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ADS7953: reference and output structure

Part Number: ADS7953

Hi team,

When selecting ADS7953, have below queries:

1) VREF reference is provided externally. According to the specification, the full range range of analog input voltage can be VREF or 2 * VREF. How to choose VREF or 2 * VREF

2) Mxo output signal can be directly connected to AINP pin, or through primary follower and RC filter. How to select these connection modes?

Best Regards

  • Hello,

    1. The input range is selected through the Control Register settings. below is an example using Manual Mode. DI6 needs to be set high to select 2*VREF

    2. the MXO pin is common to all analog inputs. it can be connected directly to the AINP pin, but if you would like to use the same RC filter for all inputs, then you could connect it at the MXO pin. I would not recommend this as each new source would need to recharge the RC, thus I would recommend each input having its own RC circuit. The MXO pin is usually used to add a common driving amplifier that can drive all the inputs.