Part Number: LSF0108-Q1
i need to define the supply current of LSF0108-Q1 , this IC is powered by Vref_A= 3.3V, and Vref_B=5V; all GPIO are pull up with resistor 1Kohm of each side
i need the Max current supply in the range of -40°C to 115°C
Please refer to the following app note regarding the LSF family of devices.
If you look at Figure 1 in the app note, you will see that the Vref_B and Vref_A supplies are connected. The way this works is that Vref_B will supply current to Vref_A. This means that there is technically no VCC to ground current, which means that ICC for the device isn't easy to specify.
If we take the worst case, however, Vref_B can be as high as 5V and Vref_A can be as low as 0.95. Therefore, we can calculate the maximum current as the voltage difference between these two supplies, divided by the recommended 200k resistor required as shown in the figure.
The variation will depending on the variation of the resistor value over temperature, which can be calculated further based on the resistor used.
I hope this helps to clarify. Please let us know if you have additional questions.
In reply to Michael J Schultis:
In reply to noureddine tariba:
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. 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 respect to these materials. 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.