INA226: INA226

Arabella Zhang

Intellectual 1950 points

Part Number: INA226

Tool/software:

Dears,

Recently, the current monitoring of INA226 in the customer's radar equipment failed. The current value read was fixed at 8192mA, and the actual value should be within 20mA. After replacing the new INA226, the data was read normally, and the current value was still 8192mA after re-welding, which ruled out the problem of cold soldering. The chip appearance was not damaged, and the function was good when it left the factory. Can the problem of current error caused by the damage of pin 9 be reduced by improving the circuit?

Best Regards,

Arabella Zhang

3 months ago

0 Arabella Zhang 3 months ago

TI__Intellectual 1950 points

The schematic diagram is as follows:

0 Mitch M 3 months ago in reply to Arabella Zhang

TI__Mastermind 23240 points

Hello Arabella,

Your schematic looks fine, so there isn't a problem there. If you are seeing this on multiple boards, then it's possible there is a system level issue causing the abs max specs to be exceeded and damage the device. In that case, adding some protective circuitry may help. If this is the only board that has failed, then it's possible it was a external one-time event, such as ESD, that damaged the device.

Regards,

Mitch

0 Arabella Zhang 3 months ago in reply to Mitch M

TI__Intellectual 1950 points

Thanks for your reply. How high of ESD can this pin withstand? I didn't see it in the manual.

0 Mitch M 3 months ago in reply to Arabella Zhang

TI__Mastermind 23240 points

Hello Arabella,

Here is a snip of the ESD information in the datasheet:

Regards,

Mitch

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INA226: INA226