LMP8640HV instead of INA194?

Henry McDonald

Other Parts Discussed in Thread: INA194, LMP8640HV

I have a prototype board that uses an INA194 (SOT-23-5) to measure current from a high side shunt.

Shunt - 0.012 ohms
Current range - 0 - 5 Amps (0 - 60mV)
Common mode voltage - 200mV to 48v (typical will be 1.5v to 48v)

I found that the sensor was terribly inaccurate with low common mode voltages and low Vsns, and then found that this is described in the datasheet. It looks like LMP8640HV-F (SOT-23-6) will just drop onto the footprint and work. Is there anything I'm overlooking that will make this not work?

over 8 years ago

0 Mayrim Verdejo over 8 years ago

TI__Genius 15760 points

Hi Henry,

At simple glance I don't see any problem with using the LMP8640HV. Allow me this afternoon to review the datasheet in detail and see if I spot anything.

0 Henry McDonald over 8 years ago

Prodigy 165 points

I received the LMP8640HV-F parts and installed them on the board. They are working quite well.

0 Mayrim Verdejo over 8 years ago in reply to Henry McDonald

TI__Genius 15760 points

HI Henry,

I thought I replied yesterday afternoon. I did revised the datasheet in detail and did not find anything wrong with using it. Glad it worked well!

Amplifiers

Amplifiers forum

LMP8640HV instead of INA194?