second to 30uA average current consumption. This is valid for typical transducers used in utility meters of regular size @ 1MHz. . A DN50 or DN100 pipe might allow larger transducers, or longer excitation time; for that you need more power.
Also not included is the leakage current of the device or the real time clock module and it's 32kHz oscillator (those are required anyway to build a real meter). But strictly speaking they are not part of the measurement.
Now measuring that current is tricky due to its high dynamics... the peak current would go into some mA (depending on the chosen components). But those milliamps are only consumed for some hundred microseconds; then there is nothing for almost one second. Don't us a regular multi-meter to measure that you will fail.
Please verify the answer by clicking the green "RESOLVED MY ISSUE " button in case the reply solved your question.
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.
In reply to Johann Zipperer:
Hi Johann,Thank you for this response.I forward this to our customer and comes up with this question:If he has 1000mAh battery how long it will keep the ultrasonic metering system on(calculating dTOF)?orhow much amperage the MCU will consume to do 1 dTOF and 3600 dTOF?Thank you for your support.Jonathan
In reply to Jonathan Geronga:
I'm making simple conservative assumptions...
- 1 measurement/s => 3uA
- basic application. LPM3,LFXT32k,LCD, int bias,@25C (DS Tale 5.8) =>2 uA
- Radio => no radio, but LCD always on instead =>3uA average current.
- 1000mAh /5uA => 200000h => 8333d =>22.8a => 60% self discharge...
I would estimate 10 years unless you use a battery with real low self discharge.
for 8 measurement/s => 24uA+2uA => 26uA total consumption
- 1000mAh/26uA => 38461h => 1602d => 4.39a =>25% self discharge => 3+years
these are just rough estimates, have fun
... my finger was to quick, sorry for the typo and on the one measurements/s the total consumption is 5uA average....
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.