what is difference between Absolute input voltage range and input voltage range

For ADUC(ARM7) family process, there are two parameters for ADC feature:

Absolute input voltage range and input voltage range

for example, ADUC7034, the ADC parameter for voltage channel is :

Absolute input voltage range:4~18V

Input voltage range:0~28.8V。

I don't know what is the difference between these two parameters.

I had created a case for support, but china support engineer can't answer it and not response me for long time.

I have to post it here to find if any one america engineer can resolve it.

 

thanks.

  • 0
    •  Analog Employees 
    on Feb 13, 2015 9:15 AM over 6 years ago

    Hi Huang,

    The voltage input channel is designed to measure from 0V to 28.8V. As the device main application is lead acid battery monitoring, the relevant and specified absolute input voltage range is 4-18V.

    The voltage channel can measure outside the 4-18V band, however the listed max/min specifications might be exceeded.

    regards

    Holger