I am using the AD8352 differential amplifier to drive the AD9253. Many application notes write that the ADC input impedance is reduced to 200-400 ohms by an external parallel resistor.How is this specific value determined?Is it to meet the front-end amplifier performance?
please refer to www.electronicdesign.com/.../highspeed-adc-input-impedance-a-measured-versus-a-mathematical-approach
Tthanks for your reply，The website cannot be opened. Is there any other way or document?
Hi Dragon. The link opens for me just fine. Can you try a different browser?