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ADS1298: lead off current setting for 500 M ohm DC impedance

Shanoj G
Prodigy 150 points
Part Number: ADS1298

Hello,

We are using ADS1298IPAG in our design. As per datasheet section 7.5 Electrical Characteristics, DC input impedance during Current source lead-off detection mentioned as 500 M ohm. May I know this impedance specified is at which lead off current setting? As I understand lead off current can be set as 6nA,12nA,18nA and 24nA.

thanks

Shanoj