1 Reply Latest reply on Jan 30, 2018 1:04 AM by samp

    PSoC1 ADC10 maximum sample rate

    matsushita-s_1538871

      I'd like to know maximum sample rate of ADC10.

      Device is CY8C21123-24SXIT.

       

      Current Data sheet mentions how to calculate sample rate.

      But there is no maximum spec.

      I can see maximum spec is 7.35 Ksps in old data sheet.

       

      Please tell me maximum sample rate of ADC10.

       

       

        • 1. Re: PSoC1 ADC10 maximum sample rate
          samp

          Hello Matsushita-san,

           

          The ADC10 can run at 7.35ksps under the following conditions:

          Sysclk = 24MHz

          Cpuclock = 24MHz

          VC1 = 1

          VC2 = 3

          VC3 Source = VC2

          VC3 Divider = 64

          Dataclock = VC2

          PWMH = 16 VC3 Period

          PWML = 1 VC3 Period

          Sampling Rate = 7.35ksps

           

          Maximum sampling rate of 7.35ksps is possible only at 5V operation. At 3.3V and 2.7V as the CPU speed is less, the PWM low period is not sufficient for ADC calculation. So the PWM low period is increased and as a result the sampling rate comes down to 6.94ksps and 4.26ksps respectively.

           

          Sampath