Compliance of 100uA source

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Adrian Freed
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Compliance of 100uA source

I am trying to compare an external resistance value using the constant current source option for comparators to establish
the voltage.

The data sheet for SLG46533 suggests the constant current is sourced from 1.8v (and says input has to be less than 1.8v)
but I still don't know the compliance of the source.

the data sheet for SLG46880 and SLG46826 omits the current source which is available optionally on cmp0 in comparator or pin schematic

the data sheet for the SLG46620 has a the source in the schematic doesn't indicate where the current comes from.

Obviously I need the compliance to figure out the maximum resistance value I can compare with this method. The tolerance
on the current source would be helpful too...

thanks.

Device: 
Device Number: 
SLG46880, SLG46620,
PavloZ
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Last seen: 2 days 15 hours ago
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Joined: 2018-01-31 12:50
Hi Adrian, sorry for the

Hi Adrian, sorry for the delay with answer.

The current source of SLG46620, SLG46533 supplied from internal 1.8v source, however SLG46880, SLG46826 are supplied from VDD. But threre are nonlinearity near 0.7V at higher voltage range and the better results are at loads when voltages are 0...1.8V-0.7V and VDD-0.7 respectively.

The datasheets will be updated soon. Thanks.

Adrian Freed
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Last seen: 2 weeks 8 hours ago
Joined: 2018-09-25 00:10
Thanks very much. I hope the

Thanks very much. I hope the new data sheets also include some accuracy/precision specs for the current sources.