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TMS320F28379D: Internal ADC

Part Number: TMS320F28379D


Hi,

I am developing a design whereby I DO NOT want to use the Internal ADC of the TMS320F28379D since I am using an external 24 bit Sigma Delta ADC for my application due to high precision required. Can I just connect the REF High pinouts of the internal ADC to ground or should I just leave them floating?

Thanks

Johann