Amr Wael
Member level 5
Hello , I would like to design a high voltage attenuator that attenuates a signal from 1000Vpeak to full scale of 250mVpeak in order to be suitable for an Isolation amplifier IC
The input capacitance of the IC is around 4 pF therefore , if I used only a resistive divider (Clearly with a high resistance value for R1), it will form a low pass filter with the 4 pF capacitor and if I add a capacitive divider with the resistive divider , the voltage becomes dependant on the frequency and introduces an error of 9.8% at around 50 KHz.
is there an easy solution to attenuate 1000V with such attenuation ratio while maintaining the -3dB bandwidth to be DC to 60 KHz ?
Thank you very much in advance.
BR
Amr Wael
The input capacitance of the IC is around 4 pF therefore , if I used only a resistive divider (Clearly with a high resistance value for R1), it will form a low pass filter with the 4 pF capacitor and if I add a capacitive divider with the resistive divider , the voltage becomes dependant on the frequency and introduces an error of 9.8% at around 50 KHz.
is there an easy solution to attenuate 1000V with such attenuation ratio while maintaining the -3dB bandwidth to be DC to 60 KHz ?
Thank you very much in advance.
BR
Amr Wael