Reg: ADC (ADAS3023BCPZ) not working

Hi,

I am using ADC IC (ADAS3023BCPZ) which is working for only 20 to 30 minutes; after that it gets heated-up by drawing more current from the supply.

Used Supply details - 

VDDH -> +15V ; VSSH -> -15V ; AVDD,DVDD -> +5V ; VIO -> 3.3V

Only difference in schematic with respect to datasheet is - EP(Exposed Pad) is connected to AGND in my board instead of VSSH.

Is this the reason for heating-up the IC after some minutes ?

Please clarify on this point.

Thanks,

Tusarkanta Das

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