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AD5254 50K vs 1K

Question asked by JCsoftware on Jan 22, 2014
Latest reply on Feb 3, 2014 by DRice

Hello,

 

I ordered two 50K versions of this chip and two 1K versions as well. According to the datasheet (http://www.analog.com/static/imported-files/data_sheets/AD5253_5254.pdf), they have identical pin-outs. The 50K responded to the power and grounding exactly as expected (I2C communication works as well). However, when the same circuit was applied to the 1K version, they burned in less than a minute. Could someone help me understand why these two 1K pots burned under the same circuit that made the 50K work well?

 

Thanks in advance for any help.

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