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bq76PL455A-Q1: bq76PL455A-Q1 sampling rate

Danyal Yitik
Prodigy 100 points
Part Number: BQ76PL455A-Q1

Hello,

what is the sampling rate of the chip "  bq76PL455A-Q1 " in miiliseconds for 12 cellvoltages und 8 auxsignals ?

Thank you !

  • 0
    TI__Genius 10785 points

    go to datasheet 7.3.3 and you can find more details

    You can sample everything within 3mS.

    Is this what you are asking?

  • 0 in reply to Roger Hwang
    Prodigy 100 points
    Hello,

    thank you for your quick answer !

    Does that mean, that i can get EVERY 3ms all 16 VSENSE and all 8 AUX values to my microcontroller ?
    Does the Chip synchronize with the other Chips in the daisy chain row relating to measuring Voltage and AUX ?

    Thank you !
  • 0 in reply to Danyal Yitik
    TI__Genius 11480 points
    Hi Danyal,

    This means that the data gets into the pl455 in 3ms. This information still has to travel down the daisy chain (time determined by #bytes, read type, and number of modules with a 4MHz signal. The data must also go through the MCU UART peripheral, which will be determined by the above variables as well as the UART baud rate.

    If you do a broadcast sample and store, there will only be a difference of several ns in data acquisition (the time for the command to travel up the daisy chain). Then you can read back as desired.

    If you do a broadcast sample and send, that same several ns of delay between modules will be there, and data for the stack will be transmitted in one long, continuous string of HEX values, starting with the top device's data.

    A single device command only writes to one device, and by default cannot syncronize with other modules.