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Trouble with ADC on c5515

Anand Chandrasekhar
Intellectual 525 points

Other Parts Discussed in Thread: TMS320C5515

Hi,

I was reading abt SAR adc of TMS320c5515. I have two sensors which give analog output.

I want to digitize the analog output from both the sensors simultaneously. Is it possible for C5515

to do two A/D conversion simultaneously ?

Regards,

  • 0
    TI__Mastermind 30641 points

    Hi,

    You cannot sample both sensors simultaneously, but you can sample them within a few microseconds of each other.

    "Once a conversion is initiated, the programmer must wait until the conversion completes before selecting another channel or initiating a new conversion."

    "The SAR A/D module can operate at a maximum clock rate of 2 MHz (500 ns) and takes 32 clocks cycles to convert a value. This results in a maximum sample rate of 64 ksps" (or 16 uS per sample). It will take additional clock cycles to switch the channel measured.

    Hope this helps,
    Mark