Sharing a current shunt?

[Things]

Hey guys,

I'm working on an electric scooter project, and seeing as it'll use LiPo packs (And lots of them!), I'm taking protection very seriously. I have found a battery protection/monitoring IC from TI that fits my needs perfectly.

However, on this same board I also want a uC, to do various things like current, speed, temp readouts etc.

So what I'm wondering, is the battery monitoring IC has inputs for a current shunt, which it can monitor and shut off the discharge FET, but I also want to be able to give a current readout on a LCD from the uC.

Is there any accurate way I could share readings from a current shunt between both devices? 2 shunts in series possibly, one for each device?

Cheers,
Dan

[grenert]

Since the measurement of a current shunt is voltage, as long as your voltage measuring device is reasonably high impedance you should not have a problem.

[Things]

Oddly enough neither chips seem to specify input impedance.

[c4757p]

Measure it. Ohm's law is your friend.

[Neilm]

Some of the battery monitor chips TI do can report the current value to a supervisor MCU. If you want to share the current shunt there should be no problem provided you have a high impedance. If you are not sure, you could always use an op-amp to buffer it.

Neil