saurabh17g
Member level 2
I am using ADC - ADS805 with a sampling rate of 5MHz. The response of the supply is stable and the ripple is in millivolts. But when the circuit with clock (5MHz), RAM , counters , ADC is used, the vcc fluctuates with a ripple of 0.5V. Due to this , the internal reference pin voltage(vcc/2) of ADS805 fluctuates. This results in spordic output of ADC. we have connected a standard tectronix powersupply whose current rating is upto 10A.
The power supply output fluctuates only at the edges of the clock.The fluctuations are high at the rising edge which is used by both adc and the counters and low at falling edge which is used only by the adc.
Plz suggest me
The power supply output fluctuates only at the edges of the clock.The fluctuations are high at the rising edge which is used by both adc and the counters and low at falling edge which is used only by the adc.
Plz suggest me