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TM4C1294KCPDT: Source resistor for ADC input

Part Number: TM4C1294KCPDT

Hello team.

On Figure 15-7, diagram shows tthat, Rs is needed for ADC antialiasing filter.

Looks like the value of Rs is written on the Table 27-44, which is 500Ω.

Is Analog source impedance of 500Ω = Rs of ADC input filter resistor?

Best Regards,
Kei Kuwahara