| Electronics > Projects, Designs, and Technical Stuff |
| Strange ADC behavior at lower voltages using an MSP430 |
| << < (3/3) |
| smoothVTer:
So it all turns out the NFET was turning on fully, but the PFET was not due to the lowered source-to-drain voltage when VBATT was low. The PFET in the DMC3400 device had a max Vth of -2.6V ! So, my bad on that miss. Luckily, I found another pin-for-pin compatible NMOS/PMOS pair in the same SOT-363 package: the DMG1016UDW which has a max Vth of 1.0V nmos / -1.0V pmos. So don't have to do another board rev, only a BOM revision. Thanks for chiming in everybody! When I have time I will look into doing this a bit simpler using one of the suggestions above. |
| Navigation |
| Message Index |
| Previous page |