Hi Team, i used to design STM32WB5MMG IC for my application. i have temperarture sensor MAX30102. i need to communicate with mcu with i2c .its working on 1v8.shall i connect directly to mcu i2c? or 3V3 to 1V8 level translator is required inbetween?

[Foued_KH]

Hello @AJAY S​ ,

The MAX30102 operates on a single 1.8V power supply and a separate 3.3V power supply for the internal LEDs. (DATASHEET)

So, try to provide 1V8 as a power supply for the sensor MAX30102.

Foued

[AJAY S]

this is my shematic design sir here i2c i use 1v8 is that okey to communicate STM32WBMMG chip. in between 3v3 to 1v8 level shifter is required? or not thats my doubt

[Foued_KH]

I think you are alright as recommended in the Datasheet of the sensor MAX30102 :

Foued

[AJAY S]

MY host is 3V3 sir,but my sensor is 1v8 thats why i had confussion.

[Foued_KH]

Try to use a regulator to provide 1V8 like the LDK130M-R.

I advice you take a look : Schematic diagram Motion MEMS and environmental sensor expansion board for STM32 Nucleo -

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster. 

Foued

[MM..1]

You can use it , because is in max ratings but need have this levels in range primary low under ...as you see High dont have defined up limit ... abs max ratings is 6V

[AJAY S]

thank you for your support

[Ashutosh1]

@AJAY S​ please help me regarding the programming of this mcu stm32wbmmg i am able to flash a program but not able to find out the ble module

[MM..1]

https://www.youtube.com/watch?v=lFDMBeJpib0