Part Number: INA149
The Difference amplifier INA149 in our circuit gets Input common mode voltage of 30V. During one particular testing, we found that the IC got damaged and we are trying to debug the issue. We are wondering about ESD protection diodes in the IC. Suppose the Input Voltage is up before the Power supply (+/-15V), will this cause damage to the IC. Page-13 of datasheet mentions that the current through ESD diode must be limited to 10mA. We have a 100 ohm resistor at the input pin. So when the input pin voltage reaches 30V & if the Power supply pin does not have any Voltage, Will the IC be damaged? The current through ESD diode will be 30mA in this case.
Zak Kaye Precision Amplifiers Applications
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