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ADS1018-Q1: Is it possible to make VDD=0V before AINx are not 0V?

RYO
Intellectual 2000 points
Part Number: ADS1018-Q1
Other Parts Discussed in Thread: ADS1018

Hello all,

Thank you for your support always.

Is it possible for ADS1018/1118-Q1 to make VDD=0V before AINx are not 0V? Does this device have any internal connection between AINx and VDD or GND?

Thank you,
RYO

  • 0
    TI__Guru* 97775 points
    RYO-san,


    Generally you want to bring up VDD before applying voltage to the analog inputs. The Absolute Maximum Ratings table (on page 5 of the datasheet) shows that the analog input voltage should not go above VDD+0.3V.

    In this device (like most devices) there are reverse-biased diodes from AINx to VDD for ESD protection. You can see this in Figure 8 of the datasheet on page 11 in the diagram for the input multiplexer.


    Joseph Wu