We are driving ADS5500 using ADC driver THS4500. The Driver operates with +/-5V supply. This is higher than the rated ADC analog input voltage.
Can you suggest the suitable input Protection to prevent damage to ADC? We tried using Clamp diode, but we are having a 250 ohm diode current limiting resistor. The datasheet mentions the ADC has input Common mode current of 2ma through each pin. This current causes almost 0.5V drop across 250 ohm resistor, hence we will not meet input range of ADC.
Can you suggest appropriate protection scheme?