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ADS1114: Input impedance/current compared to ADS1113

Part Number: ADS1114
Other Parts Discussed in Thread: ADS1113, ADS1115,


Comparing the diagram of ads1113 with ads1114 and ads1115

It indicates a significant different input structure - ads1113 has no PGA in the input. Never the less the datasheet does not distinguish between the three versions. And the equivalent diagram for the input are the same.

I assume then that the PGA is also a switched amplifier of some sort and not a classical "linear" amplifier.

Is that correctly observed?