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ADS1114-Q1: Maximum tolerant voltage on AIN pins

ROHAN KADAM
Prodigy 155 points
Part Number: ADS1114-Q1

Analog input channel would get damaged  if 5 volts are applied on AIN0-AIN3 for the VDD of 3.3V ? reason to ask this question is maximum allowed VDD is 7V so all AIN pins should be tolerant to 7V irrespective of VDD ?

Thanks in advance .

  • 0
    TI__Expert 5140 points

    Hi Rohan,

    The absolute max analog input voltage depends on the VDD supply. 

    If VDD = 5V, the Max input voltage should not exceed 5.3V

    If VDD = 3.3V, the Max input voltage should not exceed 3.6V

    Anything higher could potentially damage the device. 

    Keep in mind this is the absolute max. For the recommended operating conditions, input voltages should be between GND and VDD:

    The ADC cannot measure voltages higher than VDD. 

    The ADC would output the code corresponding to FSR (7FFFh) or the output code corresponding to VDD if the FSR setting is higher (i.e VDD=5V and FSR= ±6.144 V) if the voltage at the input pins is higher than VDD.

    Best Regards,

    Angel