INA500: can this part works out good precision for 16-bit system

LIU QINGFENG

Part Number: INA500

Hi, I am looking a suitable part for single battery cell voltage monitor and the new INA500 sounds quite good, with max Voso temperature drift is 8.5 µV/° , unfuturately there is no gain drift spec, just said "Maximum gain error of ±0.02% can be expected";

Is it possible to show the gain drift data so we can evalute whether could be used in 16 bits system after calibration?

qingfeng

over 1 year ago

0 Robert Clifton56 over 1 year ago

TI__Mastermind 24010 points

Hi Qingfeng,

I'm glad to hear you are interested in the INA500.

Right now a lot of my colleagues are out for holiday so it might take a while for me to talk to them and verify this answer but I'll try to get back to you as soon as I get some information on this!

Best Regards,

Robert Clifton

+1 Robert Clifton56 over 1 year ago in reply to Robert Clifton56

TI__Mastermind 24010 points

Hi Qingfeng,

Well it turns out I completely missed the graph we have that shows the gain drift over temperature. See below.

Let me know if this is what you are looking for.

Best Regards,

Robert Clifton

0 LIU QINGFENG over 1 year ago in reply to Robert Clifton56

Prodigy 50 points

Robert:

thanks, this is what I am looking for.

Just curious, why the error spike happens at 0 to 50C, which is the most useful band.

Best Regards.

Qingfeng.

+1 Robert Clifton56 over 1 year ago in reply to LIU QINGFENG

TI__Mastermind 24010 points

Hi Qingfeng,

I asked the team that too. Notice this "spike" appears to be a single data point. I don't think it's a true spike, rather a gradual increase then decrease. Hard to say.

Either way this higher area seems to be only a 0.003 - 0.004% difference in the gain error. Not much at all!

0 LIU QINGFENG 12 months ago in reply to Robert Clifton56

Prodigy 50 points

Thanks, feel more comfortable now.

0 Robert Clifton56 12 months ago in reply to LIU QINGFENG

TI__Mastermind 24010 points

Glad I could help!

Best regards,

Robert Clifton

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INA500: can this part works out good precision for 16-bit system