PAN-M,
Any input voltage less than 0.6V will result in the ULN2003LV output being off.
A 0.45V (max) input is fully compatible with the ULN2003LV input low requirement.
Steve,
Can you replace the ULN2003LV or try a different channel? A waveform of the output trying to turn off would also be helpful. The results are very unusual unless the output is permanently damaged in some way.
The internal diodes protect the ULN2003LV…
Give that i only need two channels rather than 7. I would probably go with just two separate mosfets .i.e. http://www.digikey.com/product-detail/en/IRF6201TRPBF/IRF6201TRPBFTR-ND/2354055
On second thought, having gone through the datasheet of the ULN2003LV;…
The problem with using the ULN2003 in 3V systems is the significant voltage drop across the darlington transistor switch.
TI has a MOSFET version of this device that fixes this problem ULN2003LV.
Peter
Marko,
The ULN2003LV would be the lowest cost solution, but it may not be fast enough.
You could try using analog switches with one side of the switch connected to ground. I attached a list of SPST switches that have an on/off time less than 18nS.
Can the EVM for the ULV2003LV be ordered?
The status says preview and there is a user guide out with instructions on the EVM, however it doesn't seem to be able to be ordered. Any help on this matter would be greatly appreciated!
Regards,
Rachel
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