INA139-Q1: INA139QPWRQ1

Fabio Sepulveda

Part Number: INA139-Q1
Other Parts Discussed in Thread: INA190-Q1, INA139

Tool/software:

We are finding output values below the calculation and a variaton between diferent lots of INA, is this an expected condition?

3 months ago

0 Mallika Senthil 3 months ago

TI__Intellectual 2150 points

Hi Fabio,

The INA139-Q1 has a max offset of +/- 2mV and with a gain of 27, your offset is going to be +/- 54mV. Thus any value that is 94 +/- 54mV is within range.

If you're looking for a part with better accuracy, I would suggest the INA186-Q1and INA190-Q1.

Best,
Mallika Senthil

0 Fabio Sepulveda 3 months ago in reply to Mallika Senthil

Prodigy 10 points

Thank you Mallika

Are there another one with better accuracity but the same package (INA139)? if not we will try increase the shunt and reduce the gain to improve it.

0 Mallika Senthil 3 months ago in reply to Fabio Sepulveda

TI__Intellectual 2150 points

Hi Fabio,

Unfortunately we don't have any pin-compatible devices for INA139, increase shunt and gain should help resolve the issue to an extent.

Best,
Mallika Senthil

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INA139-Q1: INA139QPWRQ1